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

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Yanqin Jin 0ce0edbe12 Fix a data race between GetColumnFamilyMetaData and MarkFilesBeingCompacted (#6056) ... Summary: Use db mutex to protect the execution of Version::GetColumnFamilyMetaData() called in DBImpl::GetColumnFamilyMetaData(). Without mutex, GetColumnFamilyMetaData() races with MarkFilesBeingCompacted() for access to FileMetaData::being_compacted. Other than mutex, there are several more alternatives. - Make FileMetaData::being_compacted an atomic variable. This will make FileMetaData non-copy-able. - Separate being_compacted from FileMetaData. This requires re-organizing data structures that are already used in many places. Test Plan (dev server): ``` make check ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/6056 Differential Revision: D18620488 Pulled By: riversand963 fbshipit-source-id: 87f89660b5d5e2ab4ef7962b7b2a7d00e346aa3b		5 years ago
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db_impl.cc	Fix a data race between GetColumnFamilyMetaData and MarkFilesBeingCompacted (#6056)	5 years ago
db_impl.h	Batched MultiGet API for multiple column families (#5816)	5 years ago
db_impl_compaction_flush.cc	Fix IngestExternalFile's bug with two_write_queue (#5976)	5 years ago
db_impl_debug.cc	Fix IngestExternalFile's bug with two_write_queue (#5976)	5 years ago
db_impl_experimental.cc	BlobDB GC: add SST <-> oldest blob file referenced mapping (#5903)	5 years ago
db_impl_files.cc	Move WAL-closing loop out of original loop (#5804)	5 years ago
db_impl_open.cc	Update column families' log number altogether after flushing during recovery (#5856)	5 years ago
db_impl_readonly.cc	Apply formatter on recent 45 commits. (#5827)	5 years ago
db_impl_readonly.h	Use delete to disable automatic generated methods. (#5009)	5 years ago
db_impl_secondary.cc	Apply formatter to recent 200+ commits. (#5830)	5 years ago
db_impl_secondary.h	Override check consistency for DBImplSecondary (#5469)	5 years ago
db_impl_write.cc	Fix IngestExternalFile's bug with two_write_queue (#5976)	5 years ago
db_secondary_test.cc	Apply formatter to recent 200+ commits. (#5830)	5 years ago