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

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sdong c3ff14e2c1 Hint temperature of bottommost level files to FileSystem (#8222) ... Summary: As the first part of the effort of having placing different files on different storage types, this change introduces several things: (1) An experimental interface in FileSystem that specify temperature to a new file created. (2) A test FileSystemWrapper, SimulatedHybridFileSystem, that simulates HDD for a file of "warm" temperature. (3) A simple experimental feature ColumnFamilyOptions.bottommost_temperature. RocksDB would pass this value to FileSystem when creating any bottommost file. (4) A db_bench parameter that applies the (2) and (3) to db_bench. The motivation of the change is to introduce minimal changes that allow us to evolve tiered storage development. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8222 Test Plan: ./db_bench --benchmarks=fillrandom --write_buffer_size=2000000 -max_bytes_for_level_base=20000000 -level_compaction_dynamic_level_bytes --reads=100 -compaction_readahead_size=20000000 --reads=100000 -num=10000000 followed by ./db_bench --benchmarks=readrandom,stats --write_buffer_size=2000000 -max_bytes_for_level_base=20000000 -simulate_hybrid_fs_file=/tmp/warm_file_list -level_compaction_dynamic_level_bytes -compaction_readahead_size=20000000 --reads=500 --threads=16 -use_existing_db --num=10000000 and see results as expected. Reviewed By: ajkr Differential Revision: D28003028 fbshipit-source-id: 4724896d5205730227ba2f17c3fecb11261744ce		4 years ago
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cf_options.cc	Rename variables in ImmutableCFOptions to avoid conflicts with ImmutableDBOptions (#8227)	4 years ago
cf_options.h	Hint temperature of bottommost level files to FileSystem (#8222)	4 years ago
configurable.cc	Move RegisterOptions into the Configurable API (#8223)	4 years ago
configurable_helper.h	Move RegisterOptions into the Configurable API (#8223)	4 years ago
configurable_test.cc	Move RegisterOptions into the Configurable API (#8223)	4 years ago
configurable_test.h	Move RegisterOptions into the Configurable API (#8223)	4 years ago
customizable.cc	Create a Customizable class to load classes and configurations (#6590)	4 years ago
customizable_helper.h	Move RegisterOptions into the Configurable API (#8223)	4 years ago
customizable_test.cc	Move RegisterOptions into the Configurable API (#8223)	4 years ago
db_options.cc	Rename variables in ImmutableCFOptions to avoid conflicts with ImmutableDBOptions (#8227)	4 years ago
db_options.h	Rename variables in ImmutableCFOptions to avoid conflicts with ImmutableDBOptions (#8227)	4 years ago
options.cc	Limit buffering for collecting samples for compression dictionary (#7970)	4 years ago
options_helper.cc	Make types of Immutable/Mutable Options fields match that of the underlying Option (#8176)	4 years ago
options_helper.h	Make types of Immutable/Mutable Options fields match that of the underlying Option (#8176)	4 years ago
options_parser.cc	Refactor: add LineFileReader and Status::MustCheck (#8026)	4 years ago
options_parser.h	Bring the Configurable options together (#5753)	4 years ago
options_settable_test.cc	Hint temperature of bottommost level files to FileSystem (#8222)	4 years ago
options_test.cc	Make types of Immutable/Mutable Options fields match that of the underlying Option (#8176)	4 years ago