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198 Commits (966cd42c7d58bca3af9c16b5d6d5df49a72ef7b4)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Jay Zhuang
|
8124bc3526 |
Enable preclude_last_level_data_seconds in stress test (#10824)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10824 Reviewed By: siying Differential Revision: D40390535 Pulled By: jay-zhuang fbshipit-source-id: 700803a1aff8a1e77c038740d87931577e79bcf6 |
2 years ago |
|
Levi Tamasi
|
eae3a686ee |
Check wide columns in TestIterate (#10818)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10818 Test Plan: Tested using some simple blackbox crash test runs in the various modes (non-batched, batched, CF consistency). Reviewed By: riversand963 Differential Revision: D40349527 Pulled By: ltamasi fbshipit-source-id: 2918bc26adbbeac314beaa958aafe770b01e5cc6 |
2 years ago |
|
Levi Tamasi
|
85399b14f7 |
Consider wide columns when checksumming in the stress tests (#10788)
Summary: There are two places in the stress test code where we compute the CRC for a range of KVs for the purposes of checking consistency, namely in the CF consistency test (to make sure CFs contain the same data), and when performing `CompactRange` (to make sure the pre- and post-compaction states are equivalent). The patch extends the logic so that wide columns are also considered in both cases. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10788 Test Plan: Tested using some simple blackbox crash test runs. Reviewed By: riversand963 Differential Revision: D40191134 Pulled By: ltamasi fbshipit-source-id: 542c21cac9077c6d225780deb210319bb5eee955 |
2 years ago |
|
Hui Xiao
|
f6a0065d54 |
Allow Flush(sync=true) not supported in DB::Open() and db_stress (#10784)
Summary: **Context:** https://github.com/facebook/rocksdb/pull/10698 made `Flush(sync=true)` required for` DB::Open()` (to pass the original but now deleted assertion `impl->TEST_WALBufferIsEmpty()` under `manual_wal_flush=true`, see https://github.com/facebook/rocksdb/pull/10698 summary for more ) as well as db_stress to pass. However RocksDB users may not implement SyncWAL() (used inFlush(sync=true)). Therefore we replace such in DB::Open and db_stress in this PR and align with https://github.com/facebook/rocksdb/blob/main/db/db_impl/db_impl_open.cc#L1883-L1887 and https://github.com/facebook/rocksdb/blob/main/db_stress_tool/db_stress_test_base.cc#L847-L849 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10784 Test Plan: make check Reviewed By: anand1976 Differential Revision: D40193354 Pulled By: anand1976 fbshipit-source-id: e80d53880799ae01bdd717641d07997d3bfe2b54 |
2 years ago |
|
Levi Tamasi
|
d6d8c007ff |
Verify columns in NonBatchedOpsStressTest::VerifyDb (#10783)
Summary: As the first step of covering the wide-column functionality of iterators in our stress tests, the patch adds verification logic to `NonBatchedOpsStressTest::VerifyDb` that checks whether the iterator's value and columns are in sync. Note: I plan to update the other types of stress tests and add similar verification for prefix scans etc. in separate PRs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10783 Test Plan: Ran some simple blackbox crash tests. Reviewed By: riversand963 Differential Revision: D40152370 Pulled By: riversand963 fbshipit-source-id: 8f9d17d7af5da58ccf1bd2057cab53cc9645ac35 |
2 years ago |
|
Peter Dillinger
|
b205c6d029 |
Fix bug in HyperClockCache ApplyToEntries; cleanup (#10768)
Summary: We have seen some rare crash test failures in HyperClockCache, and the source could certainly be a bug fixed in this change, in ClockHandleTable::ConstApplyToEntriesRange. It wasn't properly accounting for the fact that incrementing the acquire counter could be ineffective, due to parallel updates. (When incrementing the acquire counter is ineffective, it is incorrect to then decrement it.) This change includes some other minor clean-up in HyperClockCache, and adds stats_dump_period_sec with a much lower period to the crash test. This should be the primary caller of ApplyToEntries, in collecting cache entry stats. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10768 Test Plan: haven't been able to reproduce the failure, but should be in a better state (bug fix and improved crash test) Reviewed By: anand1976 Differential Revision: D40034747 Pulled By: anand1976 fbshipit-source-id: a06fcefe146e17ee35001984445cedcf3b63eb68 |
2 years ago |
|
Changyu Bi
|
9f2363f4c4 |
User-defined timestamp support for `DeleteRange()` (#10661)
Summary: Add user-defined timestamp support for range deletion. The new API is `DeleteRange(opt, cf, begin_key, end_key, ts)`. Most of the change is to update the comparator to compare without timestamp. Other than that, major changes are - internal range tombstone data structures (`FragmentedRangeTombstoneList`, `RangeTombstone`, etc.) to store timestamps. - Garbage collection of range tombstones and range tombstone covered keys during compaction. - Get()/MultiGet() to return the timestamp of a range tombstone when needed. - Get/Iterator with range tombstones bounded by readoptions.timestamp. - timestamp crash test now issues DeleteRange by default. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10661 Test Plan: - Added unit test: `make check` - Stress test: `python3 tools/db_crashtest.py --enable_ts whitebox --readpercent=57 --prefixpercent=4 --writepercent=25 -delpercent=5 --iterpercent=5 --delrangepercent=4` - Ran `db_bench` to measure regression when timestamp is not enabled. The tests are for write (with some range deletion) and iterate with DB fitting in memory: `./db_bench--benchmarks=fillrandom,seekrandom --writes_per_range_tombstone=200 --max_write_buffer_number=100 --min_write_buffer_number_to_merge=100 --writes=500000 --reads=500000 --seek_nexts=10 --disable_auto_compactions -disable_wal=true --max_num_range_tombstones=1000`. Did not see consistent regression in no timestamp case. | micros/op | fillrandom | seekrandom | | --- | --- | --- | |main| 2.58 |10.96| |PR 10661| 2.68 |10.63| Reviewed By: riversand963 Differential Revision: D39441192 Pulled By: cbi42 fbshipit-source-id: f05aca3c41605caf110daf0ff405919f300ddec2 |
2 years ago |
|
Hui Xiao
|
3b8164912e |
Add manual_wal_flush, FlushWAL() to stress/crash test (#10698)
Summary:
**Context/Summary:**
Introduce `manual_wal_flush_one_in` as titled.
- When `manual_wal_flush_one_in > 0`, we also need tracing to correctly verify recovery because WAL data can be lost in this case when `FlushWAL()` is not explicitly called by users of RocksDB (in our case, db stress) and the recovery from such potential WAL data loss is a prefix recovery that requires tracing to verify. As another consequence, we need to disable features can't run under unsync data loss with `manual_wal_flush_one_in`
Incompatibilities fixed along the way:
```
db_stress: db/db_impl/db_impl_open.cc:2063: static rocksdb::Status rocksdb::DBImpl::Open(const rocksdb::DBOptions&, const string&, const std::vector<rocksdb::ColumnFamilyDescriptor>&, std::vector<rocksdb::ColumnFamilyHandle*>*, rocksdb::DB**, bool, bool): Assertion `impl->TEST_WALBufferIsEmpty()' failed.
```
- It turns out that `Writer::AddCompressionTypeRecord` before this assertion `EmitPhysicalRecord(kSetCompressionType, encode.data(), encode.size());` but do not trigger flush if `manual_wal_flush` is set . This leads to `impl->TEST_WALBufferIsEmpty()' is false.
- As suggested, assertion is removed and violation case is handled by `FlushWAL(sync=true)` along with refactoring `TEST_WALBufferIsEmpty()` to be `WALBufferIsEmpty()` since it is used in prod code now.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10698
Test Plan:
- Locally running `python3 tools/db_crashtest.py blackbox --manual_wal_flush_one_in=1 --manual_wal_flush=1 --sync_wal_one_in=100 --atomic_flush=1 --flush_one_in=100 --column_families=3`
- Joined https://github.com/facebook/rocksdb/pull/10624 in auto CI testings with all RocksDB stress/crash test jobs
Reviewed By: ajkr
Differential Revision: D39593752
Pulled By: ajkr
fbshipit-source-id: 3a2135bb792c52d2ffa60257d4fbc557fb04d2ce
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2 years ago |
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Levi Tamasi
|
9078fcccee |
Add the PutEntity API to the stress/crash tests (#10760)
Summary: The patch adds the `PutEntity` API to the non-batched, batched, and CF consistency stress tests. Namely, when the new `db_stress` command line parameter `use_put_entity_one_in` is greater than zero, one in N writes on average is performed using `PutEntity` rather than `Put`. The wide-column entity written has the generated value in its default column; in addition, it contains up to three additional columns where the original generated value is divided up between the column name and the column value (with the column name containing the first k characters of the generated value, and the column value containing the rest). Whether `PutEntity` is used (and if so, how many columns the entity has) is completely determined by the "value base" used to generate the value (that is, there is no randomness involved). Assuming the same `use_put_entity_one_in` setting is used across `db_stress` invocations, this enables us to reconstruct and validate the entity during subsequent `db_stress` runs. Note that `PutEntity` is currently incompatible with `Merge`, transactions, and user-defined timestamps; these combinations are currently disabled/disallowed. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10760 Test Plan: Ran some batched, non-batched, and CF consistency stress tests using the script. Reviewed By: riversand963 Differential Revision: D39939032 Pulled By: ltamasi fbshipit-source-id: eafdf124e95993fb7d73158e3b006d11819f7fa9 |
2 years ago |
|
Hui Xiao
|
f3b359a549 |
Set options.num_levels in db_stress_test_base (#10732)
Summary: An add-on to https://github.com/facebook/rocksdb/pull/6818 to complete adding single-level universal compaction to stress/crash testing. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10732 Test Plan: - Locally run for 10 min `python3 ./tools/db_crashtest.py whitebox --simple --compaction_style=1 --num_levels=1 -max_key=1000000 -value_size_mult=33 -write_buffer_size=524288 -target_file_size_base=524288 -max_bytes_for_level_base=2097152 --duration=120 --interval=10 --ops_per_thread=1000 --random_kill_odd=887` - Check LOG to confirm single-level universal compaction is called - Manual testing and log checking to ensure destroy_db_initially=1 is correctly set across runs with different compaction styles (i.e, in the second half of whitebox testing). - [ongoing]CI jobs stress test Reviewed By: ajkr Differential Revision: D39797612 Pulled By: ajkr fbshipit-source-id: 16f5c40c3464c57360c06c8305f92118e426149c |
2 years ago |
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Hui Xiao
|
aed30ddf21 |
Support WriteCommit policy with sync_fault_injection=1 (#10624)
Summary:
**Context:**
Prior to this PR, correctness testing with un-sync data loss [disabled](https://github.com/facebook/rocksdb/pull/10605) transaction (`use_txn=1`) thus all of the `txn_write_policy` . This PR improved that by adding support for one policy - WriteCommit (`txn_write_policy=0`).
**Summary:**
They key to this support is (a) handle Mark{Begin, End}Prepare/MarkCommit/MarkRollback in constructing ExpectedState under WriteCommit policy correctly and (b) monitor CI jobs and solve any test incompatibility issue till jobs are stable. (b) will be part of the test plan.
For (a)
- During prepare (i.e, between `MarkBeginPrepare()` and `MarkEndPrepare(xid)`), `ExpectedStateTraceRecordHandler` will buffer all writes by adding all writes to an internal `WriteBatch`.
- On `MarkEndPrepare()`, that `WriteBatch` will be associated with the transaction's `xid`.
- During the commit (i.e, on `MarkCommit(xid)`), `ExpectedStateTraceRecordHandler` will retrieve and iterate the internal `WriteBatch` and finally apply those writes to `ExpectedState`
- During the rollback (i.e, on `MarkRollback(xid)`), `ExpectedStateTraceRecordHandler` will erase the internal `WriteBatch` from the map.
For (b) - one major issue described below:
- TransactionsDB in db stress recovers prepared-but-not-committed txns from the previous crashed run by randomly committing or rolling back it at the start of the current run, see a historical [PR](
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2 years ago |
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Peter Dillinger
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0f91c72adc |
Call experimental new clock cache HyperClockCache (#10684)
Summary: This change establishes a distinctive name for the experimental new lock-free clock cache (originally developed by guidotag and revamped in PR https://github.com/facebook/rocksdb/issues/10626). A few reasons: * We want to make it clear that this is a fundamentally different implementation vs. the old clock cache, to avoid people saying "I already tried clock cache." * We want to highlight the key feature: it's fast (especially under parallel load) * Because it requires an estimated charge per entry, it is not drop-in API compatible with old clock cache. This estimate might always be required for highest performance, and giving it a distinct name should reduce confusion about the distinct API requirements. * We might develop a variant requiring the same estimate parameter but with LRU eviction. In that case, using the name HyperLRUCache should make things more clear. (FastLRUCache is just a prototype that might soon be removed.) Some API detail: * To reduce copy-pasting parameter lists, etc. as in LRUCache construction, I have a `MakeSharedCache()` function on `HyperClockCacheOptions` instead of `NewHyperClockCache()`. * Changes -cache_type=clock_cache to -cache_type=hyper_clock_cache for applicable tools. I think this is more consistent / sustainable for reasons already stated. For performance tests see https://github.com/facebook/rocksdb/pull/10626 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10684 Test Plan: no interesting functional changes; tests updated Reviewed By: anand1976 Differential Revision: D39547800 Pulled By: pdillinger fbshipit-source-id: 5c0fe1b5cf3cb680ab369b928c8569682b9795bf |
2 years ago |
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Andrew Kryczka
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6ce782beaf |
move db_stress locking to `StressTest::Test*()` functions (#10678)
Summary: One problem of the previous strategy was `NonBatchedOpsStressTest::TestIngestExternalFile()` could release the lock for `rand_keys[0]` in `rand_column_families[0]`, and then subsequent operations in the same loop iteration (e.g., `TestPut()`) would run without locking. This PR changes the strategy so each `Test*()` function is responsible for acquiring and releasing its own locks. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10678 Reviewed By: hx235 Differential Revision: D39516401 Pulled By: ajkr fbshipit-source-id: bf67f12ebbd293ba8c24fdf8754ff28737bcd758 |
2 years ago |
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Andrew Kryczka
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03c4ea26bb |
db_stress option to preserve all files until verification success (#10659)
Summary: In `db_stress`, DB and expected state files containing changes leading up to a verification failure are often deleted, which makes debugging such failures difficult. On the DB side, flushed WAL files and compacted SST files are marked obsolete and then deleted. Without those files, we cannot pinpoint where a key that failed verification changed unexpectedly. On the expected state side, files for verifying prefix-recoverability in the presence of unsynced data loss are deleted before verification. These include a baseline state file containing the expected state at the time of the last successful verification, and a trace file containing all operations since then. Without those files, we cannot know the sequence of DB operations expected to be recovered. This PR attempts to address this gap with a new `db_stress` flag: `preserve_unverified_changes`. Setting `preserve_unverified_changes=1` has two effects. First, prior to startup verification, `db_stress` hardlinks all DB and expected state files in "unverified/" subdirectories of `FLAGS_db` and `FLAGS_expected_values_dir`. The separate directories are needed because the pre-verification opening process deletes files written by the previous `db_stress` run as described above. These "unverified/" subdirectories are cleaned up following startup verification success. I considered other approaches for preserving DB files through startup verification, like using a read-only DB or preventing deletion of DB files externally, e.g., in the `Env` layer. However, I decided against it since such an approach would not work for expected state files, and I did not want to change the DB management logic. If there were a way to disable DB file deletions before regular DB open, I would have preferred to use that. Second, `db_stress` attempts to keep all DB and expected state files that were live at some point since the start of the `db_stress` run. This is a bit tricky and involves the following changes. - Open the DB with `disable_auto_compactions=1` and `avoid_flush_during_recovery=1` - DisableFileDeletions() - EnableAutoCompactions() For this part, too, I would have preferred to use a hypothetical API that disables DB file deletion before regular DB open. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10659 Reviewed By: hx235 Differential Revision: D39407454 Pulled By: ajkr fbshipit-source-id: 6e981025c7dce147649d2e770728471395a7fa53 |
2 years ago |
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Akanksha Mahajan
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7a9ecdac3c |
Add auto prefetching parameters to db_bench and db_stress (#10632)
Summary: Same as title Pull Request resolved: https://github.com/facebook/rocksdb/pull/10632 Test Plan: make crash_test -j32 Reviewed By: anand1976 Differential Revision: D39241479 Pulled By: akankshamahajan15 fbshipit-source-id: 5db5b0c007da786bacc1b30d8926d36d6d029b87 |
2 years ago |
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Andrew Kryczka
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ccf822492f |
Reenable sync_fault_injection in crash test (#10172)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10172 Reviewed By: riversand963 Differential Revision: D37164671 Pulled By: ajkr fbshipit-source-id: 40eb919b8dc261d502510e878ee8ac7874ab35d0 |
2 years ago |
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Levi Tamasi
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228f2c5bf5 |
Adjust the blob cache printout in db_bench/db_stress (#10614)
Summary: Currently, `db_bench` and `db_stress` print the blob cache options even if a shared block/blob cache is configured, i.e. when they are not actually in effect. The patch changes this so they are only printed when a separate blob cache is used. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10614 Test Plan: Tested manually using `db_bench` and `db_stress`. Reviewed By: akankshamahajan15 Differential Revision: D39144603 Pulled By: ltamasi fbshipit-source-id: f714304c5d46186f8514746c27ee6f52aa3e4af8 |
2 years ago |
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Yanqin Jin
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3613d862ba |
print value when verification fails (#10587)
Summary: When verification fails for db_stress, print more information about value read from the db and expected state. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10587 Test Plan: make check ./db_stress Reviewed By: akankshamahajan15, hx235 Differential Revision: D39078511 Pulled By: riversand963 fbshipit-source-id: 77ac8ffae01fc3a9b58a02c2e7bbe141e1a18f0b |
2 years ago |
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Changyu Bi
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d140fbfd7d |
Add Iterator test against expected state to stress test (#10538)
Summary: As mentioned in https://github.com/facebook/rocksdb/pull/5506#issuecomment-506021913, `db_stress` does not have much verification for iterator correctness. It has a `TestIterate()` function, but that is mainly for comparing results between two iterators, one with `total_order_seek` and the other optionally sets auto_prefix, upper/lower bounds. Commit 49a0581ad2462e31aa3f768afa769e0d33390f33 added a new `TestIterateAgainstExpected()` function that compares iterator against expected state. It locks a range of keys, creates an iterator, does a random sequence of `Next/Prev` and compares against expected state. This PR is based on that commit, the main changes include some logs (for easier debugging if a test fails), a forward and backward scan to cover the entire locked key range, and a flag for optionally turning on this version of Iterator testing. Added constraint that the checks against expected state in `TestIterateAgainstExpected()` and in `TestGet()` are only turned on when `--skip_verifydb` flag is not set. Remove the change log introduced in https://github.com/facebook/rocksdb/issues/10553. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10538 Test Plan: Run `db_stress` with `--verify_iterator_with_expected_state_one_in=1`, and a large `--iterpercent` and `--num_iterations`. Checked `op_logs` manually to ensure expected coverage. Tweaked part of the code in https://github.com/facebook/rocksdb/issues/10449 and stress test was able to catch it. - internally run various flavor of crash test Reviewed By: ajkr Differential Revision: D38847269 Pulled By: cbi42 fbshipit-source-id: 8b4402a9bba9f6cfa08051943cd672579d489599 |
2 years ago |
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Changyu Bi
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fd165c869d |
Add memtable per key-value checksum (#10281)
Summary: Append per key-value checksum to internal key. These checksums are verified on read paths including Get, Iterator and during Flush. Get and Iterator will return `Corruption` status if there is a checksum verification failure. Flush will make DB become read-only upon memtable entry checksum verification failure. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10281 Test Plan: - Added new unit test cases: `make check` - Benchmark on memtable insert ``` TEST_TMPDIR=/dev/shm/memtable_write ./db_bench -benchmarks=fillseq -disable_wal=true -max_write_buffer_number=100 -num=10000000 -min_write_buffer_number_to_merge=100 # avg over 10 runs Baseline: 1166936 ops/sec memtable 2 bytes kv checksum : 1.11674e+06 ops/sec (-4%) memtable 2 bytes kv checksum + write batch 8 bytes kv checksum: 1.08579e+06 ops/sec (-6.95%) write batch 8 bytes kv checksum: 1.17979e+06 ops/sec (+1.1%) ``` - Benchmark on only memtable read: ops/sec dropped 31% for `readseq` due to time spend on verifying checksum. ops/sec for `readrandom` dropped ~6.8%. ``` # Readseq sudo TEST_TMPDIR=/dev/shm/memtable_read ./db_bench -benchmarks=fillseq,readseq"[-X20]" -disable_wal=true -max_write_buffer_number=100 -num=10000000 -min_write_buffer_number_to_merge=100 readseq [AVG 20 runs] : 7432840 (± 212005) ops/sec; 822.3 (± 23.5) MB/sec readseq [MEDIAN 20 runs] : 7573878 ops/sec; 837.9 MB/sec With -memtable_protection_bytes_per_key=2: readseq [AVG 20 runs] : 5134607 (± 119596) ops/sec; 568.0 (± 13.2) MB/sec readseq [MEDIAN 20 runs] : 5232946 ops/sec; 578.9 MB/sec # Readrandom sudo TEST_TMPDIR=/dev/shm/memtable_read ./db_bench -benchmarks=fillrandom,readrandom"[-X10]" -disable_wal=true -max_write_buffer_number=100 -num=1000000 -min_write_buffer_number_to_merge=100 readrandom [AVG 10 runs] : 140236 (± 3938) ops/sec; 9.8 (± 0.3) MB/sec readrandom [MEDIAN 10 runs] : 140545 ops/sec; 9.8 MB/sec With -memtable_protection_bytes_per_key=2: readrandom [AVG 10 runs] : 130632 (± 2738) ops/sec; 9.1 (± 0.2) MB/sec readrandom [MEDIAN 10 runs] : 130341 ops/sec; 9.1 MB/sec ``` - Stress test: `python3 -u tools/db_crashtest.py whitebox --duration=1800` Reviewed By: ajkr Differential Revision: D37607896 Pulled By: cbi42 fbshipit-source-id: fdaefb475629d2471780d4a5f5bf81b44ee56113 |
2 years ago |
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Jay Zhuang
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1e86d424e4 |
Tiered storage stress test (#10493)
Summary: Add Tiered storage stress test and db_bench option Pull Request resolved: https://github.com/facebook/rocksdb/pull/10493 Test Plan: new crashtest: https://app.circleci.com/pipelines/github/facebook/rocksdb/16905/workflows/68c2967c-9274-434f-8506-1403cf441ead Reviewed By: ajkr Differential Revision: D38481892 Pulled By: jay-zhuang fbshipit-source-id: 217a0be4acb93d420222e6ede2a1290d9f464776 |
2 years ago |
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Yanqin Jin
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b443d24f4d |
Stop operating on DB in a stress test background thread (#10373)
Summary: Stress test background threads do not coordinate with test worker threads for db reopen in the middle of a test run, thus accessing db obj in a stress test bg thread can race with test workers. Remove the TimestampedSnapshotThread. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10373 Test Plan: ``` ./db_stress --acquire_snapshot_one_in=0 --adaptive_readahead=0 --allow_concurrent_memtable_write=1 \ --allow_data_in_errors=True --async_io=0 --avoid_flush_during_recovery=0 --avoid_unnecessary_blocking_io=1 \ --backup_max_size=104857600 --backup_one_in=100000 --batch_protection_bytes_per_key=8 \ --block_size=16384 --bloom_bits=7.580319535285394 --bottommost_compression_type=disable \ --bytes_per_sync=262144 --cache_index_and_filter_blocks=0 --cache_size=8388608 --cache_type=lru_cache \ --charge_compression_dictionary_building_buffer=1 --charge_file_metadata=0 --charge_filter_construction=1 \ --charge_table_reader=0 --checkpoint_one_in=0 --checksum_type=kxxHash64 --clear_column_family_one_in=0 \ --compact_files_one_in=1000000 --compact_range_one_in=0 --compaction_pri=1 --compaction_ttl=0 \ --compression_max_dict_buffer_bytes=0 --compression_max_dict_bytes=0 --compression_parallel_threads=1 \ --compression_type=xpress --compression_use_zstd_dict_trainer=1 --compression_zstd_max_train_bytes=0 \ --continuous_verification_interval=0 --create_timestamped_snapshot_one_in=20 --data_block_index_type=0 \ --db=/dev/shm/rocksdb/ --db_write_buffer_size=0 --delpercent=5 --delrangepercent=0 --destroy_db_initially=1 \ --detect_filter_construct_corruption=0 --disable_wal=0 --enable_compaction_filter=1 --enable_pipelined_write=0 \ --fail_if_options_file_error=1 --file_checksum_impl=xxh64 --flush_one_in=1000000 --format_version=2 \ --get_current_wal_file_one_in=0 --get_live_files_one_in=1000000 --get_property_one_in=1000000 \ --get_sorted_wal_files_one_in=0 --index_block_restart_interval=11 --index_type=0 --ingest_external_file_one_in=0 \ --iterpercent=0 --key_len_percent_dist=1,30,69 --level_compaction_dynamic_level_bytes=True \ --log2_keys_per_lock=10 --long_running_snapshots=0 --mark_for_compaction_one_file_in=10 \ --max_background_compactions=20 --max_bytes_for_level_base=10485760 --max_key=25000000 \ --max_key_len=3 --max_manifest_file_size=1073741824 --max_write_batch_group_size_bytes=64 \ --max_write_buffer_number=3 --max_write_buffer_size_to_maintain=0 --memtable_prefix_bloom_size_ratio=0.5 \ --memtable_whole_key_filtering=1 --memtablerep=skip_list --mmap_read=0 --mock_direct_io=True \ --nooverwritepercent=1 --open_files=500000 --open_metadata_write_fault_one_in=0 \ --open_read_fault_one_in=0 --open_write_fault_one_in=0 --ops_per_thread=20000 \ --optimize_filters_for_memory=1 --paranoid_file_checks=1 --partition_filters=0 --partition_pinning=2 \ --pause_background_one_in=1000000 --periodic_compaction_seconds=0 --prefix_size=1 \ --prefixpercent=5 --prepopulate_block_cache=0 --progress_reports=0 --read_fault_one_in=1000 \ --readpercent=55 --recycle_log_file_num=0 --reopen=100 --ribbon_starting_level=8 \ --secondary_cache_fault_one_in=0 --secondary_cache_uri= --snapshot_hold_ops=100000 \ --sst_file_manager_bytes_per_sec=104857600 --sst_file_manager_bytes_per_truncate=0 \ --subcompactions=3 --sync=0 --sync_fault_injection=0 --target_file_size_base=2097152 \ --target_file_size_multiplier=2 --test_batches_snapshots=0 --top_level_index_pinning=1 \ --txn_write_policy=0 --unordered_write=0 --unpartitioned_pinning=0 \ --use_direct_io_for_flush_and_compaction=0 --use_direct_reads=1 --use_full_merge_v1=1 \ --use_merge=1 --use_multiget=0 --use_txn=1 --user_timestamp_size=0 --value_size_mult=32 \ --verify_checksum=1 --verify_checksum_one_in=1000000 --verify_db_one_in=100000 \ --verify_sst_unique_id_in_manifest=1 --wal_bytes_per_sync=0 --wal_compression=none \ --write_buffer_size=4194304 --write_dbid_to_manifest=0 --writepercent=35 ``` make crash_test_with_txn make crash_test_with_multiops_wc_txn Reviewed By: jay-zhuang Differential Revision: D37903189 Pulled By: riversand963 fbshipit-source-id: cd1728ad7ba4ce4cf47af23c4f65dda0956744f9 |
2 years ago |
|
Gang Liao
|
0b6bc101ba |
Charge blob cache usage against the global memory limit (#10321)
Summary: To help service owners to manage their memory budget effectively, we have been working towards counting all major memory users inside RocksDB towards a single global memory limit (see e.g. https://github.com/facebook/rocksdb/wiki/Write-Buffer-Manager#cost-memory-used-in-memtable-to-block-cache). The global limit is specified by the capacity of the block-based table's block cache, and is technically implemented by inserting dummy entries ("reservations") into the block cache. The goal of this task is to support charging the memory usage of the new blob cache against this global memory limit when the backing cache of the blob cache and the block cache are different. This PR is a part of https://github.com/facebook/rocksdb/issues/10156 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10321 Reviewed By: ltamasi Differential Revision: D37913590 Pulled By: gangliao fbshipit-source-id: eaacf23907f82dc7d18964a3f24d7039a2937a72 |
2 years ago |
|
Gang Liao
|
ec4ebeff30 |
Support prepopulating/warming the blob cache (#10298)
Summary: Many workloads have temporal locality, where recently written items are read back in a short period of time. When using remote file systems, this is inefficient since it involves network traffic and higher latencies. Because of this, we would like to support prepopulating the blob cache during flush. This task is a part of https://github.com/facebook/rocksdb/issues/10156 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10298 Reviewed By: ltamasi Differential Revision: D37908743 Pulled By: gangliao fbshipit-source-id: 9feaed234bc719d38f0c02975c1ad19fa4bb37d1 |
2 years ago |
|
Guido Tagliavini Ponce
|
7e1b417824 |
Revert NewClockCache signature (#10358)
Summary: This complements https://github.com/facebook/rocksdb/issues/10351. This PR reverts NewClockCache's signature to an older version, expected by the users of the old (buggy) ClockCache. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10358 Test Plan: ``make -j24 check`` and re-run the pre-release tests. Reviewed By: siying Differential Revision: D37832601 Pulled By: guidotag fbshipit-source-id: 32a91d3da4119be187935003b7b897272ceb1950 |
2 years ago |
|
Yanqin Jin
|
2f13f5f7d0 |
Add coverage for timestamped snapshot to MultiOpsTxnsStressTest (#10325)
Summary: As title. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10325 Test Plan: ```bash TEST_TMPDIR=/dev/shm/rocksdb/ make crash_test_with_multiops_wc_txn TEST_TMPDIR=/dev/shm/rocksdb/ make crash_test_with_txn ``` Reviewed By: akankshamahajan15 Differential Revision: D37688742 Pulled By: riversand963 fbshipit-source-id: e198ace921898af63f99e869568c1a7bbf69f1a4 |
2 years ago |
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Yanqin Jin
|
caced09e79 |
Expand stress test coverage for user-defined timestamp (#10280)
Summary: Before this PR, we call `now()` to get the wall time before performing point-lookup and range scans when user-defined timestamp is enabled. With this PR, we expand the coverage to: - read with an older timestamp which is larger then the wall time when the process starts but potentially smaller than now() - add coverage for `ReadOptions::iter_start_ts != nullptr` Pull Request resolved: https://github.com/facebook/rocksdb/pull/10280 Test Plan: ```bash make check ``` Also, ```bash TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_ts ``` So far, we have had four successful runs of the above In addition, ```bash TEST_TMPDIR=/dev/shm/rocksdb make crash_test ``` Succeeded twice showing no regression. Reviewed By: ltamasi Differential Revision: D37539805 Pulled By: riversand963 fbshipit-source-id: f2d9887ad95245945ce17a014d55bb93f00e1cb5 |
2 years ago |
|
zczhu
|
e716bda010 |
Add FLAGS_compaction_pri into crash_test (#10255)
Summary: Add FLAGS_compaction_pri into correctness test Pull Request resolved: https://github.com/facebook/rocksdb/pull/10255 Test Plan: run crash_test with FLAGS_compaction_pri Reviewed By: ajkr Differential Revision: D37510372 Pulled By: littlepig2013 fbshipit-source-id: 73d93a0a047d0c3993c8a512383dd6ee6acef641 |
2 years ago |
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Guido Tagliavini Ponce
|
57a0e2f304 |
Clock cache (#10273)
Summary: This is the initial step in the development of a lock-free clock cache. This PR includes the base hash table design (which we mostly ported over from FastLRUCache) and the clock eviction algorithm. Importantly, it's still _not_ lock-free---all operations use a shard lock. Besides the locking, there are other features left as future work: - Remove keys from the handles. Instead, use 128-bit bijective hashes of them for handle comparisons, probing (we need two 32-bit hashes of the key for double hashing) and sharding (we need one 6-bit hash). - Remove the clock_usage_ field, which is updated on every lookup. Even if it were atomically updated, it could cause memory invalidations across cores. - Middle insertions into the clock list. - A test that exercises the clock eviction policy. - Update the Java API of ClockCache and Java calls to C++. Along the way, we improved the code and comments quality of FastLRUCache. These changes are relatively minor. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10273 Test Plan: ``make -j24 check`` Reviewed By: pdillinger Differential Revision: D37522461 Pulled By: guidotag fbshipit-source-id: 3d70b737dbb70dcf662f00cef8c609750f083943 |
2 years ago |
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Gang Liao
|
d7ebb58cb5 |
Add blob cache tickers, perf context statistics, and DB properties (#10203)
Summary: In order to be able to monitor the performance of the new blob cache, we made the follow changes: - Add blob cache hit/miss/insertion tickers (see https://github.com/facebook/rocksdb/wiki/Statistics) - Extend the perf context similarly (see https://github.com/facebook/rocksdb/wiki/Perf-Context-and-IO-Stats-Context) - Implement new DB properties (see e.g. https://github.com/facebook/rocksdb/blob/main/include/rocksdb/db.h#L1042-L1051) that expose the capacity and current usage of the blob cache. This PR is a part of https://github.com/facebook/rocksdb/issues/10156 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10203 Reviewed By: ltamasi Differential Revision: D37478658 Pulled By: gangliao fbshipit-source-id: d8ee3f41d47315ef725e4551226330b4b6832e40 |
2 years ago |
|
Yanqin Jin
|
d3de59255a |
Enable compaction filter for db_stress with user-defined timestamp (#10259)
Summary: Before this PR, when user-defined timestamp is enabled, db_stress disables compaction filter. This is no longer necessary after this PR, since the `DbStressCompactionFilter` is now aware of the presence of timestamps. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10259 Test Plan: TEST_TMPDIR=/dev/shm make crash_test_with_ts Reviewed By: ajkr Differential Revision: D37459692 Pulled By: riversand963 fbshipit-source-id: 8fe62e90a63bd9317fe1bb95a2b4984080c9e5ef |
2 years ago |
|
Andrew Kryczka
|
f322f273b0 |
Temporarily disable mempurge in crash test (#10252)
Summary: Need to disable it for now as CI is failing, particularly `MultiOpsTxnsStressTest`. Investigation details in internal task T124324915. This PR disables mempurge more widely than `MultiOpsTxnsStressTest` until we know the issue is contained to that particular test. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10252 Reviewed By: riversand963 Differential Revision: D37432948 Pulled By: ajkr fbshipit-source-id: d0cf5b0e0ec7c3142c382a0347f35a4c34f4607a |
2 years ago |
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Baptiste Lemaire
|
5879053fd0 |
Dynamically changeable `MemPurge` option (#10011)
Summary: **Summary** Make the mempurge option flag a Mutable Column Family option flag. Therefore, the mempurge feature can be dynamically toggled. **Motivation** RocksDB users prefer having the ability to switch features on and off without having to close and reopen the DB. This is particularly important if the feature causes issues and needs to be turned off. Dynamically changing a DB option flag does not seem currently possible. Moreover, with this new change, the MemPurge feature can be toggled on or off independently between column families, which we see as a major improvement. **Content of this PR** This PR includes removal of the `experimental_mempurge_threshold` flag as a DB option flag, and its re-introduction as a `MutableCFOption` flag. I updated the code to handle dynamic changes of the flag (in particular inside the `FlushJob` file). Additionally, this PR includes a new test to demonstrate the capacity of the code to toggle the MemPurge feature on and off, as well as the addition in the `db_stress` module of 2 different mempurge threshold values (0.0 and 1.0) that can be randomly changed with the `set_option_one_in` flag. This is useful to stress test the dynamic changes. **Benchmarking** I will add numbers to prove that there is no performance impact within the next 12 hours. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10011 Reviewed By: pdillinger Differential Revision: D36462357 Pulled By: bjlemaire fbshipit-source-id: 5e3d63bdadf085c0572ecc2349e7dd9729ce1802 |
2 years ago |
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Gang Liao
|
2352e2dfda |
Add the blob cache to the stress tests and the benchmarking tool (#10202)
Summary: In order to facilitate correctness and performance testing, we would like to add the new blob cache to our stress test tool `db_stress` and our continuously running crash test script `db_crashtest.py`, as well as our synthetic benchmarking tool `db_bench` and the BlobDB performance testing script `run_blob_bench.sh`. As part of this task, we would also like to utilize these benchmarking tools to get some initial performance numbers about the effectiveness of caching blobs. This PR is a part of https://github.com/facebook/rocksdb/issues/10156 Pull Request resolved: https://github.com/facebook/rocksdb/pull/10202 Reviewed By: ltamasi Differential Revision: D37325739 Pulled By: gangliao fbshipit-source-id: deb65d0d414502270dd4c324d987fd5469869fa8 |
2 years ago |
|
Peter Dillinger
|
84210c9489 |
Add data block hash index to crash test, fix MultiGet issue (#10220)
Summary: There was a bug in the MultiGet enhancement in https://github.com/facebook/rocksdb/issues/9899 with data block hash index, which was not caught because data block hash index was never added to stress tests. This change fixes both issues. Fixes https://github.com/facebook/rocksdb/issues/10186 I intend to pick this into the 7.4.0 release candidate Pull Request resolved: https://github.com/facebook/rocksdb/pull/10220 Test Plan: Failure quickly reproduces in crash test with kDataBlockBinaryAndHash, and does not seem to with the fix. Reproducing the failure with a unit test I believe would be too tricky and fragile to be worthwhile. Reviewed By: anand1976 Differential Revision: D37315647 Pulled By: pdillinger fbshipit-source-id: 9f648265bba867275edc752f7a56611a59401cba |
2 years ago |
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Andrew Kryczka
|
5d6005c780 |
Add WriteOptions::protection_bytes_per_key (#10037)
Summary: Added an option, `WriteOptions::protection_bytes_per_key`, that controls how many bytes per key we use for integrity protection in `WriteBatch`. It takes effect when `WriteBatch::GetProtectionBytesPerKey() == 0`. Currently the only supported value is eight. Invoking a user API with it set to any other nonzero value will result in `Status::NotSupported` returned to the user. There is also a bug fix for integrity protection with `inplace_callback`, where we forgot to take into account the possible change in varint length when calculating KV checksum for the final encoded buffer. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10037 Test Plan: - Manual - Set default value of `WriteOptions::protection_bytes_per_key` to eight and ran `make check -j24` - Enabled in MyShadow for 1+ week - Automated - Unit tests have a `WriteMode` that enables the integrity protection via `WriteOptions` - Crash test - in most cases, use `WriteOptions::protection_bytes_per_key` to enable integrity protection Reviewed By: cbi42 Differential Revision: D36614569 Pulled By: ajkr fbshipit-source-id: 8650087ceac9b61b560f1e5fafe5e1baf9c725fb |
2 years ago |
|
Peter Dillinger
|
126c223714 |
Remove deprecated block-based filter (#10184)
Summary: In https://github.com/facebook/rocksdb/issues/9535, release 7.0, we hid the old block-based filter from being created using the public API, because of its inefficiency. Although we normally maintain read compatibility on old DBs forever, filters are not required for reading a DB, only for optimizing read performance. Thus, it should be acceptable to remove this code and the substantial maintenance burden it carries as useful features are developed and validated (such as user timestamp). This change completely removes the code for reading and writing the old block-based filters, net removing about 1370 lines of code no longer needed. Options removed from testing / benchmarking tools. The prior existence is only evident in a couple of places: * `CacheEntryRole::kDeprecatedFilterBlock` - We can update this public API enum in a major release to minimize source code incompatibilities. * A warning is logged when an old table file is opened that used the old block-based filter. This is provided as a courtesy, and would be a pain to unit test, so manual testing should suffice. Unfortunately, sst_dump does not tell you whether a file uses block-based filter, and the structure of the code makes it very difficult to fix. * To detect that case, `kObsoleteFilterBlockPrefix` (renamed from `kFilterBlockPrefix`) for metaindex is maintained (for now). Other notes: * In some cases where numbers are associated with filter configurations, we have had to update the assigned numbers so that they all correspond to something that exists. * Fixed potential stat counting bug by assuming `filter_checked = false` for cases like `filter == nullptr` rather than assuming `filter_checked = true` * Removed obsolete `block_offset` and `prefix_extractor` parameters from several functions. * Removed some unnecessary checks `if (!table_prefix_extractor() && !prefix_extractor)` because the caller guarantees the prefix extractor exists and is compatible Pull Request resolved: https://github.com/facebook/rocksdb/pull/10184 Test Plan: tests updated, manually test new warning in LOG using base version to generate a DB Reviewed By: riversand963 Differential Revision: D37212647 Pulled By: pdillinger fbshipit-source-id: 06ee020d8de3b81260ffc36ad0c1202cbf463a80 |
2 years ago |
|
Yanqin Jin
|
ce419c0f10 |
Allow db_bench and db_stress to set `allow_data_in_errors` (#10171)
Summary: There is `Options::allow_data_in_errors` that controls whether RocksDB is allowed to log data, e.g. key, value, etc in LOG files. It is false by default. However, in db_bench and db_stress, it is often ok to log data because there is no concern about privacy. This PR allows db_stress and db_bench to set this option on the command line, while it remains false by default. Furthermore, make crash/recovery test driven by db_crashtest.py to opt-in. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10171 Test Plan: Stress test and db_bench Reviewed By: hx235 Differential Revision: D37163787 Pulled By: riversand963 fbshipit-source-id: 0242f24d292ba15b6faf8ff903963b85d3e011f8 |
2 years ago |
|
Hui Xiao
|
d665afdbf3 |
Account memory of FileMetaData in global memory limit (#9924)
Summary: **Context/Summary:** As revealed by heap profiling, allocation of `FileMetaData` for [newly created file added to a Version](https://github.com/facebook/rocksdb/pull/9924/files#diff-a6aa385940793f95a2c5b39cc670bd440c4547fa54fd44622f756382d5e47e43R774) can consume significant heap memory. This PR is to account that toward our global memory limit based on block cache capacity. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9924 Test Plan: - Previous `make check` verified there are only 2 places where the memory of the allocated `FileMetaData` can be released - New unit test `TEST_P(ChargeFileMetadataTestWithParam, Basic)` - db bench (CPU cost of `charge_file_metadata` in write and compact) - **write micros/op: -0.24%** : `TEST_TMPDIR=/dev/shm/testdb ./db_bench -benchmarks=fillseq -db=$TEST_TMPDIR -charge_file_metadata=1 (remove this option for pre-PR) -disable_auto_compactions=1 -write_buffer_size=100000 -num=4000000 | egrep 'fillseq'` - **compact micros/op -0.87%** : `TEST_TMPDIR=/dev/shm/testdb ./db_bench -benchmarks=fillseq -db=$TEST_TMPDIR -charge_file_metadata=1 -disable_auto_compactions=1 -write_buffer_size=100000 -num=4000000 -numdistinct=1000 && ./db_bench -benchmarks=compact -db=$TEST_TMPDIR -use_existing_db=1 -charge_file_metadata=1 -disable_auto_compactions=1 | egrep 'compact'` table 1 - write #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 3.9711 | 0.264408 | 3.9914 | 0.254563 | 0.5111933721 20 | 3.83905 | 0.0664488 | 3.8251 | 0.0695456 | -0.3633711465 40 | 3.86625 | 0.136669 | 3.8867 | 0.143765 | 0.5289363078 80 | 3.87828 | 0.119007 | 3.86791 | 0.115674 | **-0.2673865734** 160 | 3.87677 | 0.162231 | 3.86739 | 0.16663 | **-0.2419539978** table 2 - compact #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 2,399,650.00 | 96,375.80 | 2,359,537.00 | 53,243.60 | -1.67 20 | 2,410,480.00 | 89,988.00 | 2,433,580.00 | 91,121.20 | 0.96 40 | 2.41E+06 | 121811 | 2.39E+06 | 131525 | **-0.96** 80 | 2.40E+06 | 134503 | 2.39E+06 | 108799 | **-0.78** - stress test: `python3 tools/db_crashtest.py blackbox --charge_file_metadata=1 --cache_size=1` killed as normal Reviewed By: ajkr Differential Revision: D36055583 Pulled By: hx235 fbshipit-source-id: b60eab94707103cb1322cf815f05810ef0232625 |
2 years ago |
|
Guido Tagliavini Ponce
|
f105e1a501 |
Make the per-shard hash table fixed-size. (#10154)
Summary: We make the size of the per-shard hash table fixed. The base level of the hash table is now preallocated with the required capacity. The user must provide an estimate of the size of the values. Notice that even though the base level becomes fixed, the chains are still dynamic. Overall, the shard capacity mechanisms haven't changed, so we don't need to test this. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10154 Test Plan: `make -j24 check` Reviewed By: pdillinger Differential Revision: D37124451 Pulled By: guidotag fbshipit-source-id: cba6ac76052fe0ec60b8ff4211b3de7650e80d0c |
2 years ago |
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Yanqin Jin
|
bfaf8291c5 |
Fix a race condition in transaction stress test (#10157)
Summary: Before this PR, there can be a race condition between the thread calling `StressTest::Open()` and a background compaction thread calling `MultiOpsTxnsStressTest::VerifyPkSkFast()`. ``` Time thread1 bg_compact_thr | TransactionDB::Open(..., &txn_db_) | db_ is still nullptr | db_->GetSnapshot() // segfault | db_ = txn_db_ V ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/10157 Test Plan: CI Reviewed By: akankshamahajan15 Differential Revision: D37121653 Pulled By: riversand963 fbshipit-source-id: 6a53117f958e9ee86f77297fdeb843e5160a9331 |
2 years ago |
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Yanqin Jin
|
1777e5f7e9 |
Snapshots with user-specified timestamps (#9879)
Summary: In RocksDB, keys are associated with (internal) sequence numbers which denote when the keys are written to the database. Sequence numbers in different RocksDB instances are unrelated, thus not comparable. It is nice if we can associate sequence numbers with their corresponding actual timestamps. One thing we can do is to support user-defined timestamp, which allows the applications to specify the format of custom timestamps and encode a timestamp with each key. More details can be found at https://github.com/facebook/rocksdb/wiki/User-defined-Timestamp-%28Experimental%29. This PR provides a different but complementary approach. We can associate rocksdb snapshots (defined in https://github.com/facebook/rocksdb/blob/7.2.fb/include/rocksdb/snapshot.h#L20) with **user-specified** timestamps. Since a snapshot is essentially an object representing a sequence number, this PR establishes a bi-directional mapping between sequence numbers and timestamps. In the past, snapshots are usually taken by readers. The current super-version is grabbed, and a `rocksdb::Snapshot` object is created with the last published sequence number of the super-version. You can see that the reader actually has no good idea of what timestamp to assign to this snapshot, because by the time the `GetSnapshot()` is called, an arbitrarily long period of time may have already elapsed since the last write, which is when the last published sequence number is written. This observation motivates the creation of "timestamped" snapshots on the write path. Currently, this functionality is exposed only to the layer of `TransactionDB`. Application can tell RocksDB to create a snapshot when a transaction commits, effectively associating the last sequence number with a timestamp. It is also assumed that application will ensure any two snapshots with timestamps should satisfy the following: ``` snapshot1.seq < snapshot2.seq iff. snapshot1.ts < snapshot2.ts ``` If the application can guarantee that when a reader takes a timestamped snapshot, there is no active writes going on in the database, then we also allow the user to use a new API `TransactionDB::CreateTimestampedSnapshot()` to create a snapshot with associated timestamp. Code example ```cpp // Create a timestamped snapshot when committing transaction. txn->SetCommitTimestamp(100); txn->SetSnapshotOnNextOperation(); txn->Commit(); // A wrapper API for convenience Status Transaction::CommitAndTryCreateSnapshot( std::shared_ptr<TransactionNotifier> notifier, TxnTimestamp ts, std::shared_ptr<const Snapshot>* ret); // Create a timestamped snapshot if caller guarantees no concurrent writes std::pair<Status, std::shared_ptr<const Snapshot>> snapshot = txn_db->CreateTimestampedSnapshot(100); ``` The snapshots created in this way will be managed by RocksDB with ref-counting and potentially shared with other readers. We provide the following APIs for readers to retrieve a snapshot given a timestamp. ```cpp // Return the timestamped snapshot correponding to given timestamp. If ts is // kMaxTxnTimestamp, then we return the latest timestamped snapshot if present. // Othersise, we return the snapshot whose timestamp is equal to `ts`. If no // such snapshot exists, then we return null. std::shared_ptr<const Snapshot> TransactionDB::GetTimestampedSnapshot(TxnTimestamp ts) const; // Return the latest timestamped snapshot if present. std::shared_ptr<const Snapshot> TransactionDB::GetLatestTimestampedSnapshot() const; ``` We also provide two additional APIs for stats collection and reporting purposes. ```cpp Status TransactionDB::GetAllTimestampedSnapshots( std::vector<std::shared_ptr<const Snapshot>>& snapshots) const; // Return timestamped snapshots whose timestamps fall in [ts_lb, ts_ub) and store them in `snapshots`. Status TransactionDB::GetTimestampedSnapshots( TxnTimestamp ts_lb, TxnTimestamp ts_ub, std::vector<std::shared_ptr<const Snapshot>>& snapshots) const; ``` To prevent the number of timestamped snapshots from growing infinitely, we provide the following API to release timestamped snapshots whose timestamps are older than or equal to a given threshold. ```cpp void TransactionDB::ReleaseTimestampedSnapshotsOlderThan(TxnTimestamp ts); ``` Before shutdown, RocksDB will release all timestamped snapshots. Comparison with user-defined timestamp and how they can be combined: User-defined timestamp persists every key with a timestamp, while timestamped snapshots maintain a volatile mapping between snapshots (sequence numbers) and timestamps. Different internal keys with the same user key but different timestamps will be treated as different by compaction, thus a newer version will not hide older versions (with smaller timestamps) unless they are eligible for garbage collection. In contrast, taking a timestamped snapshot at a certain sequence number and timestamp prevents all the keys visible in this snapshot from been dropped by compaction. Here, visible means (seq < snapshot and most recent). The timestamped snapshot supports the semantics of reading at an exact point in time. Timestamped snapshots can also be used with user-defined timestamp. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9879 Test Plan: ``` make check TEST_TMPDIR=/dev/shm make crash_test_with_txn ``` Reviewed By: siying Differential Revision: D35783919 Pulled By: riversand963 fbshipit-source-id: 586ad905e169189e19d3bfc0cb0177a7239d1bd4 |
2 years ago |
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Yanqin Jin
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f890527b16 |
Update test for secondary instance in stress test (#10121)
Summary: This PR updates secondary instance testing in stress test by default. A background thread will be started (disabled by default), running a secondary instance tailing the logs of the primary. Periodically (every 1 sec), this thread calls `TryCatchUpWithPrimary()` and uses point lookup or range scan to read some random keys with only very basic verification to make sure no assertion failure is triggered. Thanks to https://github.com/facebook/rocksdb/issues/10061 , we can enable secondary instance when user-defined timestamp is enabled. Also removed a less useful test configuration, `secondary_catch_up_one_in`. This is very similar to the periodic catch-up. In the last commit, I decided not to enable it now, but just update the tests, since secondary instance does not work well when the underlying file is renamed by primary, e.g. SstFileManager. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10121 Test Plan: ``` TEST_TMPDIR=/dev/shm/rocksdb make crash_test TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_ts TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_atomic_flush ``` Reviewed By: ajkr Differential Revision: D36939458 Pulled By: riversand963 fbshipit-source-id: 1c065b7efc3690fc341569b9d369a5cbd8ef6b3e |
2 years ago |
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Gang Liao
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e6432dfd4c |
Make it possible to enable blob files starting from a certain LSM tree level (#10077)
Summary: Currently, if blob files are enabled (i.e. `enable_blob_files` is true), large values are extracted both during flush/recovery (when SST files are written into level 0 of the LSM tree) and during compaction into any LSM tree level. For certain use cases that have a mix of short-lived and long-lived values, it might make sense to support extracting large values only during compactions whose output level is greater than or equal to a specified LSM tree level (e.g. compactions into L1/L2/... or above). This could reduce the space amplification caused by large values that are turned into garbage shortly after being written at the price of some write amplification incurred by long-lived values whose extraction to blob files is delayed. In order to achieve this, we would like to do the following: - Add a new configuration option `blob_file_starting_level` (default: 0) to `AdvancedColumnFamilyOptions` (and `MutableCFOptions` and extend the related logic) - Instantiate `BlobFileBuilder` in `BuildTable` (used during flush and recovery, where the LSM tree level is L0) and `CompactionJob` iff `enable_blob_files` is set and the LSM tree level is `>= blob_file_starting_level` - Add unit tests for the new functionality, and add the new option to our stress tests (`db_stress` and `db_crashtest.py` ) - Add the new option to our benchmarking tool `db_bench` and the BlobDB benchmark script `run_blob_bench.sh` - Add the new option to the `ldb` tool (see https://github.com/facebook/rocksdb/wiki/Administration-and-Data-Access-Tool) - Ideally extend the C and Java bindings with the new option - Update the BlobDB wiki to document the new option. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10077 Reviewed By: ltamasi Differential Revision: D36884156 Pulled By: gangliao fbshipit-source-id: 942bab025f04633edca8564ed64791cb5e31627d |
2 years ago |
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Gang Liao
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3dc6ebaf74 |
Support specifying blob garbage collection parameters when CompactRange() (#10073)
Summary: Garbage collection is generally controlled by the BlobDB configuration options `enable_blob_garbage_collection` and `blob_garbage_collection_age_cutoff`. However, there might be use cases where we would want to temporarily override these options while performing a manual compaction. (One use case would be doing a full key-space manual compaction with full=100% garbage collection age cutoff in order to minimize the space occupied by the database.) Our goal here is to make it possible to override the configured GC parameters when using the `CompactRange` API to perform manual compactions. This PR would involve: - Extending the `CompactRangeOptions` structure so clients can both force-enable and force-disable GC, as well as use a different cutoff than what's currently configured - Storing whether blob GC should actually be enabled during a certain manual compaction and the cutoff to use in the `Compaction` object (considering the above overrides) and passing it to `CompactionIterator` via `CompactionProxy` - Updating the BlobDB wiki to document the new options. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10073 Test Plan: Adding unit tests and adding the new options to the stress test tool. Reviewed By: ltamasi Differential Revision: D36848700 Pulled By: gangliao fbshipit-source-id: c878ef101d1c612429999f513453c319f75d78e9 |
2 years ago |
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Guido Tagliavini Ponce
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b4d0e041d0 |
Add support for FastLRUCache in stress and crash tests. (#10081)
Summary: Stress tests can run with the experimental FastLRUCache. Crash tests randomly choose between LRUCache and FastLRUCache. Since only LRUCache supports a secondary cache, we validate the `--secondary_cache_uri` and `--cache_type` flags---when `--secondary_cache_uri` is set, the `--cache_type` is set to `lru_cache`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10081 Test Plan: - To test that the FastLRUCache is used and the stress test runs successfully, run `make -j24 CRASH_TEST_EXT_ARGS=—duration=960 blackbox_crash_test_with_atomic_flush`. The cache type should sometimes be `fast_lru_cache`. - To test the flag validation, run `make -j24 CRASH_TEST_EXT_ARGS="--duration=960 --secondary_cache_uri=x" blackbox_crash_test_with_atomic_flush` multiple times. The test will always be aborted (which is okay). Check that the cache type is always `lru_cache`. Reviewed By: anand1976 Differential Revision: D36839908 Pulled By: guidotag fbshipit-source-id: ebcdfdcd12ec04c96c09ae5b9c9d1e613bdd1725 |
2 years ago |
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Yanqin Jin
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9901e7f681 |
Enable checkpoint and backup in db_stress when timestamp is enabled (#10047)
Summary: After https://github.com/facebook/rocksdb/issues/10030 and https://github.com/facebook/rocksdb/issues/10004, we can enable checkpoint and backup in stress tests when user-defined timestamp is enabled. This PR has no production risk. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10047 Test Plan: ``` TEST_TMPDIR=/dev/shm make crash_test_with_ts ``` Reviewed By: jowlyzhang Differential Revision: D36641565 Pulled By: riversand963 fbshipit-source-id: d86c9d87efcc34c32d1aa176af691d32b897644a |
3 years ago |
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Changyu Bi
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cc23b46da1 |
Support using ZDICT_finalizeDictionary to generate zstd dictionary (#9857)
Summary:
An untrained dictionary is currently simply the concatenation of several samples. The ZSTD API, ZDICT_finalizeDictionary(), can improve such a dictionary's effectiveness at low cost. This PR changes how dictionary is created by calling the ZSTD ZDICT_finalizeDictionary() API instead of creating raw content dictionary (when max_dict_buffer_bytes > 0), and pass in all buffered uncompressed data blocks as samples.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9857
Test Plan:
#### db_bench test for cpu/memory of compression+decompression and space saving on synthetic data:
Set up: change the parameter [here](
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3 years ago |
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Jay Zhuang
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c6d326d3d7 |
Track SST unique id in MANIFEST and verify (#9990)
Summary: Start tracking SST unique id in MANIFEST, which is used to verify with SST properties to make sure the SST file is not overwritten or misplaced. A DB option `try_verify_sst_unique_id` is introduced to enable/disable the verification, if enabled, it opens all SST files during DB-open to read the unique_id from table properties (default is false), so it's recommended to use it with `max_open_files = -1` to pre-open the files. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9990 Test Plan: unittests, format-compatible test, mini-crash Reviewed By: anand1976 Differential Revision: D36381863 Pulled By: jay-zhuang fbshipit-source-id: 89ea2eb6b35ed3e80ead9c724eb096083eaba63f |
3 years ago |
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Yanqin Jin
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e3a3dbf2be |
Avoid overwriting options loaded from OPTIONS (#9943)
Summary: This is similar to https://github.com/facebook/rocksdb/issues/9862, including the following fixes/refactoring: 1. If OPTIONS file is specified via `-options_file`, majority of options will be loaded from the file. We should not overwrite options that have been loaded from the file. Instead, we configure only fields of options which are shared objects and not set by the OPTIONS file. We also configure a few fields, e.g. `create_if_missing` necessary for stress test to run. 2. Refactor options initialization into three functions, `InitializeOptionsFromFile()`, `InitializeOptionsFromFlags()` and `InitializeOptionsGeneral()` similar to db_bench. I hope they can be shared in the future. The high-level logic is as follows: ```cpp if (!InitializeOptionsFromFile(...)) { InitializeOptionsFromFlags(...); } InitializeOptionsGeneral(...); ``` 3. Currently, the setting for `block_cache_compressed` does not seem correct because it by default specifies a size of `numeric_limits<size_t>::max()` ((size_t)-1). According to code comments, `-1` indicates default value, which should be referring to `num_shard_bits` argument. 4. Clarify `fail_if_options_file_error`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9943 Test Plan: 1. make check 2. Run stress tests, and manually check generated OPTIONS file and compare them with input OPTIONS files Reviewed By: jay-zhuang Differential Revision: D36133769 Pulled By: riversand963 fbshipit-source-id: 35dacdc090a0a72c922907170cd132b9ecaa073e |
3 years ago |