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

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anand76 13232e11d4 Allow cache_bench/db_bench to use a custom secondary cache (#8312) ... Summary: This PR adds a ```-secondary_cache_uri``` option to the cache_bench and db_bench tools to allow the user to specify a custom secondary cache URI. The object registry is used to create an instance of the ```SecondaryCache``` object of the type specified in the URI. The main cache_bench code is packaged into a separate library, similar to db_bench. An example invocation of db_bench with a secondary cache URI - ```db_bench --env_uri=ws://ws.flash_sandbox.vll1_2/ -db=anand/nvm_cache_2 -use_existing_db=true -benchmarks=readrandom -num=30000000 -key_size=32 -value_size=256 -use_direct_reads=true -cache_size=67108864 -cache_index_and_filter_blocks=true -secondary_cache_uri='cachelibwrapper://filename=/home/anand76/nvm_cache/cache_file;size=2147483648;regionSize=16777216;admPolicy=random;admProbability=1.0;volatileSize=8388608;bktPower=20;lockPower=12' -partition_index_and_filters=true -duration=1800``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/8312 Reviewed By: zhichao-cao Differential Revision: D28544325 Pulled By: anand1976 fbshipit-source-id: 8f209b9af900c459dc42daa7a610d5f00176eeed		4 years ago
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rocksdb	Allow cache_bench/db_bench to use a custom secondary cache (#8312)	4 years ago