fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Yanqin Jin 340ed4fac7 Add support for timestamp in Get/Put (#5079) ... Summary: It's useful to be able to (optionally) associate key-value pairs with user-provided timestamps. This PR is an early effort towards this goal and continues the work of facebook#4942. A suite of new unit tests exist in DBBasicTestWithTimestampWithParam. Support for timestamp requires the user to provide timestamp as a slice in `ReadOptions` and `WriteOptions`. All timestamps of the same database must share the same length, format, etc. The format of the timestamp is the same throughout the same database, and the user is responsible for providing a comparator function (Comparator) to order the <key, timestamp> tuples. Once created, the format and length of the timestamp cannot change (at least for now). Test plan (on devserver): ``` $COMPILE_WITH_ASAN=1 make -j32 all $./db_basic_test --gtest_filter=Timestamp/DBBasicTestWithTimestampWithParam.PutAndGet/* $make check ``` All tests must pass. We also run the following db_bench tests to verify whether there is regression on Get/Put while timestamp is not enabled. ``` $TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=fillseq,readrandom -num=1000000 $TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=fillrandom -num=1000000 ``` Repeat for 6 times for both versions. Results are as follows: ``` | | readrandom | fillrandom | | master | 16.77 MB/s | 47.05 MB/s | | PR5079 | 16.44 MB/s | 47.03 MB/s | ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/5079 Differential Revision: D15132946 Pulled By: riversand963 fbshipit-source-id: 833a0d657eac21182f0f206c910a6438154c742c		6 years ago
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cf_options.cc	Refresh snapshot list during long compactions (2nd attempt) (#5278)	6 years ago
cf_options.h	Refresh snapshot list during long compactions (2nd attempt) (#5278)	6 years ago
db_options.cc	Move some logging related files to logging/ (#5387)	6 years ago
db_options.h	Unordered Writes (#5218)	6 years ago
options.cc	Add support for timestamp in Get/Put (#5079)	6 years ago
options_helper.cc	Move some memory related files from util/ to memory/ (#5382)	6 years ago
options_helper.h	Option string/map/file can set env from object registry (#5237)	6 years ago
options_parser.cc	Move some memory related files from util/ to memory/ (#5382)	6 years ago
options_parser.h	Organizing rocksdb/table directory by format	6 years ago
options_sanity_check.cc	Change RocksDB License	8 years ago
options_sanity_check.h	Change RocksDB License	8 years ago
options_settable_test.cc	Move test related files under util/ to test_util/ (#5377)	6 years ago
options_test.cc	Call ValidateOptions from SetOptions (#5368)	6 years ago