Commit graph

226 commits

Author SHA1 Message Date
fyrz da8ff9ff89 Fixed Findbugs issues
- BackupableDB missing call to super.finalize(major)
- WriteBatchTest inefficient String usage(minor)
- RocksDB local dead variable store(medium)
2014-10-03 12:20:40 +02:00
fyrz a5757ff3c2 Listing of changes
- JavaDoc readability of RocksObject JavaDoc
- JavaDoc improvements BlockBasedTableConfig, GenericRateLimiterConfig, RocksDB
- JavaDoc improvements MemTableConfig
- JavaDoc improvements RocksObject
- JavaDoc improvements GenericRateLimiterConfig
- JavaDoc improvements ReadOptions
- JavaDoc improvements RateLimiterConfig
- JavaDoc improvements RestoreOptions
- JavaDoc improvements RestoreBackupableDB
- JavaDoc improvements BlockBasedTableConfig
- JavaDoc improvements Options
- JavaDoc improvements BackupableDB and BackupableDBOptions
2014-10-03 11:59:54 +02:00
Yueh-Hsuan Chiang df3373fbf7 [Java] Fix compile error on DbBenchmark.java
Summary:
Fix compile error on DbBenchmark.java

Test Plan:
make rocksdbjava
make jdb_bench
2014-10-03 02:14:43 -07:00
Yueh-Hsuan Chiang 0e516a75da Fix lint errors in java/rocksjni/options.cc
Summary:
Fix lint errors in java/rocksjni/options.cc

Test Plan:
make rocksdbjava
2014-10-03 00:10:58 -07:00
Chris Riccomini e869fc6a88 remove proper javadoc directory 2014-10-02 15:46:49 -07:00
Chris Riccomini 99744e0c4b bump version to 3.6 2014-10-02 14:59:20 -07:00
Chris Riccomini 45d526e226 singular javadoc directory 2014-10-02 14:57:18 -07:00
Chris Riccomini 378f321da2 merge master to resolve merge conflicts 2014-10-02 14:52:10 -07:00
Chris Riccomini c832f1644a add not about updating pom version and rename pom to be unversioned 2014-10-02 14:42:49 -07:00
Chris Riccomini 2d72f7807f update release docs in java 2014-10-02 14:26:52 -07:00
Chris Riccomini 2e80124982 add javadoc and sources targets for sonatype 2014-10-02 13:57:54 -07:00
Chris Riccomini df08a2d03c add single rocksdbjni pom 2014-10-02 13:47:07 -07:00
Chris Riccomini fd2545c80a add maven publication target and instructions 2014-10-02 13:29:47 -07:00
fyrz 0173541778 FilterTest 2014-10-02 21:17:48 +02:00
fyrz d410b39d59 BlockBasedTableConfig Filter policy support RocksJava
As proposed by yhchiang the filter can now be set in Java for
a BlockBasedTableConfig instance.
2014-10-02 21:17:48 +02:00
Chris Riccomini d0916f452f add major minor micro version to java jars 2014-10-02 11:07:45 -07:00
fyrz b3343fdeac resolution for java build problem introduced by 5ec53f3edf 2014-10-02 09:25:07 +02:00
Chris Riccomini 3a0d498a36 rebase master 2014-09-30 14:40:04 -07:00
Chris Riccomini 0b923f0f9a add centos 5.6 build instead of ubuntu. 2014-09-29 16:58:16 -07:00
Chris Riccomini 6a64ea6171 add note about java 7 2014-09-29 10:57:38 -07:00
Chris Riccomini c4519c777f fix mis-named jar in JNI loader 2014-09-29 10:42:00 -07:00
Chris Riccomini b8e26615aa since we're not sharing folders with the vm, copy built .so files and jars back to host system. 2014-09-26 18:27:32 -07:00
Chris Riccomini 4e735bb7f9 Rsync files to VM rather than sync folders, since sync folders was causing clock skew and confusig make. 2014-09-26 15:41:28 -07:00
Chris Riccomini 82a8f43ccc Document RELEASE.mdgit status 2014-09-26 14:58:33 -07:00
Chris Riccomini 9db13987b1 Update RocksDB's Java bindings to support multiple native RocksDB builds in the same Jar file. Cross build RocksDB for linux32 and linux64 using Vagrant. Build a cross-platform fat jar that contains osx, linux32, and linux64 RocksDB static builds. 2014-09-26 13:57:12 -07:00
fyrz 5340484266 Built-in comparator(s) in RocksJava
Extended Built-in comparators with ReverseBytewiseComparator.

Reverse key handling is under certain conditions essential. E.g. while
using timestamp versioned data.

As native-comparators were not available using JAVA-API. Both built-in comparators
were exposed via JNI to be set upon database creation time.
2014-09-26 10:35:12 +02:00
Igor Canadi 21ddcf6e4f Remove allow_thread_local
Summary: See https://reviews.facebook.net/D19365

Test Plan: compiles

Reviewers: sdong, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23907
2014-09-24 13:12:16 -07:00
Ankit Gupta 611e286b9d Merge branch 'master' of https://github.com/facebook/rocksdb 2014-09-24 11:44:23 -07:00
Ankit Gupta 0103b4498c Merge branch 'master' of ssh://github.com/ankgup87/rocksdb 2014-09-24 11:43:57 -07:00
Ankit Gupta 1dfb7bb980 Add block based table config options 2014-09-24 11:43:35 -07:00
Naveen ba6d660f6d Resolving merge conflict 2014-09-23 16:00:54 -07:00
Naveen 51eeaf65e2 Addressing review comments 2014-09-23 15:24:31 -07:00
Naveen fd7d3fe604 Addressing review comments (adding a env variable to override temp directory) 2014-09-23 15:24:19 -07:00
Naveen cf7ace8865 Addressing review comments 2014-09-23 15:23:57 -07:00
Ankit Gupta bfeef94d31 Add rate limiter 2014-09-19 16:11:59 -07:00
Ankit Gupta b93797abc4 Fix build 2014-09-18 22:13:52 -07:00
Yueh-Hsuan Chiang adae3ca1fe [Java] Fix JNI link error caused by the removal of options.db_stats_log_interval
Summary: Fix JNI link error caused by the removal of options.db_stats_log_interval in https://reviews.facebook.net/D21915.

Test Plan:
make rocksdbjava
make jtest

Reviewers: ljin, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23505
2014-09-18 21:09:44 -07:00
Yueh-Hsuan Chiang 94e43a1dfe [Java] Fixed 32-bit overflowing issue when converting jlong to size_t
Summary:
Fixed 32-bit overflowing issue when converting jlong to size_t by
capping jlong to std::numeric_limits<size_t>::max().

Test Plan:
make rocksdbjava
make jtest

Reviewers: ankgup87, ljin, sdong, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23511
2014-09-17 12:30:06 -07:00
Yueh-Hsuan Chiang acb9348ff3 [Java] Include WriteBatch into RocksDBSample.java, fix how DbBenchmark.java handles WriteBatch.
Summary:
Include WriteBatch into RocksDBSample.java, fix how DbBenchmark.java handles WriteBatch.
Previously DbBenchmark.java does not use WriteBatch when benchmarks is set to fillbatch.

Test Plan:
make rocksdbjava -j32
make jtest
make jdb_bench
cd java
./jdb_bench.sh --benchmarks=fillbatch

Reviewers: naveenatceg, ljin, sdong, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22983
2014-09-15 12:34:12 -07:00
Lei Jin dd641b2117 fix RocksDB java build
Summary: as title

Test Plan: make rocksdbjava

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23193
2014-09-10 12:00:32 -07:00
Naveen 1d284db213 Addressing review comments 2014-09-08 17:44:52 -07:00
Stanislau Hlebik 45a5e3ede0 Remove path with arena==nullptr from NewInternalIterator
Summary:
Simply code by removing code path which does not use Arena
from NewInternalIterator

Test Plan:
make all check
make valgrind_check

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22395
2014-09-04 17:40:41 -07:00
Lei Jin 66f62e5c78 JNI changes corresponding to BlockBasedTableOptions migration
Summary: as title

Test Plan:
tested on my mac
make rocksdbjava
make jtest

Reviewers: sdong, igor, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21963
2014-08-25 14:22:55 -07:00
Lei Jin 384400128f move block based table related options BlockBasedTableOptions
Summary:
I will move compression related options in a separate diff since this
diff is already pretty lengthy.
I guess I will also need to change JNI accordingly :(

Test Plan: make all check

Reviewers: yhchiang, igor, sdong

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21915
2014-08-25 14:22:05 -07:00
Naveen 343e98a7d1 Reverting import change 2014-08-18 14:08:10 -07:00
Naveen ddb8039e3a RocksDB static build
Make file changes to download and build the dependencies
.Load the shared library when RocksDB is initialized
2014-08-18 14:04:37 -07:00
Yueh-Hsuan Chiang 2da53b1e06 [Java] Add purgeOldBackups API
Summary:
1. Check status of CreateNewBackup. If status is not OK, then throw.
2. Add purgeOldBackups API

Test Plan:
make test
make sample

Reviewers: haobo, sdong, zzbennett, swapnilghike, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21753
2014-08-14 10:58:09 -07:00
Yueh-Hsuan Chiang 10fc6c7d25 [Java] Add compaction style to options
Summary:
Add compression type to options

make rocksdbjava
make sample

Reviewers: haobo, yhchiang, sdong, dhruba, rsumbaly, zzbennett, swapnilghike
Reviewed By: yhchiang, sdong
CC: leveldb

Differential Revision: https://reviews.facebook.net/D20463
2014-07-23 15:45:30 -07:00
Yueh-Hsuan Chiang 6e7e3e45ff [Java] Update header inclusion of utilities files
Summary:
Update header inclusion as include/utilities/*.h has been moved to
include/rocksdb/utilities/*.h

Test Plan: make rocksdbjava

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20517
2014-07-23 11:15:14 -07:00
Ankit Gupta 25682d1596 [Java] Optimize statistics collector, improve object dependency in RocksObjects
Summary:
This diff merges pull request #208.  Contributor: ankgup87

[Java] Optimize statistics collector
* Optimize statistics collector by collecting statistics of multiple DBs in a single thread rather than starting up a new thread for each DB.
* Also, fix packaging of jnilib file on OS_X platform.
* Diff review: https://reviews.facebook.net/D20265

[Java] Add documentation on interdependency of dispose call of RocksObjects
* Remove transferCppRawPointersOwnershipFrom function.
  - This function was setting opt.filter_ and thus filter_ to be null. This way there is no
    one holding reference for filter object and can thus be GC'd which is not the intention.
    Replaced it with storeOptionsInstace which stores options instance. Options class
    internally holds Filter instance. Thus when Options is GC'd, filter reference
    will be GC'd automatically.
* Added documentation explaining interdependency of Filter, Options and DB.
* Diff review: https://reviews.facebook.net/D20379

Test Plan:
described in their diff reviews

Reviewers:  haobo sdong swapnilghike zzbennett rsumbaly yhchiang

Reviewed by: yhchiang
2014-07-22 14:52:50 -07:00
Yueh-Hsuan Chiang d19aa25594 [Java] Add Java support for cache sharding.
Summary:
Add setCacheNumShardBits() and cacheNumShardBits() to Options.  This allows
developers to control the number of shards for the block cache.

Test Plan:
make rocksdbjava
cd java
make db_bench
./jdb_bench.sh --cache_size=1048576 --cache_numshardbits=6

Reviewers: sdong, ljin, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19347
2014-07-22 09:48:37 -07:00
Yueh-Hsuan Chiang ae7743f226 Fixed some make and linking issues of RocksDBJava
Summary:
Fixed some make and linking issues of RocksDBJava. Specifically:
* Add JAVA_LDFLAGS, which does not include gflags
* rocksdbjava library now uses JAVA_LDFLAGS instead of LDFLAGS
* java/Makefile now includes build_config.mk
* rearrange make rocksdbjava workflow to ensure the library file is correctly
  included in the jar file.

Test Plan:
make rocksdbjava
make jdb_bench
java/jdb_bench.sh

Reviewers: dhruba, swapnilghike, zzbennett, rsumbaly, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20289
2014-07-21 22:41:54 -07:00
Yueh-Hsuan Chiang 80a94d0517 [Java] Fixed the Java compilation error caused by PlainTableFactory API change.
Summary: Fixed the Java compilation error caused by PlainTableFactory API change.

Test Plan:
make rocksdbjava
make jdb_bench
cd java;./jdb_bench.sh

Reviewers: sdong, ljin, ankgup87, swapnilghike, zzbennett, rsumbaly, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20295
2014-07-21 09:19:28 -07:00
Ankit Gupta 0a4d930264 Caching methodId and fieldId is fine: v2 2014-07-09 09:09:08 -07:00
Ankit Gupta b6caaea9d3 Caching methodId and fieldId is fine 2014-07-09 09:06:40 -07:00
Ankit Gupta 21e522673f Revert wrong commit 2014-07-09 09:06:20 -07:00
Ankit Gupta 05bd545000 Caching methodId and fieldId is fine 2014-07-09 09:02:05 -07:00
Ankit Gupta 4216ca36ae Class IDs and method IDs should not be cached 2014-07-07 21:45:02 -07:00
Ankit Gupta 637744ce15 Package .so file with JNI jar 2014-07-07 20:50:21 -07:00
Ankit Gupta 97bfcd6a16 Update doc of options.cc 2014-07-07 12:26:06 -07:00
Ankit Gupta c9cfb88256 Remove doc from options class 2014-07-07 12:21:15 -07:00
Ankit Gupta 4efca96bb3 Change enum type from int to byte 2014-07-07 12:18:55 -07:00
Ankit Gupta e8c592c625 Add newline 2014-07-07 10:25:27 -07:00
Ankit Gupta 47f0cf6d38 Add docs 2014-07-07 10:06:28 -07:00
Ankit Gupta da12f9ec4e Remove .so package with JNI 2014-07-07 10:01:28 -07:00
Ankit Gupta 54d7a2c0c5 Add compression type to options 2014-07-07 09:58:54 -07:00
Ankit Gupta 6b835c6009 Merge branch 'master' of https://github.com/facebook/rocksdb 2014-07-03 14:13:46 -07:00
Ankit Gupta 70aa243fa1 Package .so file with .jar 2014-07-03 14:13:05 -07:00
Yueh-Hsuan Chiang f799c8be5f [Java] Correct the library loading for zlib in RocksJava.
Summary:
Correct the library loading for zlib in RocksJava: zlib should
be loaded by loadLibrary("z") instead of loadLibrary("zlib").

Test Plan:
make rocksdbjava
cd java
make db_bench
./jdb_bench.sh --compression_type=zlib

Reviewers: sdong, ljin, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19341
2014-06-29 12:35:47 -07:00
Ankit Gupta b2625a4cc1 Add java docs for StatsCollector constructor and StatsCollectorCallback thread safety 2014-06-29 07:52:27 -07:00
Ankit Gupta abf9920386 Merge branch 'master' of https://github.com/facebook/rocksdb 2014-06-28 11:22:33 -07:00
Yueh-Hsuan Chiang 85f9bb4ef4 [Java] Enable compression_ratio option in DbBenchmark.java
Summary:
Enable the random values in Java DB Bench to be generated based
on the compression_ratio specified in the command-line arguments.

Test Plan:
make rocksdbjava
java/jdb_bench.sh

Reviewers: sdong, ankgup87, haobo

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19101
2014-06-24 15:12:36 -06:00
Ankit Gupta 4938032549 Fix line width 2014-06-22 13:31:10 -07:00
Ankit Gupta 718029fc38 Arc lint fixes 2014-06-22 13:30:26 -07:00
Ankit Gupta e0ebea6cc2 Add doc and end of line 2014-06-22 13:27:22 -07:00
Ankit Gupta 143ee5a1c1 Add stats collector 2014-06-22 13:23:10 -07:00
Yueh-Hsuan Chiang 403636842a [Java] Add HISTORY-JAVA.md and include both C++ and Java history files in .jar.
Summary:
Add HISTORY-JAVA.md and include both C++ and Java history files in .jar file
that describes important chagnes of RocksJava.

Test Plan: make rocksdbjava and make sure HISTORY.md is inside the .jar file

Reviewers: haobo, sdong, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19185
2014-06-20 23:18:25 -07:00
Yueh-Hsuan Chiang 21e18ffa73 [Java] Improve the Java Doc of RocksObject
Summary:
Improve the Java Doc of RocksObject, which explains more about the life-cycle
of a native handle.

Test Plan: no code change

Reviewers: haobo, sdong, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19179
2014-06-20 23:16:54 -07:00
Yueh-Hsuan Chiang 3e701a654f [Java] Improve documentation for RocksEnv and its C++ resource.
Summary:
Improve documentation for RocksEnv and its C++ resource.  Specifically,
the result of RocksEnv::Default() is a singleton, and the ownership
of its c++ resource belongs to rocksdb c++.  As a result, calling
dispose() of the return value of RocksDB::Default() will be no-op.

Test Plan: no code change.

Reviewers: haobo, ankgup87

Reviewed By: ankgup87

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18945
2014-06-07 17:27:03 -07:00
Yueh-Hsuan Chiang e72b02e3c2 [Java] Add basic Java binding for rocksdb::Env.
Summary: Add basic Java binding for rocksdb::Env.

Test Plan:
make rocksdbjava
make jtest
cd java
./jdb_bench.sh --max_background_compactions=1
./jdb_bench.sh --max_background_compactions=10

Reviewers: sdong, ankgup87, haobo

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18903
2014-06-05 17:09:25 -07:00
Ankit Gupta 1a6c1a5ddd Fix build 2014-06-05 13:34:38 +01:00
Ankit Gupta 2fa0a993b8 Fix build 2014-06-05 13:25:08 +01:00
Ankit Gupta fa1b62cabd Merge remote-tracking branch 'upstream/master' 2014-05-29 18:33:11 -07:00
Yueh-Hsuan Chiang ab3e566699 [Java] Generalize dis-own native handle and refine dispose framework.
Summary:
1. Move disOwnNativeHandle() function from RocksDB to RocksObject
to allow other RocksObject to use disOwnNativeHandle() when its
ownership of native handle has been transferred.

2. RocksObject now has an abstract implementation of dispose(),
which does the following two things.  First, it checks whether
both isOwningNativeHandle() and isInitialized() return true.
If so, it will call the protected abstract function dispose0(),
which all the subclasses of RocksObject should implement.  Second,
it sets nativeHandle_ = 0.  This redesign ensure all subclasses
of RocksObject have the same dispose behavior.

3. All subclasses of RocksObject now should implement dispose0()
instead of dispose(), and dispose0() will be called only when
isInitialized() returns true.

Test Plan:
make rocksdbjava
make jtest

Reviewers: dhruba, sdong, ankgup87, rsumbaly, swapnilghike, zzbennett, haobo

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18801
2014-05-28 18:16:29 -07:00
Yueh-Hsuan Chiang 663627abf3 Merge pull request #153 from bpot/fix_jni_segfault
Segfault when using BackupableDB with Java bindings
2014-05-27 14:07:22 -07:00
Yueh-Hsuan Chiang 8e41e54e1b [Java] Makes DbBenchmark takes 0 and 1 as boolean values.
Summary:
Originally, the boolean arguments in Java DB benchmark only takes
true and false as valid input.  This diff allows boolean arguments
to be set using 0 or 1.

Test Plan:
make rocksdbjava
make jdb_bench
java/jdb_bench.sh --db=/tmp/path-not-exist --use_existing_db=1
java/jdb_bench.sh --db=/tmp/path-not-exist --use_existing_db=0
java/jdb_bench.sh --db=/tmp/path-not-exist --use_existing_db=1

Reviewers: haobo, dhruba, sdong, ankgup87, rsumbaly, swapnilghike, zzbennett

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18687
2014-05-27 13:52:44 -07:00
Bob Potter 05dd018353 BackupableDB: don't keep a reference to the RocksDB object now that we have disOwnNativeObject 2014-05-27 13:54:02 -05:00
Bob Potter 5fe176d8f6 Java Bindings: prevent segfault from double delete
Give BackupableDB sole responsibility of the native
object to prevent RocksDB from also trying to delete
it.
2014-05-21 18:47:18 -05:00
Ankit Gupta d271cc5b4e Treat negative values as no limit 2014-05-21 07:54:22 -07:00
Ankit Gupta e87973cde1 Removing code from portal.h for setting handle of RestoreOptions and RestoreBackupableDB 2014-05-18 22:40:48 -07:00
Ankit Gupta 29eef1f87d Add javadoc for BackupableDBOptions constructor params 2014-05-13 22:40:01 -07:00
Ankit Gupta b830bb937f Add newline at end of file 2014-05-13 22:34:29 -07:00
Ankit Gupta c92425e0ba Merge branch 'master' of https://github.com/facebook/rocksdb 2014-05-13 22:23:04 -07:00
Ankit Gupta cf0b773a29 Add more options to backupable DB 2014-05-13 22:22:21 -07:00
Ankit Gupta 036e323f7a Add RestoreBackupableDB and RestoreOptions 2014-05-13 22:20:58 -07:00
Yueh-Hsuan Chiang 9a0e3ab7ec Merge branch 'master' of github.com:facebook/rocksdb into show-reads 2014-05-13 16:45:54 -07:00
Yueh-Hsuan Chiang e883407ead [Java] Refined the output of Java DbBenchmark. 2014-05-13 16:44:53 -07:00
Yueh-Hsuan Chiang e30dec938d [Java] Fixed a bug in Java DB Benchmark where random reads does not consider full key range.
Summary: Fixed a bug in Java DB Benchmark where random reads does not consider full key range.

Test Plan:
make rocksdbjava
make jdb_bench
cd java
jdb_bench.sh --db=/tmp/rocksdb-test --benchmarks=fillseq --use_existing_db=false --num=100000
jdb_bench.sh --db=/tmp/rocksdb-test --benchmarks=readrandom --use_existing_db=true --num=100000 --reads=1000000

Reviewers: haobo, sdong

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18693
2014-05-13 13:19:50 -07:00
Yueh-Hsuan Chiang 93f2643656 [Java] Make read benchmarks print out found / not-found information.
Summary: Make read benchmarks print out found / not-found information.

Test Plan:
make rocksdbjava
make jdb_bench
cd java
./jdb_bench.sh

Reviewers: haobo, sdong

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18699
2014-05-13 13:11:26 -07:00
Yueh-Hsuan Chiang 2082a7d745 [Java] Temporary set the number of BG threads based on the number of BG compactions.
Summary:
Before the Java binding for Env is ready, Java developers have no way to
control the number of background threads.  This diff provides a temporary
solution where RocksDB.setMaxBackgroundCompactions() will affect the
number of background threads.

Note that once Env is ready.  Changes made in this diff should be reverted.

Test Plan:
make rocksdbjava
make jtest
make jdb_bench
java/jdb_bench.sh

Reviewers: haobo, sdong

Reviewed By: sdong

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18681
2014-05-13 12:28:47 -07:00