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

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Islam AbdelRahman 88e0527724 Reduce moving memory in LDB::ScanCommand ... Summary: Based on https://github.com/facebook/rocksdb/issues/843 It looks that when the data is hot we spend significant amount of time moving data out of RocksDB blocks. This patch reduce moving memory when possible Original performance ``` $ time ./ldb --db=/home/tec/local/ellina_test/testdb scan > /dev/null real 0m16.736s user 0m11.993s sys 0m4.725s ``` Performance after reducing memcpy ``` $ time ./ldb --db=/home/tec/local/ellina_test/testdb scan > /dev/null real 0m11.590s user 0m6.983s sys 0m4.595s ``` Test Plan: dump the output of the scan into 2 files and verifying the are exactly the same make check Reviewers: sdong, yhchiang, anthony, rven, igor Reviewed By: igor Subscribers: dhruba Differential Revision: https://reviews.facebook.net/D51093		9 years ago
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dump	Update dump_tool and undump_tool to accept Options	9 years ago
rdb	first rdb commit	10 years ago
Dockerfile	adding docker build script and dockerfile	10 years ago
auto_sanity_test.sh	Make auto_sanity_test always use the db_sanity_test.cc of the newer commit.	10 years ago
benchmark.sh	Fix benchmark report script	9 years ago
benchmark_leveldb.sh	Add scripts to run leveldb benchmark	10 years ago
check_format_compatible.sh	Script to check whether RocksDB can read DB generated by previous releases and vice versa	10 years ago
db_crashtest.py	crash_test to trigger some less frequent crash point more frequently	9 years ago
db_repl_stress.cc	"make format" against last 10 commits	9 years ago
db_sanity_test.cc	Add ZSTD (not final format) compression type	9 years ago
db_stress.cc	Allow users to disable some kill points in db_stress	9 years ago
dbench_monitor	Added simple monitoring script to monitor overusage of memory in db_bench	10 years ago
generate_random_db.sh	Script to check whether RocksDB can read DB generated by previous releases and vice versa	10 years ago
ldb.cc	Make db_stress built for ROCKSDB_LITE	10 years ago
ldb_cmd.cc	Reduce moving memory in LDB::ScanCommand	9 years ago
ldb_cmd.h	Move ldb and sst_dump from utils to tools.	9 years ago
ldb_cmd_execute_result.h	Move ldb and sst_dump from utils to tools.	9 years ago
ldb_cmd_test.cc	Block tests under ROCKSDB_LITE	9 years ago
ldb_test.py	Tests for ManifestDumpCommand and ListColumnFamiliesCommand	9 years ago
ldb_tool.cc	Reduce moving memory in LDB::ScanCommand	9 years ago
pflag	Added simple monitoring script to monitor overusage of memory in db_bench	10 years ago
reduce_levels_test.cc	Move ldb and sst_dump from utils to tools.	9 years ago
rocksdb_dump_test.sh	Update dump_tool and undump_tool to accept Options	9 years ago
run_flash_bench.sh	Improve defaults for benchmarks	9 years ago
run_leveldb.sh	Add scripts to run leveldb benchmark	10 years ago
sample-dump.dmp	First version of rocksdb_dump and rocksdb_undump.	10 years ago
sst_dump.cc	Make db_stress built for ROCKSDB_LITE	10 years ago
sst_dump_test.cc	Move ldb and sst_dump from utils to tools.	9 years ago
sst_dump_tool.cc	Move ldb and sst_dump from utils to tools.	9 years ago
sst_dump_tool_imp.h	Move ldb and sst_dump from utils to tools.	9 years ago
verify_random_db.sh	Script to check whether RocksDB can read DB generated by previous releases and vice versa	10 years ago
write_stress.cc	Fix compilation problem on Windows.	9 years ago
write_stress_runner.py	Write stress test	9 years ago