Summary:
Currently the point lookup values are copied to a string provided by the user.
This incures an extra memcpy cost. This patch allows doing point lookup
via a PinnableSlice which pins the source memory location (instead of
copying their content) and releases them after the content is consumed
by the user. The old API of Get(string) is translated to the new API
underneath.
Here is the summary for improvements:
1. value 100 byte: 1.8% regular, 1.2% merge values
2. value 1k byte: 11.5% regular, 7.5% merge values
3. value 10k byte: 26% regular, 29.9% merge values
The improvement for merge could be more if we extend this approach to
pin the merge output and delay the full merge operation until the user
actually needs it. We have put that for future work.
PS:
Sometimes we observe a small decrease in performance when switching from
t5452014 to this patch but with the old Get(string) API. The difference
is a little and could be noise. More importantly it is safely
cancelled
Closes https://github.com/facebook/rocksdb/pull/1732
Differential Revision: D4374613
Pulled By: maysamyabandeh
fbshipit-source-id: a077f1a
Summary:
When deletion-collapsing mode is enabled (i.e., for DBIter/CompactionIterator), we maintain position in the tombstone maps across calls to ShouldDelete(). Since iterators often access keys sequentially (or reverse-sequentially), scanning forward/backward from the last position can be faster than binary-searching the map for every key.
- When Next() is invoked on an iterator, we use kForwardTraversal to scan forwards, if needed, until arriving at the range deletion containing the next key.
- Similarly for Prev(), we use kBackwardTraversal to scan backwards in the range deletion map.
- When the iterator seeks, we use kBinarySearch for repositioning
- After tombstones are added or before the first ShouldDelete() invocation, the current position is set to invalid, which forces kBinarySearch to be used.
- Non-iterator users (i.e., Get()) use kFullScan, which has the same behavior as before---scan the whole map for every key passed to ShouldDelete().
Closes https://github.com/facebook/rocksdb/pull/1701
Differential Revision: D4350318
Pulled By: ajkr
fbshipit-source-id: 5129b76
Summary:
?tion
Add flags in db_bench to test with block cache mid-point insertion.
Also update sst_dump to dump total block sizes of each type. I find it
useful to look at these test db stats and I don't know if we have them
elsewhere.
Closes https://github.com/facebook/rocksdb/pull/1706
Differential Revision: D4355812
Pulled By: yiwu-arbug
fbshipit-source-id: 3e4a348
Summary:
This fix the issue with tests failing under GCC 481, I am not sure what is the exact reason
Closes https://github.com/facebook/rocksdb/pull/1735
Differential Revision: D4374094
Pulled By: IslamAbdelRahman
fbshipit-source-id: b3625bc
Summary:
#1733 started using SizeFileBytes(), so our dummy log file implementation should stop asserting that this function isn't called.
Closes https://github.com/facebook/rocksdb/pull/1740
Differential Revision: D4376055
Pulled By: ajkr
fbshipit-source-id: 2854d89
Summary:
Since the backup work as snapshot, we should only copy
the bytes of the wal while we get the alive files.
Closes https://github.com/facebook/rocksdb/pull/1733
Differential Revision: D4373457
Pulled By: ajkr
fbshipit-source-id: 389318f
Summary:
Cleanable objects will perform the registered cleanups when
they are destructed. We however rather to delay this cleaning like when
we are gathering the merge operands. Current approach is to create the
Cleanable object on heap (instead of on stack) and delay deleting it.
By allowing Cleanables to delegate their cleanups to another cleanable
object we can delay the cleaning without however the need to craete the
cleanable object on heap and keeping it around. This patch applies this
technique for the cleanups of BlockIter and shows improved performance
for some in-memory benchmarks:
+1.8% for merge worklaod, +6.4% for non-merge workload when the merge
operator is specified.
https://our.intern.facebook.com/intern/tasks?t=15168163
Non-merge benchmark:
TEST_TMPDIR=/dev/shm/v100nocomp/ ./db_bench --benchmarks=fillrandom
--num=1000000 -value_size=100 -compression_type=none
Reading random with no merge operator specified:
TEST_TMPDIR=/dev/shm/v100nocomp/ ./db_bench
--benchmarks="read
Closes https://github.com/facebook/rocksdb/pull/1711
Differential Revision: D4361163
Pulled By: maysamyabandeh
fbshipit-source-id: 9801e07
Summary:
Add `fadvise_trigger` option to `SstFileWriter`
If fadvise_trigger is passed with a non-zero value, SstFileWriter will invalidate the os page cache every `fadvise_trigger` bytes for the sst file
Closes https://github.com/facebook/rocksdb/pull/1731
Differential Revision: D4371246
Pulled By: IslamAbdelRahman
fbshipit-source-id: 91caff1
Summary:
File copying happens when creating checkpoints and bulkloading files from different FS partition. We should fsync the files when copying them to guarantee durability. A side effect will be that the dirty pages in file system buffers won't grow too large.
Closes https://github.com/facebook/rocksdb/pull/1728
Differential Revision: D4371083
Pulled By: siying
fbshipit-source-id: 579e14c
Summary:
std::unique(beg, end) returns an iterator of unique_end, data behind unique_end should not be accessed.
Closes https://github.com/facebook/rocksdb/pull/1726
Differential Revision: D4371076
Pulled By: IslamAbdelRahman
fbshipit-source-id: 5564450
Summary:
If 2PC is enabled, checkpoint may not copy previous log files that contain uncommitted prepare records. In this diff we keep those files.
Closes https://github.com/facebook/rocksdb/pull/1724
Differential Revision: D4368319
Pulled By: siying
fbshipit-source-id: cc2c746
Summary:
To support scenarios where we want all instances of `Mutex` be adaptive
we're adding a conditional `#define` so that the desired behavior can be
easily enabled.
Closes https://github.com/facebook/rocksdb/pull/1710
Differential Revision: D4359863
Pulled By: gunnarku
fbshipit-source-id: 2f1e2f8
Summary:
Improve cache options logging to info log.
Also print the value of
cache_index_and_filter_blocks_with_high_priority.
Closes https://github.com/facebook/rocksdb/pull/1709
Differential Revision: D4358776
Pulled By: yiwu-arbug
fbshipit-source-id: 8f030a0
Summary:
addfile phase in c_test could fail because in previous steps we did a DeleteRange.
Fix the test by simply moving the addfile phase before DeleteRange
Closes https://github.com/facebook/rocksdb/pull/1672
Differential Revision: D4328896
Pulled By: IslamAbdelRahman
fbshipit-source-id: 1d946df
Summary:
In persistent_cache/block_cache_tier.cc, timers are never restarted, so the latency measured is not correct.
Closes https://github.com/facebook/rocksdb/pull/1707
Differential Revision: D4355828
Pulled By: siying
fbshipit-source-id: cd5f9e1
Summary:
The address of the array of string pointers is returned as the function result of backtrace_symbols(). This array is malloced by backtrace_symbols(), and must be freed by the caller.
Closes https://github.com/facebook/rocksdb/pull/1692
Differential Revision: D4355737
Pulled By: IslamAbdelRahman
fbshipit-source-id: 5742035
Summary:
apt-get fail to fetch gflags and seems it is in fact not needed.
Closes https://github.com/facebook/rocksdb/pull/1705
Differential Revision: D4354555
Pulled By: yiwu-arbug
fbshipit-source-id: b68fee3
Summary:
We are passing a string as diff_id which make conduit call fail
```
$ echo '{"diff_id": "20982117", "name":"click here for sandcastle tests for D20982117", "link":"https://our.intern.facebook.com/intern/sandcastle/1984718793/"}' | arc call-conduit differential.updateunitresults
{"error":"ERR-CONDUIT-CORE","errorMessage":"ERR-CONDUIT-CORE: Argument 1 passed to EntDiffPropertiesUpdateMutationBuilder::setDiffNumber() must be an instance of int, string given","response":null}
```
fix it by removing double quotes
Closes https://github.com/facebook/rocksdb/pull/1700
Differential Revision: D4350227
Pulled By: IslamAbdelRahman
fbshipit-source-id: b4504af
Summary:
Added a tombstone-collapsing mode to RangeDelAggregator, which eliminates overlap in the TombstoneMap. In this mode, we can check whether a tombstone covers a user key using upper_bound() (i.e., binary search). However, the tradeoff is the overhead to add tombstones is now higher, so at first I've only enabled it for range scans (compaction/flush/user iterators), where we expect a high number of calls to ShouldDelete() for the same tombstones. Point queries like Get() will still use the linear scan approach.
Also in this diff I changed RangeDelAggregator's TombstoneMap to use multimap with user keys instead of map with internal keys. Callers sometimes provided ParsedInternalKey directly, from which it would've required string copying to derive an internal key Slice with which we could search the map.
Closes https://github.com/facebook/rocksdb/pull/1614
Differential Revision: D4270397
Pulled By: ajkr
fbshipit-source-id: 93092c7
Summary:
Add the parameter in db_bench to help users to measure latency histogram with constant read rate.
Closes https://github.com/facebook/rocksdb/pull/1683
Differential Revision: D4341387
Pulled By: siying
fbshipit-source-id: 1b4b276
Summary:
As suggested by testn in #1650
The Add is at the end of the function. Having a fallthough
will result in it being added twice.
Closes https://github.com/facebook/rocksdb/pull/1676
Differential Revision: D4331906
Pulled By: yiwu-arbug
fbshipit-source-id: 895c4a0
Summary:
add a new function to SstFileWriter that will tell the user how big is there file right now.
Closes https://github.com/facebook/rocksdb/pull/1686
Differential Revision: D4338868
Pulled By: mdyuki1016
fbshipit-source-id: c1ee16a
Summary:
seems it's expensive to check status since the underlying merge iterator checks status of all its children. so only do it when it's really necessary to get the status before invoking Next(), i.e., when we're advancing to get the first key in the next file.
Closes https://github.com/facebook/rocksdb/pull/1691
Differential Revision: D4343446
Pulled By: siying
fbshipit-source-id: 70ab315
Summary:
?e_file_max_buffer_size)
If we overwrite WritableFile and has a buffer which has the same
function of buf_. We hope remove the cache function of
WritableFileWriter. So using options.writable_file_max_buffer_size = 0
to disable cache function.
Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
Closes https://github.com/facebook/rocksdb/pull/1628
Differential Revision: D4307219
Pulled By: yiwu-arbug
fbshipit-source-id: 77a6e26
Summary:
Update clang-format script to format diff since last commit from master,
instead of just last commit. In our common workflow we usually endup
with multiple commits for a single PR. This change make it easier to
format all stacking changes.
Closes https://github.com/facebook/rocksdb/pull/1684
Differential Revision: D4340597
Pulled By: yiwu-arbug
fbshipit-source-id: c18949e
Summary:
Fixes compile error:
In file included from ./util/statistics.h:17:0,
from ./util/stop_watch.h:8,
from ./util/perf_step_timer.h:9,
from ./util/iostats_context_imp.h:8,
from ./util/posix_logger.h:27,
from ./port/util_logger.h:18,
from ./db/auto_roll_logger.h:15,
from db/auto_roll_logger.cc:6:
./util/thread_local.h:65:16: error: 'function' in namespace 'std' does not name a template type
typedef std::function<void(void*, void*)> FoldFunc;
Closes https://github.com/facebook/rocksdb/pull/1656
Differential Revision: D4318702
Pulled By: yiwu-arbug
fbshipit-source-id: 8c5d17a
Summary:
Iterator should be in corrupted status if merge operator return false.
Also add test to make sure if max_successive_merges is hit during write,
data will not be lost.
Closes https://github.com/facebook/rocksdb/pull/1665
Differential Revision: D4322695
Pulled By: yiwu-arbug
fbshipit-source-id: b327b05
Summary:
Previously:
$ make format
Makefile:104: Warning: Compiling in debug mode. Don't use the resulting binary in production
build_tools/format-diff.sh
You didn't have clang-format-diff.py available in your computer!
You can download it by running:
curl http://goo.gl/iUW1u2
Makefile:868: recipe for target 'format' failed
make: *** [format] Error 128
$ curl http://goo.gl/iUW1u2 > ~/bin/clang-format-diff.py
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 276 0 276 0 0 148 0 --:--:-- 0:00:01 --:--:-- 148m
$ more ~/bin/clang-format-diff.py
<HTML>
<HEAD>
<TITLE>Moved Permanently</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Moved Permanently</H1>
The document has moved <A HREF="https://raw.github.com/leaningtech/duetto-clang/master/tools/clang-format/clang-format-diff.py">here</A>.
</BODY>
</HTML>
Closes https://github.com/facebook/rocksdb/pull/1680
Differential Revision: D4338495
Pulled By: yiwu-arbug
fbshipit-source-id: e2b24d8
Summary:
hopefully the last of the gcc-7 compile errors
Closes https://github.com/facebook/rocksdb/pull/1675
Differential Revision: D4332106
Pulled By: IslamAbdelRahman
fbshipit-source-id: 139448c
Summary:
fixes error (that occurred on gcc-7):
error:
util/env_basic_test.cc: In member function 'virtual rocksdb::Status rocksdb::NormalizingEnvWrapper::GetChildren(const string&, std::vector<std::__cxx11::basic_string<char> >*)':
util/env_basic_test.cc:27:21: error: 'remove_if' is not a member of 'std'
result->erase(std::remove_if(result->begin(), result->end(),
^~~
Closes https://github.com/facebook/rocksdb/pull/1674
Differential Revision: D4331221
Pulled By: ajkr
fbshipit-source-id: 9bbdc78
Summary:
We used to treat any failure to read a backup's meta-file as if the backup were corrupted; however, we should distinguish corruption errors from errors in the backup Env. This fixes an issue where callers would get inconsistent results from GetBackupInfo() if they called it on an engine that encountered Env error during initialization. Now we fail Initialize() in this case so callers cannot invoke GetBackupInfo() on such engines.
Closes https://github.com/facebook/rocksdb/pull/1654
Differential Revision: D4318573
Pulled By: ajkr
fbshipit-source-id: f7a7c54
Summary:
Include a dump of user_collected_properties in sst_dump
Closes https://github.com/facebook/rocksdb/pull/1668
Differential Revision: D4325078
Pulled By: IslamAbdelRahman
fbshipit-source-id: 226b6d6
Summary:
"examples/c_simple_example.c" did not have a proper copyright header.
Closes https://github.com/facebook/rocksdb/pull/1670
Differential Revision: D4327445
Pulled By: yiwu-arbug
fbshipit-source-id: a70389e
Maysam Yabandeh