[RocksJava] KeyMayExist w/o ColumnFamilies
add make clean in examples makefile
Merge pull request #379 from fyrz/RocksJavaBuildFix

[RocksJava] Build fix after options refactoring
Merge pull request #378 from baotiao/master

add make clean in examples makefile
Revamp our build tools

Summary:
This diff is revamping our build tools:
1) Use third-party2 instead of third-party
2) consolidate clang and gcc scripts together, lots of duplication there
3) remove hdfs libs, we never compile rocksdb with them

clang compilation doesn't work yet. It doesn't work in master either. I plan to fix it soon, but I just spent 2 hours trying to make it work and failed. I'll ask experts.

Test Plan: compiles with gcc

Reviewers: ljin, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28047
Fix coverage script
DB::Open() to automatically increase thread pool size if it is smaller than max number of parallel compactions or flushes

Summary:
With the patch, thread pool size will be automatically increased if DB's options ask for more parallelism of compactions or flushes.

Too many users have been confused by the API. Change it to make it harder for users to make mistakes

Test Plan: Add two unit tests to cover the function.

Reviewers: yhchiang, rven, igor, MarkCallaghan, ljin

Reviewed By: ljin

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27555
Enforce naming convention of getters in version_set.h

Summary: Enforce the accessier naming convention in functions in version_set.h

Test Plan: make all check

Reviewers: ljin, yhchiang, rven, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D28143
Apply InfoLogLevel to the logs in db/db_impl.cc

Summary: Apply InfoLogLevel to the logs in db/db_impl.cc

Test Plan:
db_test
db_bench

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: leveldb, MarkCallaghan, dhruba

Differential Revision: https://reviews.facebook.net/D28233
Apply InfoLogLevel to the logs in db/wal_manager.cc

Summary: Apply InfoLogLevel to the logs in db/wal_manager.cc

Test Plan: db_test

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28239
Apply InfoLogLevel to the logs in db/version_set.cc

Summary: Apply InfoLogLevel to the logs in db/version_set.cc

Test Plan: make

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27879
Merge pull request #374 from fyrz/RocksJava-DBOptions-Extension-3.6

[RocksJava] DBOptions extension 3.6
Merge pull request #377 from fyrz/RocksJava-KeyMayExist

[RocksJava] KeyMayExist w/o ColumnFamilies
Apply InfoLogLevel to the logs in db/compaction_job.cc

Summary: Apply InfoLogLevel to the logs in db/compaction_job.cc

Test Plan: db_test

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: leveldb, MarkCallaghan, dhruba

Differential Revision: https://reviews.facebook.net/D28275
DBTest.DynamicMemtableOptions to use single background compaction

Summary:
Now DBTest.DynamicMemtableOptions sets background compaction to be 4, without actually increasing thread pool size (even before the feature of automatic increasing it). To make sure the behavior stays the same after the automatic thread pool increasing, set it back to 1.

Hopefully it can fix the occasional failure of the test.

Test Plan: Run the test

Reviewers: igor, ljin

Reviewed By: ljin

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D28281
Replace some ASSERT_TRUE() asserts in DBTest.DynamicMemtableOptions and DynamicCompactionOptions with more specific ones

Summary: Replace some ASSERT_TRUE() to ASSERT_GT() and ASSERT_LT() so that in case the assert is triggered, the value is printed out.

Test Plan: Run the two tests

Reviewers: ljin, rven, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D28293
Bump verison number to 3.7

Summary: As tittle

Test Plan: N/A

Reviewers: ljin, yhchiang, rven, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D28299
fix the asan check

Summary: as title

Test Plan: ran it

Reviewers: yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28311
SetOptions() to return status and also add it to StackableDB

Summary: as title

Test Plan: ./db_test

Reviewers: sdong, yhchiang, rven, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28269
Note dynamic options in options.h

Summary: as title

Test Plan: n/a

Reviewers: igor, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28287