rocksdb

Commit Graph

Author	SHA1	Message	Date
Nikhil Benesch	c0208dffbe	arena: derive alignment unit from std::max_align_t Summary: As raised in #2265, the arena allocator will return memory that is improperly aligned to store a `std::function` on macOS. Oddly, I'm unable to tickle this bug without adding a `std::function` field to `struct ReadOptions`—but my proposal in #2265 does exactly that. In any case, here's a simple reproduction. Apply this bogus patch to get a `std::function` into `struct ReadOptions` ``` --- a/include/rocksdb/options.h +++ b/include/rocksdb/options.h @@ -1035,6 +1035,8 @@ struct ReadOptions { // Default: 0 uint64_t max_skippable_internal_keys; + std::function<void()> foo; + ReadOptions(); ReadOptions(bool cksum, bool cache); }; ``` then compile `db_properties_test` with ubsan and run `ReadLatencyHistogramByLevel`: ``` $ make COMPILE_WITH_UBSAN=1 db_properties_test $ ./db_properties_test --gtest_filter=DBPropertiesTest.ReadLatencyHistogramByLevel ``` ubsan will complain about several misaligned accesses: ``` Note: Google Test filter = DBPropertiesTest.ReadLatencyHistogramByLevel [==========] Running 1 test from 1 test case. [----------] Global test environment set-up. [----------] 1 test from DBPropertiesTest [ RUN ] DBPropertiesTest.ReadLatencyHistogramByLevel util/coding.h:372:12: runtime error: load of misaligned address 0x00010d85516c for type 'const unsigned long', which requires 8 byte alignment 0x00010d85516c: note: pointer points here 01 00 34 57 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 78 24 82 0a 01 00 00 00 ^ util/coding.h:362:3: runtime error: store to misaligned address 0x7fff5733fac4 for type 'unsigned long', which requires 8 byte alignment 0x7fff5733fac4: note: pointer points here 01 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 1d 96 0d 01 00 00 00 ^ util/coding.h:372:12: runtime error: load of misaligned address 0x00010d85516c for type 'const unsigned long', which requires 8 byte alignment 0x00010d85516c: note: pointer points here 01 00 34 57 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 78 24 82 0a 01 00 00 00 ^ version_set.cc:854: runtime error: constructor call on misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ version_set.cc:512: runtime error: constructor call on misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ version_set.cc:505: runtime error: constructor call on misaligned address 0x00010dbfa5e8 for type 'rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ options.h:931: runtime error: constructor call on misaligned address 0x00010dbfa5e8 for type 'rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ options.h:931: runtime error: constructor call on misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ functional:1583: runtime error: constructor call on misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1585:9: runtime error: member access within misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1585:9: runtime error: store to misaligned address 0x00010dbfa648 for type '__base ' (aka '__base<void ()> '), which requires 16 byte alignment 0x00010dbfa648: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/version_set.cc:864:29: runtime error: upcast of misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:521:12: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:521:12: runtime error: load of misaligned address 0x00010dbfa5d8 for type 'rocksdb::TableCache ', which requires 16 byte alignment 0x00010dbfa5d8: note: pointer points here 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 ^ db/version_set.cc:522:9: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:522:9: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/version_set.cc:522:24: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:522:38: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:522:57: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:522:57: runtime error: load of misaligned address 0x00010dbfa678 for type 'rocksdb::RangeDelAggregator ', which requires 16 byte alignment 0x00010dbfa678: note: pointer points here 01 00 00 00 d0 a1 bf 0d 01 00 00 00 00 00 00 00 00 00 00 00 f8 db 70 0a 01 00 00 00 00 00 00 00 ^ db/version_set.cc:523:54: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:523:54: runtime error: load of misaligned address 0x00010dbfa668 for type 'rocksdb::HistogramImpl ', which requires 16 byte alignment 0x00010dbfa668: note: pointer points here 01 00 00 00 c8 88 a5 0d 01 00 00 00 00 00 00 00 01 00 00 00 d0 a1 bf 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:524:9: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:524:47: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:524:62: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/table_cache.cc:228:33: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ table/block_based_table_reader.cc:1554:41: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ table/block_based_table_reader.cc:1396:21: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ include/rocksdb/options.h:931:8: runtime error: reference binding to misaligned address 0x00010dbfa628 for type 'const std::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1584:13: runtime error: load of misaligned address 0x00010dbfa648 for type '__base const' (aka '__base<void ()> const'), which requires 16 byte alignment 0x00010dbfa648: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c8 a5 97 0d 01 00 00 00 38 36 9b 0d ^ table/block_based_table_reader.cc:1555:24: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/table_cache.cc:244:54: runtime error: load of misaligned address 0x00010dbfa618 for type 'const bool', which requires 16 byte alignment 0x00010dbfa618: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/table_cache.cc:246:49: runtime error: reference binding to misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/version_set.cc:532:12: runtime error: member access within misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ db/version_set.cc:532:12: runtime error: member access within misaligned address 0x00010dbfa5e8 for type 'const rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ db/version_set.cc:532:26: runtime error: load of misaligned address 0x00010dbfa5f8 for type 'const rocksdb::Slice const', which requires 16 byte alignment 0x00010dbfa5f8: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ version_set.cc:493: runtime error: member call on misaligned address 0x00010dbfa5c8 for type 'rocksdb::(anonymous namespace)::LevelFileIteratorState', which requires 16 byte alignment 0x00010dbfa5c8: note: pointer points here 00 00 00 00 a0 db 70 0a 01 00 00 00 00 00 00 00 00 00 00 00 90 14 98 0d 01 00 00 00 00 00 00 00 ^ version_set.cc:493: runtime error: member call on misaligned address 0x00010dbfa5e8 for type 'rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ options.h:931: runtime error: member call on misaligned address 0x00010dbfa5e8 for type 'rocksdb::ReadOptions', which requires 16 byte alignment 0x00010dbfa5e8: note: pointer points here 00 00 00 00 01 01 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ options.h:931: runtime error: member call on misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ functional:1765: runtime error: member call on misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1766:9: runtime error: member access within misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1766:9: runtime error: load of misaligned address 0x00010dbfa648 for type '__base ' (aka '__base<void ()> '), which requires 16 byte alignment 0x00010dbfa648: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c8 a5 97 0d 01 00 00 00 38 36 9b 0d ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1766:27: runtime error: member access within misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1768:14: runtime error: member access within misaligned address 0x00010dbfa628 for type 'std::__1::function<void ()>', which requires 16 byte alignment 0x00010dbfa628: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1768:14: runtime error: load of misaligned address 0x00010dbfa648 for type '__base ' (aka '__base<void ()> '), which requires 16 byte alignment 0x00010dbfa648: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c8 a5 97 0d 01 00 00 00 38 36 9b 0d ^ [ OK ] DBPropertiesTest.ReadLatencyHistogramByLevel (1599 ms) [----------] 1 test from DBPropertiesTest (1599 ms total) [----------] Global test environment tear-down [==========] 1 test from 1 test case ran. (1599 ms total) [ PASSED ] 1 test. ``` So it seems the root cause is that the internal implementation of `std::function` on macOS (and perhaps with libc++ generally?) requires 16-byte aligned memory, but the arena allocator only guarantees that the returned memory will be `sizeof(void)` aligned, which is only 8-byte alignment on my machine. This patch solves the problem by adjusting the allocator to derive the necessary alignment from `alignof(std::max_align_t)`, which is properly 16 bytes on my machine. As I mentioned in #2265, none of RocksDB's tests will cause this unaligned access to actually abort the process, but, on macOS, linking CockroachDB against a version of RocksDB with the above patch and letting it run for just a few seconds will cause a SIGABRT. ``` Process 19792 stopped thread #2, stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) frame #0: 0x0000000004f5e78f cockroach`DBNewIter + 95 cockroach`DBNewIter: -> 0x4f5e78f <+95>: callq 0x28(%rax) 0x4f5e792 <+98>: jmp 0x4f5e79e ; <+110> 0x4f5e794 <+100>: movq -0x50(%rbp), %rcx 0x4f5e798 <+104>: movq %rax, %rdi (lldb) bt thread #2, stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x0000000004f5e78f cockroach`DBNewIter + 95 ``` I'd get you a backtrace, but [Go doesn't include cgo debug information on macOS](https://github.com/golang/go/issues/6942). I've also tried building against libc++ on Linux, where debug information would be available, but I can't seem to trigger the bug there. In any case, this PR both fixes the segfault in CockroachDB and fixes the warnings reported by ubsan. Closes https://github.com/facebook/rocksdb/pull/2347 Differential Revision: D5108596 Pulled By: yiwu-arbug fbshipit-source-id: bd5e4323b2ce915ed4fe78e123cb8996aec75a00	7 years ago
Changli Gao	b8cea7cc27	VersionBuilder: Erase with iterators for better performance Summary: Closes https://github.com/facebook/rocksdb/pull/3007 Differential Revision: D6077701 Pulled By: yiwu-arbug fbshipit-source-id: a6fd5b8a23f4feb1660b9ce027f651a7e90352b3	7 years ago
codeeply	f7843f30a8	Move ~Comparator define to comparator.h Summary: When I impl my own comparator, and build in release mode. The following compile error occurs. undefined reference to `typeinfo for rocksdb::Comparator' This fix allows users build with RTTI off when has their own comparator. Closes https://github.com/facebook/rocksdb/pull/3008 Differential Revision: D6077354 Pulled By: yiwu-arbug fbshipit-source-id: 914c26dbab72f0ad1f0e15f8666a3fb2f10bfed8	7 years ago
Yi Wu	8e63cad078	fix lite build Summary: * make `checksum_type_string_map` available for lite * comment out `FilesPerLevel` in lite mode. * travis and legocastle lite build also build `all` target and run tests Closes https://github.com/facebook/rocksdb/pull/3015 Differential Revision: D6069822 Pulled By: yiwu-arbug fbshipit-source-id: 9fe92ac220e711e9e6ed4e921bd25ef4314796a0	7 years ago
Andrew Kryczka	731895214b	db_bench randomtransaction print throughput Summary: print throughput in MB/s upon finishing randomtransaction benchmark Closes https://github.com/facebook/rocksdb/pull/3016 Differential Revision: D6070426 Pulled By: ajkr fbshipit-source-id: 69df43beed4c374a36d826e761ca3a83e1fdcbf5	7 years ago
Yi Wu	60c09f5fbb	print more table_options to info log Summary: print more table_options to info log Closes https://github.com/facebook/rocksdb/pull/3003 Differential Revision: D6054490 Pulled By: yiwu-arbug fbshipit-source-id: 8e6f96e08bdc906077b6c62ade419d7cb739110f	7 years ago
Yi Wu	10ba50e9eb	Blob DB: Move BlobFile definition to a separate file Summary: simply move BlobFile definition from blob_db_impl.h to blob_file.h. Closes https://github.com/facebook/rocksdb/pull/3002 Differential Revision: D6050143 Pulled By: yiwu-arbug fbshipit-source-id: a8fb6e094fe39bdeace6279569834bc65aa64a34	7 years ago
Yi Wu	31d3e41810	PinnableSlice move assignment Summary: Allow `std::move(pinnable_slice)`. Closes https://github.com/facebook/rocksdb/pull/2997 Differential Revision: D6036782 Pulled By: yiwu-arbug fbshipit-source-id: 583fb0419a97e437ff530f4305822341cd3381fa	7 years ago
Sagar Vemuri	cc67b22d6e	Add OptionsUtil class to java/CMakeLists.txt Summary: Adding OptionsUtil java class and options_util.cc to java/CMakeLists.txt, which were missed accidentally when they were introduced in #2898. Closes https://github.com/facebook/rocksdb/pull/2985 Differential Revision: D6015878 Pulled By: sagar0 fbshipit-source-id: 1abbd46db4aebad1e07ea53523eacbdcb12823e1	7 years ago
Adam Retter	560e984995	Added CompactionFilterFactory support to RocksJava Summary: This PR also includes some cleanup, bugfixes and refactoring of the Java API. However these are really pre-cursors on the road to CompactionFilterFactory support. Closes https://github.com/facebook/rocksdb/pull/1241 Differential Revision: D6012778 Pulled By: sagar0 fbshipit-source-id: 0774465940ee99001a78906e4fed4ef57068ad5c	7 years ago
Andrew Kryczka	8dd0a7e11a	add comment in SuperVersion referencing logic Summary: The referencing logic is super confusing so added a comment at the part that took me longest to figure out. Closes https://github.com/facebook/rocksdb/pull/2996 Differential Revision: D6034969 Pulled By: ajkr fbshipit-source-id: 9cc2e744c1f79d6d57d378f86ed59238a5f583db	7 years ago
Yi Wu	fb4ae4d810	fix DBImpl::NewInternalIterator super-version leak on failure Summary: Close #2955 Closes https://github.com/facebook/rocksdb/pull/2960 Differential Revision: D5962872 Pulled By: yiwu-arbug fbshipit-source-id: a6472d5c015bea3dc476c572ff5a5c90259e6059	7 years ago
Kefu Chai	019aa7074c	cmake: pass "-msse4.2" to when building crc32c.cc if HAVE_SSE42 Summary: it turns out that, with older GCC shipped from centos7, the SSE42 intrinsics are not available even with "target" specified. so we need to pass "-msse42" for checking compiler's sse4.2 support and for building crc32c.cc which uses sse4.2 intrinsics for crc32. Signed-off-by: Kefu Chai <tchaikov@gmail.com> Closes https://github.com/facebook/rocksdb/pull/2950 Differential Revision: D6032298 Pulled By: siying fbshipit-source-id: 124c946321043661b3fb0a70b6cdf4c9c5126ab4	7 years ago
Yi Wu	38bbc879a5	fix travis failure for ccache command not found Summary: Travis don't have ccache installed on Mac. Only run the ccache command when it exists. https://docs.travis-ci.com/user/caching/#ccache-cache Closes https://github.com/facebook/rocksdb/pull/2990 Differential Revision: D6028837 Pulled By: yiwu-arbug fbshipit-source-id: 1e2d1c7f37be2c73773258c1fd5f24eebe7a06c6	7 years ago
Zhongyi Xie	0f3b36964e	Fix counter for memtable updates Summary: Right now in `PutCFImpl` we always increment NUMBER_KEYS_UPDATED counter for both in-place update or insertion. This PR fixes this by using the correct counter for either case. Closes https://github.com/facebook/rocksdb/pull/2986 Differential Revision: D6016300 Pulled By: miasantreble fbshipit-source-id: 0aed327522e659450d533d1c47d3a9f568fac65d	7 years ago
Andrew Kryczka	70aa942153	fix file numbers after repair Summary: The file numbers assigned post-repair were sometimes smaller than older files' numbers due to `LogAndApply` saving the wrong next file number in the manifest. - Mark the highest file seen during repair as used before `LogAndApply` so the correct next file number will be stored. - Renamed `MarkFileNumberUsedDuringRecovery` to `MarkFileNumberUsed` since now it's used during repair in addition to during recovery - Added `TEST_Current_Next_FileNo` to expose the next file number for the unit test. Closes https://github.com/facebook/rocksdb/pull/2988 Differential Revision: D6018083 Pulled By: ajkr fbshipit-source-id: 3f25cbf74439cb8f16dd12af90b67f9f9f75e718	7 years ago
Jay Patel	1a61ba179e	compaction picker to use max_bytes_for_level_multiplier_additional Summary: Hi, As part of some optimization, we're using multiple DB locations (tmpfs and spindle) to store data and configured max_bytes_for_level_multiplier_additional. But, max_bytes_for_level_multiplier_additional is not used to compute the actual size for the level while picking the DB location. So, even if DB location does not have space, RocksDB mistakenly puts the level at that location. Can someone pls. verify the fix? Let me know any other changes required. Thanks, Jay Closes https://github.com/facebook/rocksdb/pull/2704 Differential Revision: D5992515 Pulled By: ajkr fbshipit-source-id: cbbc6c0e0a7dbdca91c72e0f37b218c4cec57e28	7 years ago
Zhongyi Xie	e2548366e1	add GetLiveFiles and GetLiveFilesMetaData for BlobDB Summary: Closes https://github.com/facebook/rocksdb/pull/2976 Differential Revision: D5994759 Pulled By: miasantreble fbshipit-source-id: 985c31dccb957cb970c302f813cd07a1e8cb6438	7 years ago
Yi Wu	8c392a31d7	WritePrepared Txn: Iterator Summary: On iterator create, take a snapshot, create a ReadCallback and pass the ReadCallback to the underlying DBIter to check if key is committed. Closes https://github.com/facebook/rocksdb/pull/2981 Differential Revision: D6001471 Pulled By: yiwu-arbug fbshipit-source-id: 3565c4cdaf25370ba47008b0e0cb65b31dfe79fe	7 years ago
Sagar Vemuri	5a38e18627	Make some WriteOptions defaults more explicit Summary: Some WriteOptions defaults were not clearly documented. So, added comments to make the defaults more explicit. Closes https://github.com/facebook/rocksdb/pull/2984 Differential Revision: D6014500 Pulled By: sagar0 fbshipit-source-id: a28078818e335e42b303c1fc6fbfec692ed16c7c	7 years ago
Yi Wu	17c6325e8a	WritePrepare Txn: Cancel flush/compaction before destruction Summary: On WritePreparedTxnDB destruct there could be running compaction/flush holding a SnapshotChecker, which holds a pointer back to WritePreparedTxnDB. Make sure those jobs finished before destructing WritePreparedTxnDB. This is caught by TransactionTest::SeqAdvanceTest. Closes https://github.com/facebook/rocksdb/pull/2982 Differential Revision: D6002957 Pulled By: yiwu-arbug fbshipit-source-id: f1e70390c9798d1bd7959f5c8e2a1c14100773c3	7 years ago
Maysam Yabandeh	ec6c5383d0	WritePrepared Txn: end-to-end tests Summary: Enable WritePrepared policy for existing transaction tests. Closes https://github.com/facebook/rocksdb/pull/2972 Differential Revision: D5993614 Pulled By: maysamyabandeh fbshipit-source-id: d1eb53e2920c4e2a56434bb001231c98426f3509	7 years ago
Sagar Vemuri	da29eba43b	Enable WAL for blob index Summary: Enabled WAL, during GC, for blob index which is stored on regular RocksDB. Closes https://github.com/facebook/rocksdb/pull/2975 Differential Revision: D5997384 Pulled By: sagar0 fbshipit-source-id: b76c1487d8b5be0e36c55e8d77ffe3d37d63d85b	7 years ago
Yi Wu	d1b74b0c82	WritePrepared Txn: Compaction/Flush Summary: Update Compaction/Flush to support WritePreparedTxnDB: Add SnapshotChecker which is a proxy to query WritePreparedTxnDB::IsInSnapshot. Pass SnapshotChecker to DBImpl on WritePreparedTxnDB open. CompactionIterator use it to check if a key has been committed and if it is visible to a snapshot. In CompactionIterator: * check if key has been committed. If not, output uncommitted keys AS-IS. * use SnapshotChecker to check if key is visible to a snapshot when in need. * do not output key with seq = 0 if the key is not committed. Closes https://github.com/facebook/rocksdb/pull/2926 Differential Revision: D5902907 Pulled By: yiwu-arbug fbshipit-source-id: 945e037fdf0aa652dc5ba0ad879461040baa0320	7 years ago
Adrien Schildknecht	01542400a8	Inform caller when rocksdb is stalling writes Summary: Add a new function in Listener to let the caller know when rocksdb is stalling writes. Closes https://github.com/facebook/rocksdb/pull/2897 Differential Revision: D5860124 Pulled By: schischi fbshipit-source-id: ee791606169aa64f772c86f817cebf02624e05e1	7 years ago
Yi Wu	cc20ec3689	WritePrepared Txn: Test sequence number 0 is visible Summary: Compaction will output keys with sequence number 0, if it is visible to earliest snapshot. Adding a test to make sure IsInSnapshot() report sequence number 0 is visible to any snapshot. Closes https://github.com/facebook/rocksdb/pull/2974 Differential Revision: D5990665 Pulled By: yiwu-arbug fbshipit-source-id: ef50ebc777ff8ca688771f3ab598c7a609b0b65e	7 years ago
Andrew Kryczka	5a6ad9d52a	release build treat warnings as errors Summary: fixing warnings is important, especially for release code. Closes https://github.com/facebook/rocksdb/pull/2971 Differential Revision: D5980596 Pulled By: ajkr fbshipit-source-id: 04f4ea3fb005dcda33d60342e4361e380bc4dfb1	7 years ago
Maysam Yabandeh	4e3c3d8c6a	WritePrepared Txn: duplicate keys Summary: With WriteCommitted, when the write batch has duplicate keys, the txn db simply inserts them to the db with different seq numbers and let the db ignore/merge the duplicate values at the read time. With WritePrepared all the entries of the batch are inserted with the same seq number which prevents us from benefiting from this simple solution. This patch applies a hackish solution to unblock the end-to-end testing. The hack is to be replaced with a proper solution soon. The patch simply detects the duplicate key insertions, and mark the previous one as obsolete. Then before writing to the db it rewrites the batch eliminating the obsolete keys. This would incur a memcpy cost. Furthermore handing duplicate merge would require to do FullMerge instead of simply ignoring the previous value, which is not handled by this patch. Closes https://github.com/facebook/rocksdb/pull/2969 Differential Revision: D5976337 Pulled By: maysamyabandeh fbshipit-source-id: 114e65b66f137d8454ff2d1d782b8c05da95f989	7 years ago
Andrew Kryczka	1026e794a3	rate limit auto-tuning Summary: Dynamic adjustment of rate limit according to demand for background I/O. It increases by a factor when limiter is drained too frequently, and decreases by the same factor when limiter is not drained frequently enough. The parameters for this behavior are fixed in `GenericRateLimiter::Tune`. Other changes: - make rate limiter's `Env*` configurable for testing - track num drain intervals in RateLimiter so we don't have to rely on stats, which may be shared across different DB instances from the ones that share the RateLimiter. Closes https://github.com/facebook/rocksdb/pull/2899 Differential Revision: D5858704 Pulled By: ajkr fbshipit-source-id: cc2bac30f85e7f6fd63655d0a6732ef9ed7403b1	7 years ago
Adam Kupczyk	75f7f42d41	Added CPU prefetch for skiplist Summary: This change causes following changes result of test: ./db_bench --writes 10000000 --benchmarks="fillrandom" --compression_type none from fillrandom : 3.177 micros/op 314804 ops/sec; 34.8 MB/s to fillrandom : 2.777 micros/op 360087 ops/sec; 39.8 MB/s Closes https://github.com/facebook/rocksdb/pull/2961 Differential Revision: D5977822 Pulled By: yiwu-arbug fbshipit-source-id: 1ea77707bffa978b1592b0c5d0fe76bfa1930f8d	7 years ago
Manuel Ung	88ed1f6ea6	Allow upgrades from nullptr to some merge operator Summary: Currently, RocksDB does not allow reopening a preexisting DB with no merge operator defined, with a merge operator defined. This means that if a DB ever want to add a merge operator, there's no way to do so currently. Fix this by adding a new verification type `kByNameAllowFromNull` which will allow old values to be nullptr, and new values to be non-nullptr. Closes https://github.com/facebook/rocksdb/pull/2958 Differential Revision: D5961131 Pulled By: lth fbshipit-source-id: 06179bebd0d90db3d43690b5eb7345e2d5bab1eb	7 years ago
Andrew Kryczka	5b2cb64bfb	Prevent threads from respawning during joining Summary: Previously the thread pool might be non-empty after joining since concurrent submissions could spawn new threads. This problem didn't affect our background flush/compaction thread pools because the `shutting_down_` flag prevented new jobs from being submitted during/after joining. But I wanted to be able to reuse the `ThreadPool` without such external synchronization. Closes https://github.com/facebook/rocksdb/pull/2953 Differential Revision: D5951920 Pulled By: ajkr fbshipit-source-id: 0efec7d0056d36d1338367da75e8b0c089bbc973	7 years ago
Andrew Kryczka	821887036e	pin L0 filters/indexes for compaction outputs Summary: We need to tell the iterator the compaction output file's level so it can apply proper optimizations, like pinning filter and index blocks when user enables `pin_l0_filter_and_index_blocks_in_cache` and the output file's level is zero. Closes https://github.com/facebook/rocksdb/pull/2949 Differential Revision: D5945597 Pulled By: ajkr fbshipit-source-id: 2389decf9026ffaa32d45801a77d002529f64a62	7 years ago
Maysam Yabandeh	283d60761e	fix valgrind leak report in unit test Summary: I cannot locally reproduce the valgrind leak report but based on my code inspection not deleting txn1 might be the reason. ``` ==197848== 2,990 (544 direct, 2,446 indirect) bytes in 1 blocks are definitely lost in loss record 15 of 16 ==197848== at 0x4C2D06F: operator new(unsigned long) (in /usr/local/fbcode/gcc-5-glibc-2.23/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==197848== by 0x7D5B31: rocksdb::WritePreparedTxnDB::BeginTransaction(rocksdb::WriteOptions const&, rocksdb::TransactionOptions const&, rocksdb::Transaction) (pessimistic_transaction_db.cc:173) ==197848== by 0x7D80C1: rocksdb::PessimisticTransactionDB::Initialize(std::vector<unsigned long, std::allocator<unsigned long> > const&, std::vector<rocksdb::ColumnFamilyHandle, std::allocator<rocksdb::ColumnFamilyHandle> > const&) (pessimistic_transaction_db.cc:115) ==197848== by 0x7DC42F: rocksdb::WritePreparedTxnDB::Initialize(std::vector<unsigned long, std::allocator<unsigned long> > const&, std::vector<rocksdb::ColumnFamilyHandle, std::allocator<rocksdb::ColumnFamilyHandle> > const&) (pessimistic_transaction_db.cc:151) ==197848== by 0x7D8CA0: rocksdb::TransactionDB::WrapDB(rocksdb::DB, rocksdb::TransactionDBOptions const&, std::vector<unsigned long, std::allocator<unsigned long> > const&, std::vector<rocksdb::ColumnFamilyHandle, std::allocator<rocksdb::ColumnFamilyHandle> > const&, rocksdb::TransactionDB*) (pessimistic_transaction_db.cc:275) ==197848== by 0x7D9F26: rocksdb::TransactionDB::Open(rocksdb::DBOptions const&, rocksdb::TransactionDBOptions const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, std::vector<rocksdb::ColumnFamilyHandle, std::allocator<rocksdb::ColumnFamilyHandle> >, rocksdb::TransactionDB) (pessimistic_transaction_db.cc:227) ==197848== by 0x7DB349: rocksdb::TransactionDB::Open(rocksdb::Options const&, rocksdb::TransactionDBOptions const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, rocksdb::TransactionDB) (pessimistic_transaction_db.cc:198) ==197848== by 0x52ABD2: rocksdb::TransactionTest::ReOpenNoDelete() (transaction_test.h:87) ==197848== by 0x51F7B8: rocksdb::WritePreparedTransactionTest_BasicRecoveryTest_Test::TestBody() (write_prepared_transaction_test.cc:843) ==197848== by 0x857557: HandleSehExceptionsInMethodIfSupported<testing::Test, void> (gtest-all.cc:3824) ==197848== by 0x857557: void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test, void (testing::Test::)(), char const*) (gtest-all.cc:3860) ==197848== by 0x84E7EB: testing::Test::Run() [clone .part.485] (gtest-all.cc:3897) ==197848== by 0x84E9BC: Run (gtest-all.cc:3888) ==197848== by 0x84E9BC: testing::TestInfo::Run() [clone .part.486] (gtest-all.cc:4072) ``` Closes https://github.com/facebook/rocksdb/pull/2963 Differential Revision: D5968856 Pulled By: maysamyabandeh fbshipit-source-id: 2ac512bbcad37dc8eeeffe4f363978913354180c	7 years ago
Sagar Vemuri	377e004048	Fix DBOptionsTest.SetBytesPerSync test when run with no compression Summary: Also made the test more easier to understand: - changed the value size to ~1MB. - switched to NoCompression. We don't anyway need compression in this test for dynamic options. The test failures started happening starting from: #2893 . Closes https://github.com/facebook/rocksdb/pull/2957 Differential Revision: D5959392 Pulled By: sagar0 fbshipit-source-id: 2d55641e429246328bc6d10fcb9ef540d6ce07da	7 years ago
Yi Wu	92ccae7123	speedup 'make check' Summary: Make SnapshotConcurrentAccessTest run in the beginning of the queue. Test Plan `make all check -j64` on devserver Closes https://github.com/facebook/rocksdb/pull/2962 Differential Revision: D5965871 Pulled By: yiwu-arbug fbshipit-source-id: 8cb5a47c2468be0fbbb929226a143ec5848bfaa9	7 years ago
Yi Wu	d1cab2b64e	Add ValueType::kTypeBlobIndex Summary: Add kTypeBlobIndex value type, which will be used by blob db only, to insert a (key, blob_offset) KV pair. The purpose is to 1. Make it possible to open existing rocksdb instance as blob db. Existing value will be of kTypeIndex type, while value inserted by blob db will be of kTypeBlobIndex. 2. Make rocksdb able to detect if the db contains value written by blob db, if so return error. 3. Make it possible to have blob db optionally store value in SST file (with kTypeValue type) or as a blob value (with kTypeBlobIndex type). The root db (DBImpl) basically pretended kTypeBlobIndex are normal value on write. On Get if is_blob is provided, return whether the value read is of kTypeBlobIndex type, or return Status::NotSupported() status if is_blob is not provided. On scan allow_blob flag is pass and if the flag is true, return wether the value is of kTypeBlobIndex type via iter->IsBlob(). Changes on blob db side will be in a separate patch. Closes https://github.com/facebook/rocksdb/pull/2886 Differential Revision: D5838431 Pulled By: yiwu-arbug fbshipit-source-id: 3c5306c62bc13bb11abc03422ec5cbcea1203cca	7 years ago
Andrew Kryczka	880411f54c	disable populating block cache for in-place updates Summary: There's no point populating the block cache during this read. The key we read is guaranteed to be overwritten with a new `kValueType` key immediately afterwards, so can't be accessed again. A user was seeing high turnover of data blocks, at least partially due to this. Closes https://github.com/facebook/rocksdb/pull/2959 Differential Revision: D5961672 Pulled By: ajkr fbshipit-source-id: e7cb27c156c5db3b32af355c780efb99dbdf087c	7 years ago
Maysam Yabandeh	d27258d3a6	WritePrepared Txn: Rollback Summary: Implement the rollback of WritePrepared txns. For each modified value, it reads the value before the txn and write it back. This would cancel out the effect of transaction. It also remove the rolled back txn from prepared heap. Closes https://github.com/facebook/rocksdb/pull/2946 Differential Revision: D5937575 Pulled By: maysamyabandeh fbshipit-source-id: a6d3c47f44db3729f44b287a80f97d08dc4e888d	7 years ago
Sagar Vemuri	bb38cd03a9	Limit number of merge operands in Cassandra merge operator Summary: Now that RocksDB supports conditional merging during point lookups (introduced in #2923), Cassandra value merge operator can be updated to pass in a limit. The limit needs to be passed in from the Cassandra code. Closes https://github.com/facebook/rocksdb/pull/2947 Differential Revision: D5938454 Pulled By: sagar0 fbshipit-source-id: d64a72d53170d8cf202b53bd648475c3952f7d7f	7 years ago
Aliaksei Sandryhaila	cf51d3eb73	Remove an "unused" variable Summary: PR 2893 introduced a variable that is only used in TEST_SYNC_POINT_CALLBACK. When RocksDB is not built in debug mode, this method is not compiled in, and the variable is unused, which triggers a compiler error. This patch reverts the corresponding part of #2893. Closes https://github.com/facebook/rocksdb/pull/2956 Reviewed By: yiwu-arbug Differential Revision: D5955679 Pulled By: asandryh fbshipit-source-id: ac4a8e85b22da7f02efb117cd2e4a6e07ba73390	7 years ago
Adam Retter	983028f097	RocksJava build target for Docker on ppc64le Summary: This enables us to crossbuild pcc64le RocksJava binaries with a suitably old version of glibc (2.17) on CentOS 7. Closes https://github.com/facebook/rocksdb/pull/2491 Differential Revision: D5955301 Pulled By: sagar0 fbshipit-source-id: 69ef9746f1dc30ffde4063dc764583d8c7ae937e	7 years ago
Siying Dong	2a3363d52e	ldb dump can print histogram of value size Summary: Make "ldb dump --count_only" print histogram of value size. Also, fix a bug that "ldb dump --path=<db_path>" doesn't work. Closes https://github.com/facebook/rocksdb/pull/2944 Differential Revision: D5954527 Pulled By: siying fbshipit-source-id: c620a444ec544258b8d113f5f663c375dd53d6be	7 years ago
Zhongyi Xie	593d3de371	No need for Restart Interval for meta blocks Summary: In SST files, restart interval helps us search in data blocks. However, some meta blocks will be read sequentially, so there's no need for restart points. Restart interval will introduce extra space in the block (https://github.com/facebook/rocksdb/blob/master/table/block_builder.cc#L80). We will see if we can remove this redundant space. (Maybe set restart interval to infinite.) Closes https://github.com/facebook/rocksdb/pull/2940 Differential Revision: D5930139 Pulled By: miasantreble fbshipit-source-id: 92b1b23c15cffa90378343ac846b713623b19c21	7 years ago
Maysam Yabandeh	2b22baf304	Add a template for issues Summary: This template reminds the users to use issues only for bug reports. The template is written according to the github guidelines at https://help.github.com/articles/creating-an-issue-template-for-your-repository/ Closes https://github.com/facebook/rocksdb/pull/2948 Differential Revision: D5943558 Pulled By: maysamyabandeh fbshipit-source-id: c83b5d211ea8e334107141967689b2f0c453bbc9	7 years ago
Maysam Yabandeh	ab0542f5ec	Fix for when block.cache_handle is nullptr Summary: When using with compressed cache it is possible that the status is ok but the block is not actually added to the block cache. The patch takes this case into account. Closes https://github.com/facebook/rocksdb/pull/2945 Differential Revision: D5937613 Pulled By: maysamyabandeh fbshipit-source-id: 5428cf1115e5046b3d01ab78d26cb181122af4c6	7 years ago
Andrew Kryczka	5df172da2f	fix deletion-triggered compaction in table builder Summary: It was broken when `NotifyCollectTableCollectorsOnFinish` was introduced. That function called `Finish` on each of the `TablePropertiesCollector`s, and `CompactOnDeletionCollector::Finish()` was resetting all its internal state. Then, when we checked whether compaction is necessary, the flag had already been cleared. Fixed above issue by avoiding resetting internal state during `Finish()`. Multiple calls to `Finish()` are allowed, but callers cannot invoke `AddUserKey()` on the collector after any finishes. Closes https://github.com/facebook/rocksdb/pull/2936 Differential Revision: D5918659 Pulled By: ajkr fbshipit-source-id: 4f05e9d80e50ee762ba1e611d8d22620029dca6b	7 years ago
Maysam Yabandeh	385049baf2	WritePrepared Txn: Recovery Summary: Recover txns from the WAL. Also added some unit tests. Closes https://github.com/facebook/rocksdb/pull/2901 Differential Revision: D5859596 Pulled By: maysamyabandeh fbshipit-source-id: 6424967b231388093b4effffe0a3b1b7ec8caeb0	7 years ago
Yu Shu	8c724f5c7f	Default one to rocksdb:x64-windows Summary: The default one will try to install rocksdb:x86-windows, which would lead to failing of the build at the last step (CMake Error, Rocksdb only supports x64). Because it will try to install a serials of x86 version package, and those cannot proceed to rocksdb:x86-windows building. By using rocksdb:x64-windows, we can make sure to install x64 version. Tested on Win10 x64. Closes https://github.com/facebook/rocksdb/pull/2941 Differential Revision: D5937139 Pulled By: sagar0 fbshipit-source-id: 15637fe23df59326a0e607bd4d5c48733e20bae3	7 years ago
Sagar Vemuri	93c2b91740	Introduce conditional merge-operator invocation in point lookups Summary: For every merge operand encountered for a key in the read path we now have the ability to decide whether to look further (to retrieve more merge operands for the key) or stop and invoke the merge operator to return the value. The user needs to override `ShouldMerge()` method with a condition to terminate search when true to avail this facility. This has a couple of advantages: 1. It helps in limiting the number of merge operands that are looked at to compute a value as part of a user Get operation. 2. It allows to peek at a merge key-value to see if further merge operands need to look at. Example: Limiting the number of merge operands that are looked at: Lets say you have 10 merge operands for a key spread over various levels. If you only want RocksDB to look at the latest two merge operands instead of all 10 to compute the value, it is now possible with this PR. You can set the condition in `ShouldMerge()` to return true when the size of the operand list is 2. Look at the example implementation in the unit test. Without this PR, a Get might look at all the 10 merge operands in different levels before invoking the merge-operator. Added a new unit test. Made sure that there is no perf regression by running benchmarks. Command line to Load data: ``` TEST_TMPDIR=/dev/shm ./db_bench --benchmarks="mergerandom" --merge_operator="uint64add" --num=10000000 ... mergerandom : 12.861 micros/op 77757 ops/sec; 8.6 MB/s ( updates:10000000) ``` ReadRandomMergeRandom bechmark results: Command line: ``` TEST_TMPDIR=/dev/shm ./db_bench --benchmarks="readrandommergerandom" --merge_operator="uint64add" --num=10000000 ``` Base -- Without this code change (on commit `fc7476b`): ``` readrandommergerandom : 38.586 micros/op 25916 ops/sec; (reads:3001599 merges:6998401 total:10000000 hits:842235 maxlength:8) ``` With this code change: ``` readrandommergerandom : 38.653 micros/op 25870 ops/sec; (reads:3001599 merges:6998401 total:10000000 hits:842235 maxlength:8) ``` Closes https://github.com/facebook/rocksdb/pull/2923 Differential Revision: D5898239 Pulled By: sagar0 fbshipit-source-id: daefa325019f77968639a75c851d46352c2303ef	7 years ago

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