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Aaron Gao 972f96b3fb direct io write support 
Summary:
rocksdb direct io support

```
[gzh@dev11575.prn2 ~/rocksdb] ./db_bench -benchmarks=fillseq --num=1000000
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
RocksDB:    version 5.0
Date:       Wed Nov 23 13:17:43 2016
CPU:        40 * Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz
CPUCache:   25600 KB
Keys:       16 bytes each
Values:     100 bytes each (50 bytes after compression)
Entries:    1000000
Prefix:    0 bytes
Keys per prefix:    0
RawSize:    110.6 MB (estimated)
FileSize:   62.9 MB (estimated)
Write rate: 0 bytes/second
Compression: Snappy
Memtablerep: skip_list
Perf Level: 1
WARNING: Assertions are enabled; benchmarks unnecessarily slow
------------------------------------------------
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
DB path: [/tmp/rocksdbtest-112628/dbbench]
fillseq      :       4.393 micros/op 227639 ops/sec;   25.2 MB/s

[gzh@dev11575.prn2 ~/roc
Closes https://github.com/facebook/rocksdb/pull/1564

Differential Revision: D4241093

Pulled By: lightmark

fbshipit-source-id: 98c29e3
 		2016-12-22 13:09:19 -08:00
..
dump Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
rdb fix typos in comments 2015-12-11 01:54:48 +09:00
CMakeLists.txt cmake support for linux and osx (#1358) 2016-09-28 11:53:15 -07:00
Dockerfile adding docker build script and dockerfile 2015-05-22 16:03:39 -07:00
auto_sanity_test.sh fix typos in comments 2015-12-11 01:54:48 +09:00
benchmark.sh Initial script for the new regression test 2016-05-09 13:32:57 -07:00
benchmark_leveldb.sh Add scripts to run leveldb benchmark 2015-04-27 19:32:56 -07:00
check_format_compatible.sh check_format_compatible.sh to use some branch which allows to run with GCC 4.8 (#1393) 2016-10-13 16:15:55 -07:00
db_bench.cc Initial script for the new regression test 2016-05-09 13:32:57 -07:00
db_bench_tool.cc direct io write support 2016-12-22 13:09:19 -08:00
db_bench_tool_test.cc direct io write support 2016-12-22 13:09:19 -08:00
db_crashtest.py Disable ClockCache db_crashtest 2016-08-24 14:19:05 -07:00
db_repl_stress.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_sanity_test.cc Support ZSTD with finalized format 2016-09-06 12:22:16 -07:00
db_stress.cc db_stress support for range deletions 2016-12-07 13:09:24 -08:00
dbench_monitor Added simple monitoring script to monitor overusage of memory in db_bench 2015-02-11 18:40:11 -08:00
generate_random_db.sh Script to check whether RocksDB can read DB generated by previous releases and vice versa 2015-04-08 16:04:59 -07:00
ldb.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
ldb_cmd.cc gcc-7 requires include <functional> for std::function 2016-12-16 11:24:18 -08:00
ldb_cmd_impl.h ldb support for range delete 2016-11-15 15:54:20 -08:00
ldb_cmd_test.cc cast to signed char in ldb_cmd_test for ppc64le 2016-12-12 14:39:18 -08:00
ldb_test.py ldb to support --column_family option 2016-01-25 14:58:18 -08:00
ldb_tool.cc ldb support for range delete 2016-11-15 15:54:20 -08:00
pflag Added simple monitoring script to monitor overusage of memory in db_bench 2015-02-11 18:40:11 -08:00
reduce_levels_test.cc [ldb] Templatize the Selector 2016-05-13 12:12:39 -07:00
regression_test.sh Fix a bug that mistakenly disable regression_test.sh to update commit (#1415) 2016-10-21 17:26:24 -07:00
rocksdb_dump_test.sh Update dump_tool and undump_tool to accept Options 2015-10-05 19:49:48 -07:00
run_flash_bench.sh Update benchmarks used to measure subcompaction performance 2016-03-04 12:32:11 -08:00
run_leveldb.sh Add scripts to run leveldb benchmark 2015-04-27 19:32:56 -07:00
sample-dump.dmp First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
sst_dump.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
sst_dump_test.cc Add TableBuilderOptions::level and relevant changes (#1335) 2016-09-17 22:30:43 -07:00
sst_dump_tool.cc Print user collected properties in sst_dump 2016-12-14 11:24:11 -08:00
sst_dump_tool_imp.h Remove ImmutableCFOptions from public API 2016-09-02 14:16:31 -07:00
verify_random_db.sh Script to check whether RocksDB can read DB generated by previous releases and vice versa 2015-04-08 16:04:59 -07:00
write_stress.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_stress_runner.py Write stress test 2015-10-28 16:15:07 -07:00