Summary:
Extend the plugin architecture to allow for the inclusion, building and testing of Java and JNI components of a plugin. This will cause the JAR built by `$ make rocksdbjava` to include the extra functionality provided by the plugin, and will cause `$ make jtest` to add the java tests provided by the plugin to the tests built and run by Java testing.
The plugin's `<plugin>.mk` file can define:
```
<plugin>_JNI_NATIVE_SOURCES
<plugin>_NATIVE_JAVA_CLASSES
<plugin>_JAVA_TESTS
```
The plugin should provide java/src, java/test and java/rocksjni directories. When a plugin is required to be build it must be named in the ROCKSDB_PLUGINS environment variable (as per the plugin architecture). This now has the effect of adding the files specified by the above definitions to the appropriate parts of the build.
An example of a plugin with a Java component can be found as part of the hdfs plugin in https://github.com/riversand963/rocksdb-hdfs-env - at the time of writing the Java part of this fails tests, and needs a little work to complete, but it builds correctly under the plugin model.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9575
Reviewed By: hx235
Differential Revision: D34253948
Pulled By: riversand963
fbshipit-source-id: b3dde5da06f3d3c25c54246892097ae2a369b42d
Summary:
For RocksJava 7 we will move from requiring Java 7 to Java 8.
* This simplifies the `Makefile` as we no longer need to deal with Java 7; so we no longer use `javah`.
* Added a java-version target which is invoked by the java target, and which exits if the version of java being used is not 8 or greater.
* Enforces java 8 as a minimum.
* Fixed CMake build.
* Fixed broken java event listener test, as the test was broken and the assertions in the callbacks were not causing assertions in the tests. The callbacks now queue up assertion errors for the main thread of the tests to check.
* Fixed C++ dangling pointers in the test code.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9541
Reviewed By: pdillinger
Differential Revision: D34214929
Pulled By: jay-zhuang
fbshipit-source-id: fdff348758d0a23a742e83c87d5f54073ce16ca6
Summary:
This also removes the obsolete names BackupableDBOptions
and UtilityDB. API users must now use BackupEngineOptions and
DBWithTTL::Open. In C API, `rocksdb_backupable_db_*` is replaced
`rocksdb_backup_engine_*`. Similar renaming in Java API.
In reference to https://github.com/facebook/rocksdb/issues/9389
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9438
Test Plan: CI
Reviewed By: mrambacher
Differential Revision: D33780269
Pulled By: pdillinger
fbshipit-source-id: 4a6cfc5c1b4c78bcad790b9d3dd13c5fdf4a1fac
Summary:
This PR moves HDFS support from RocksDB repo to a separate repo. The new (temporary?) repo
in this PR serves as an example before we finalize the decision on where and who to host hdfs support. At this point,
people can start from the example repo and fork.
Java/JNI is not included yet, and needs to be done later if necessary.
The goal is to include this commit in RocksDB 7.0 release.
Reference:
https://github.com/ajkr/dedupfs by ajkr
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9170
Test Plan:
Follow the instructions in https://github.com/riversand963/rocksdb-hdfs-env/blob/master/README.md. Build and run db_bench and db_stress.
make check
Reviewed By: ajkr
Differential Revision: D33751662
Pulled By: riversand963
fbshipit-source-id: 22b4db7f31762ed417a20239f5a08dcd1696244f
Summary:
* Added Docker build environment for RocksJava on s390x
* Cache alignment size for s390x was incorrectly calculated on gcc 6.4.0
* Tighter control over which installed version of Java is used is required - build now correctly adheres to `JAVA_HOME` if it is set
* Alpine build scripts should be used on Alpine (previously CentOS script worked by falling through to minimal gcc version)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9321
Reviewed By: mrambacher
Differential Revision: D33259624
Pulled By: jay-zhuang
fbshipit-source-id: d791a5150581344925c3c3f9cbb9a3622d63b3b6
Summary:
It seems that an incorrect native source file entry was introduced in https://github.com/facebook/rocksdb/pull/8999. For some reason it appears that CI was not run against that PR, and so the problem was not detected.
This PR fixes the problem by removing the invalid entry, allowing RocksJava to build correctly again.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9147
Reviewed By: pdillinger
Differential Revision: D32300976
fbshipit-source-id: dbd763b806bacf0fc08f4deaf07c63d0a266c4cf
Summary:
closes https://github.com/facebook/rocksdb/issues/5891
closes https://github.com/facebook/rocksdb/issues/2001
Java BytewiseComparator is now unsigned compliant, consistent with the default C++ comparator, which has always been thus. Consequently 2 tickets reporting the previous broken state can be closed.
This test confirms that the following issues were in fact resolved
by a change made between 6.2.2 and 6.22.1,
to wit https://github.com/facebook/rocksdb/commit/7242dae7
which as part of its effect, changed the Java bytewise comparators.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9019
Reviewed By: pdillinger
Differential Revision: D31610910
Pulled By: mrambacher
fbshipit-source-id: 664230f1377a1aa270136edd63eea2c206b907e9
Summary:
Implementation of https://github.com/facebook/rocksdb/issues/8221, plus/including extension of Java options API to allow the get() of options from RocksDB. The extension allows more comprehensive testing of options at the Java side, by validating that the options are set at the C++ side.
Variations on methods:
MutableColumnFamilyOptions.MutableColumnFamilyOptionsBuilder getOptions()
MutableDBOptions.MutableDBOptionsBuilder getDBOptions()
retrieve the options via RocksDB C++ interfaces, and parse the resulting string into one of the Java-style option objects.
This necessitated generalising the parsing of option strings in Java, which now parses the full range of option strings returned by the C++ interface, rather than a useful subset. This necessitates the list-separator being changed to :(colon) from , (comma).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8999
Reviewed By: jay-zhuang
Differential Revision: D31655487
Pulled By: ltamasi
fbshipit-source-id: c38e98145c81c61dc38238b0df580db176ce4efd
Summary:
closes https://github.com/facebook/rocksdb/issues/8039
Unnecessary use of multiple local JNI references at the same time, 1 per key, was limiting the size of the key array. The local references don't need to be held simultaneously, so if we rearrange the code we can make it work for bigger key arrays.
Incidentally, make errors throw helpful exception messages rather than returning a null pointer.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9012
Reviewed By: mrambacher
Differential Revision: D31580862
Pulled By: jay-zhuang
fbshipit-source-id: ce05831d52ede332e1b20e74d2dc621d219b9616
Summary:
support getUsage and getPinnedUsage in JavaAPI for Cache
also fix a typo in LRUCacheTest.java that the highPriPoolRatio is not valid(set 5, I guess it means 0.05)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7925
Reviewed By: mrambacher
Differential Revision: D26900241
Pulled By: ajkr
fbshipit-source-id: 735d1e40a16fa8919c89c7c7154ba7f81208ec33
Summary:
* Fixes a Java test compilation issue on macOS
* Cleans up CircleCI RocksDBJava build config
* Adds CircleCI for RocksDBJava on MacOS
* Ensures backwards compatibility with older macOS via CircleCI
* Fixes RocksJava static builds ordering
* Adds missing RocksJava static builds to CircleCI for Mac and Linux
* Improves parallelism in RocksJava builds
* Reduces the size of the machines used for RocksJava CircleCI as they don't need to be so large (Saves credits)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7769
Reviewed By: akankshamahajan15
Differential Revision: D25601293
Pulled By: pdillinger
fbshipit-source-id: 0a0bb9906f65438fe143487d78e37e1947364d08
Summary:
Allows adding event listeners in RocksJava.
* Adds listeners getter and setter in `Options` and `DBOptions` classes.
* Adds `EventListener` Java interface and base class for implementing custom event listener callbacks - `AbstractEventListener`, which has an underlying native callback class implementing C++ `EventListener` class.
* `AbstractEventListener` class has mechanism for selectively enabling its callback methods in order to prevent invoking Java method if it is not implemented. This decreases performance cost in case only subset of event listener callback methods is needed - the JNI code for remaining "no-op" callbacks is not executed.
* The code is covered by unit tests in `EventListenerTest.java`, there are also tests added for setting/getting listeners field in `OptionsTest.java` and `DBOptionsTest.java`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7425
Reviewed By: pdillinger
Differential Revision: D24063390
Pulled By: jay-zhuang
fbshipit-source-id: 508c359538983d6b765e70d9989c351794a944ee
Summary:
as title
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7347
Test Plan: unit tests included
Reviewed By: jay-zhuang
Differential Revision: D23592552
Pulled By: pdillinger
fbshipit-source-id: 1c3571b6f42bfd0cfd723ff49d01fbc02a1be45b
Summary:
SST Partitioner interface that allows to split SST files during compactions.
It basically instruct compaction to create a new file when needed. When one is using well defined prefixes and prefixed way of defining tables it is good to define also partitioning so that promotion of some SST file does not cover huge key space on next level (worst case complete space).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6957
Reviewed By: ajkr
Differential Revision: D22461239
fbshipit-source-id: 9ce07bba08b3ba89c2d45630520368f704d1316e
Summary:
The methods in convenience.h are used to compare/convert objects to/from strings. There is a mishmash of parameters in use here with more needed in the future. This PR replaces those parameters with a single structure.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6389
Reviewed By: siying
Differential Revision: D21163707
Pulled By: zhichao-cao
fbshipit-source-id: f807b4cc7e2b0af3871536b69546b2604dfa81bd
Summary:
After we had a lot of failures with maven.org downloads, we
wanted an alternative location for downloading binary dependencies.
Hosting them through github would have been good in terms of
organizational and network dependencies, but that approach seems to be
awkward (fake releases, so would need a 'rocksdb-deps' repo) and
strangely complicated for Facebook policy on open source repositories.
This commit moves the downloads (that are not officially hosted by
others on github) from my personal rocksdb fork to an S3 bucket owned
by the Facebook RocksDB AWS account. Facebook employees can access
this through an internal tool, and we should be able to grant permission
to outside collaborators.
Assuming this works out, I will back-port to older branches to stabilize
their CI testing as well.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6526
Test Plan: CI
Differential Revision: D20430130
Pulled By: pdillinger
fbshipit-source-id: df52394a65e0a57942db3039bdaade8a4d520cb2
Summary:
In the `.travis.yml` file the `jdk: openjdk7` element is ignored when `language: cpp`. So whatever version of the JDK that was installed in the Travis container was used - typically JDK 11.
To ensure our RocksJava builds are working, we now instead install and use OpenJDK 8. Ideally we would use OpenJDK 7, as RocksJava supports Java 7, but many of the newer Travis containers don't support Java 7, so Java 8 is the next best thing.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6512
Differential Revision: D20388296
Pulled By: pdillinger
fbshipit-source-id: 8bbe6b59b70cfab7fe81ff63867d907fefdd2df1
Summary:
This is a redesign of the API for RocksJava comparators with the aim of improving performance. It also simplifies the class hierarchy.
**NOTE**: This breaks backwards compatibility for existing 3rd party Comparators implemented in Java... so we need to consider carefully which release branches this goes into.
Previously when implementing a comparator in Java the developer had a choice of subclassing either `DirectComparator` or `Comparator` which would use direct and non-direct byte-buffers resepectively (via `DirectSlice` and `Slice`).
In this redesign there we have eliminated the overhead of using the Java Slice classes, and just use `ByteBuffer`s. The `ComparatorOptions` supplied when constructing a Comparator allow you to choose between direct and non-direct byte buffers by setting `useDirect`.
In addition, the `ComparatorOptions` now allow you to choose whether a ByteBuffer is reused over multiple comparator calls, by setting `maxReusedBufferSize > 0`. When buffers are reused, ComparatorOptions provides a choice of mutex type by setting `useAdaptiveMutex`.
---
[JMH benchmarks previously indicated](https://github.com/facebook/rocksdb/pull/6241#issue-356398306) that the difference between C++ and Java for implementing a comparator was ~7x slowdown in Java.
With these changes, when reusing buffers and guarding access to them via mutexes the slowdown is approximately the same. However, these changes offer a new facility to not reuse mutextes, which reduces the slowdown to ~5.5x in Java. We also offer a `thread_local` mechanism for reusing buffers, which reduces slowdown to ~5.2x in Java (closes https://github.com/facebook/rocksdb/pull/4425).
These changes also form a good base for further optimisation work such as further JNI lookup caching, and JNI critical.
---
These numbers were captured without jemalloc. With jemalloc, the performance improves for all tests, and the Java slowdown reduces to between 4.8x and 5.x.
```
ComparatorBenchmarks.put native_bytewise thrpt 25 124483.795 ± 2032.443 ops/s
ComparatorBenchmarks.put native_reverse_bytewise thrpt 25 114414.536 ± 3486.156 ops/s
ComparatorBenchmarks.put java_bytewise_non-direct_reused-64_adaptive-mutex thrpt 25 17228.250 ± 1288.546 ops/s
ComparatorBenchmarks.put java_bytewise_non-direct_reused-64_non-adaptive-mutex thrpt 25 16035.865 ± 1248.099 ops/s
ComparatorBenchmarks.put java_bytewise_non-direct_reused-64_thread-local thrpt 25 21571.500 ± 871.521 ops/s
ComparatorBenchmarks.put java_bytewise_direct_reused-64_adaptive-mutex thrpt 25 23613.773 ± 8465.660 ops/s
ComparatorBenchmarks.put java_bytewise_direct_reused-64_non-adaptive-mutex thrpt 25 16768.172 ± 5618.489 ops/s
ComparatorBenchmarks.put java_bytewise_direct_reused-64_thread-local thrpt 25 23921.164 ± 8734.742 ops/s
ComparatorBenchmarks.put java_bytewise_non-direct_no-reuse thrpt 25 17899.684 ± 839.679 ops/s
ComparatorBenchmarks.put java_bytewise_direct_no-reuse thrpt 25 22148.316 ± 1215.527 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_non-direct_reused-64_adaptive-mutex thrpt 25 11311.126 ± 820.602 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_non-direct_reused-64_non-adaptive-mutex thrpt 25 11421.311 ± 807.210 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_non-direct_reused-64_thread-local thrpt 25 11554.005 ± 960.556 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_direct_reused-64_adaptive-mutex thrpt 25 22960.523 ± 1673.421 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_direct_reused-64_non-adaptive-mutex thrpt 25 18293.317 ± 1434.601 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_direct_reused-64_thread-local thrpt 25 24479.361 ± 2157.306 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_non-direct_no-reuse thrpt 25 7942.286 ± 626.170 ops/s
ComparatorBenchmarks.put java_reverse_bytewise_direct_no-reuse thrpt 25 11781.955 ± 1019.843 ops/s
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6252
Differential Revision: D19331064
Pulled By: pdillinger
fbshipit-source-id: 1f3b794e6a14162b2c3ffb943e8c0e64a0c03738
Summary:
I set up a mirror of our Java deps on github so we can download
them through github URLs rather than maven.org, which is proving
terribly unreliable from Travis builds.
Also sanitized calls to curl, so they are easier to read and
appropriately fail on download failure.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6348
Test Plan: CI
Differential Revision: D19633621
Pulled By: pdillinger
fbshipit-source-id: 7eb3f730953db2ead758dc94039c040f406790f3
Summary:
Both changes are related to RocksJava:
1. Allow dependencies that are already present on the host system due to Maven to be reused in Docker builds.
2. Extend the `make clean-not-downloaded` target to RocksJava, so that libraries needed as dependencies for the test suite are not deleted and re-downloaded unnecessarily.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6318
Differential Revision: D19608742
Pulled By: pdillinger
fbshipit-source-id: 25e25649e3e3212b537ac4512b40e2e53dc02ae7
Summary:
As of 1/15/2020, Maven Central does not support plain HTTP. Because of
this, our Travis and AppVeyor builds have started failing during the
assertj download step. This patch will hopefully fix these issues.
See https://blog.sonatype.com/central-repository-moving-to-https
for more info.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6301
Test Plan:
Will monitor the builds. ("I don't always test my changes but when I do,
I do it in production.")
Differential Revision: D19422923
Pulled By: ltamasi
fbshipit-source-id: 76f9a8564a5b66ddc721d705f9cbfc736bf7a97d
Summary:
I think this should now also run on Travis's new virtualised infrastructure which affords more memory and CPU.
We also need to think about migrating from travis-ci.org to travis-ci.com.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4789
Differential Revision: D15856272
fbshipit-source-id: 10b41d21924e8a362bc9646a63ccd1a5dfc437c6
Summary:
This is my latest round of changes to add missing items to RocksJava. More to come in future PRs.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4833
Differential Revision: D14152266
Pulled By: sagar0
fbshipit-source-id: d6cff67e26da06c131491b5cf6911a8cd0db0775
Summary:
Allow rocks java to explicitly create WriteBufferManager by plumbing it to the native code through JNI.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4492
Differential Revision: D10428506
Pulled By: sagar0
fbshipit-source-id: cd9dd8c2ef745a0303416b44e2080547bdcca1fd
Summary:
Closes https://github.com/facebook/rocksdb/issues/4195
CompactRangeOptions are available the CPP API, but not in the Java API. This PR adds CompactRangeOptions to the Java API and adds an overloaded compactRange() method. See https://github.com/facebook/rocksdb/issues/4195 for the original discussion.
This change supports all fields of CompactRangeOptions, including the required enum converters in the JNI portal.
Significant changes:
- Make CompactRangeOptions available in the compactRange() for Java.
- Deprecate other compactRange() methods that have individual option params, like in the CPP code.
- Migrate rocksdb_compactrange_helper() to CompactRangeOptions.
- Add Java unit tests for CompactRangeOptions.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4220
Differential Revision: D9380007
Pulled By: sagar0
fbshipit-source-id: 6af6c334f221427f1997b33fb24c3986b092fed6
Summary:
This is an abstraction for working with custom Comparators implemented in native C++ code from Java. Native code must directly extend `rocksdb::Comparator`. When the native code comparator is compiled into the RocksDB codebase, you can then create a Java Class, and JNI stub to wrap it.
Useful if the C++/JNI barrier overhead is too much for your applications comparator performance.
An example is provided in `java/rocksjni/native_comparator_wrapper_test.cc` and `java/src/main/java/org/rocksdb/NativeComparatorWrapperTest.java`.
Closes https://github.com/facebook/rocksdb/pull/3334
Differential Revision: D7172605
Pulled By: miasantreble
fbshipit-source-id: e24b7eb267a3bcb6afa214e0379a1d5e8a2ceabe
Summary:
This PR also includes some cleanup, bugfixes and refactoring of the Java API. However these are really pre-cursors on the road to CompactionFilterFactory support.
Closes https://github.com/facebook/rocksdb/pull/1241
Differential Revision: D6012778
Pulled By: sagar0
fbshipit-source-id: 0774465940ee99001a78906e4fed4ef57068ad5c
Summary:
Major changes in this PR:
* Implement CassandraCompactionFilter to remove expired columns and rows (if all column expired)
* Move cassandra related code from utilities/merge_operators/cassandra to utilities/cassandra/*
* Switch to use shared_ptr<> from uniqu_ptr for Column membership management in RowValue. Since columns do have multiple owners in Merge and GC process, use shared_ptr helps make RowValue immutable.
* Rename cassandra_merge_test to cassandra_functional_test and add two TTL compaction related tests there.
Closes https://github.com/facebook/rocksdb/pull/2588
Differential Revision: D5430010
Pulled By: wpc
fbshipit-source-id: 9566c21e06de17491d486a68c70f52d501f27687
Summary:
Set to "-Xlint:deprecation -Xlint:unchecked" for non-zero
DEBUG_LEVEL
Shows up a few warnings for later perusal however passes ok.
Closes https://github.com/facebook/rocksdb/pull/2557
Differential Revision: D5408104
Pulled By: sagar0
fbshipit-source-id: 02908602e09b46d33b0dfc0ffd4b11954db03c53
Summary:
Previously the Java implementation of `RocksDB#addFile` was both incomplete and not inline with the C++ API.
Rather than fix it, as I see that `rocksdb::DB::AddFile` is now deprecated in favour of `rocksdb::DB::IngestExternalFile`, I have removed the old broken implementation and implemented `RocksDB#ingestExternalFile`.
Closes https://github.com/facebook/rocksdb/issues/2261
Closes https://github.com/facebook/rocksdb/pull/2291
Differential Revision: D5061264
Pulled By: sagar0
fbshipit-source-id: 85df0899fa1b1fc3535175cac4f52353511d4104
Summary:
Replacement of #2147
The change was squashed due to a lot of conflicts.
Closes https://github.com/facebook/rocksdb/pull/2194
Differential Revision: D4929799
Pulled By: siying
fbshipit-source-id: 5cd49c254737a1d5ac13f3c035f128e86524c581
Summary:
To correct a build process where the JAVA_TEST_LIBDIR is a symlink to a cache directory.
Test -s (size 0) on symlinks returns true, resulting in a mkdir over the top of the symlink resulting in failure.
As a solution -d checks if it is a directory (or the symlink refers to a directory), which works in the case of real directories and symlinks to directories.
Trivial I know but it was really easy for me to use a symlink here to prevent frequent downloads in a CI environment.
Thanks for your consideration.
Closes https://github.com/facebook/rocksdb/pull/1917
Differential Revision: D4612263
Pulled By: siying
fbshipit-source-id: 4d458f8e1760068cdd6b5eae4bce6e12c400df41
Summary:
This adds almost all missing options to RocksJava
Closes https://github.com/facebook/rocksdb/pull/2039
Differential Revision: D4779991
Pulled By: siying
fbshipit-source-id: 4a1bf28
Summary:
I have manually audited the entire RocksJava code base.
Sorry for the large pull-request, I have broken it down into many small atomic commits though.
My initial intention was to fix the warnings that appear when running RocksJava on Java 8 with `-Xcheck:jni`, for example when running `make jtest` you would see many errors similar to:
```
WARNING in native method: JNI call made without checking exceptions when required to from CallObjectMethod
WARNING in native method: JNI call made without checking exceptions when required to from CallVoidMethod
WARNING in native method: JNI call made without checking exceptions when required to from CallStaticVoidMethod
...
```
A few of those warnings still remain, however they seem to come directly from the JVM and are not directly related to RocksJava; I am in contact with the OpenJDK hostpot-dev mailing list about these - http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-February/025981.html.
As a result of fixing these, I realised we were not r
Closes https://github.com/facebook/rocksdb/pull/1890
Differential Revision: D4591758
Pulled By: siying
fbshipit-source-id: 7f7fdf4
Summary:
Junit and our code generate lots of warning if "-Xcheck:jni" is on and force Travis to fail as the logs are too long.
Test Plan: "make jtest" and see the warnings go away.
Summary:
- Deprecated RateLimiterConfig and GenericRateLimiterConfig
- Introduced RateLimiter
It is now possible to use all C++ related methods also in RocksJava.
A noteable method is setBytesPerSecond which can change the allowed
number of bytes per second at runtime.
Test Plan:
make rocksdbjava
make jtest
Reviewers: adamretter, yhchiang, ankgup87
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D35715
Alan Paxton