Commit Graph

78 Commits

Author SHA1 Message Date
Dmitri Smirnov
9656eab005 This partially addresses issue https://github.com/facebook/rocksdb/issues/935
testutil.cc and testharness.cc could not be moved out at this time
  as they are used by 4 benchmarks in release builds.
2016-02-03 17:06:10 -08:00
Tomas Kolda
e2972803a6 Adding support for Windows JNI build 2016-02-02 09:11:37 +01:00
Islam AbdelRahman
d6c838f1e1 Add SstFileManager (component tracking all SST file in DBs and control the deletion rate)
Summary:
Add a new class SstFileTracker that will be notified whenever a DB add/delete/move and sst file, it will also replace DeleteScheduler
SstFileTracker can be used later to abort writes when we exceed a specific size

Test Plan: unit tests

Reviewers: rven, anthony, yhchiang, sdong

Reviewed By: sdong

Subscribers: igor, lovro, march, dhruba

Differential Revision: https://reviews.facebook.net/D50469
2016-01-28 18:35:01 -08:00
Tomas Kolda
4265f81e87 Remove util/auto_roll_logger.cc (it was moved to different directory) 2016-01-27 12:07:31 +01:00
Tomas Kolda
d7f22b6d25 Fixing generated GenerateBuildVersion.vcxproj when one builds on different
locale than english. The problem is that date and time CLI utilities
generates different format so that REGEX in CMake does not work.
2016-01-27 10:51:20 +01:00
Andrew Kryczka
167bd8856d [directory includes cleanup] Finish removing util->db dependencies 2016-01-26 10:49:24 -08:00
Andrew Kryczka
46f9cd46af [directory includes cleanup] Move cross-function test points
Summary:
I split the db-specific test points out into a separate file under db/
directory. There were also a few bugs to fix in xfunc.{h,cc} that prevented it
from compiling previously; see https://reviews.facebook.net/D36825.

Test Plan:
compilation works now, below command works, will also run "make xfunc".

  $ make check ROCKSDB_XFUNC_TEST='managed_new' tests-regexp='DBTest' -j32

Reviewers: sdong, yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53343
2016-01-26 10:49:05 -08:00
Andrew Kryczka
eceb5cb1b7 Split db_test.cc (part 1: properties)
Summary:
Moved all the tests that verify property correctness into a separate
file. The goal is to reduce compile time and complexity of db_test. I didn't
add parallelism for db_properties_test, even though these tests were
parallelized in db_test, since the file is small enough that it won't matter.

Some of these moves may be controversial since it's hard to say whether the
test is "verifying property correctness," or "using properties to verify
rocksdb's correctness." I'm interested in any opinions.

Test Plan: ran db_properties_test, also waiting on "make commit-prereq -j32"

Reviewers: yhchiang, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52995
2016-01-20 15:17:52 -08:00
Siying Dong
22c0ed8a5f Disable Visual Studio Warning C4351
Currently Windows build is broken because of Warning C4351. Disable the warning before figuring out the right way to fix it.
2015-12-28 15:06:34 -08:00
Nathan Bronson
7d87f02799 support for concurrent adds to memtable
Summary:
This diff adds support for concurrent adds to the skiplist memtable
implementations.  Memory allocation is made thread-safe by the addition of
a spinlock, with small per-core buffers to avoid contention.  Concurrent
memtable writes are made via an additional method and don't impose a
performance overhead on the non-concurrent case, so parallelism can be
selected on a per-batch basis.

Write thread synchronization is an increasing bottleneck for higher levels
of concurrency, so this diff adds --enable_write_thread_adaptive_yield
(default off).  This feature causes threads joining a write batch
group to spin for a short time (default 100 usec) using sched_yield,
rather than going to sleep on a mutex.  If the timing of the yield calls
indicates that another thread has actually run during the yield then
spinning is avoided.  This option improves performance for concurrent
situations even without parallel adds, although it has the potential to
increase CPU usage (and the heuristic adaptation is not yet mature).

Parallel writes are not currently compatible with
inplace updates, update callbacks, or delete filtering.
Enable it with --allow_concurrent_memtable_write (and
--enable_write_thread_adaptive_yield).  Parallel memtable writes
are performance neutral when there is no actual parallelism, and in
my experiments (SSD server-class Linux and varying contention and key
sizes for fillrandom) they are always a performance win when there is
more than one thread.

Statistics are updated earlier in the write path, dropping the number
of DB mutex acquisitions from 2 to 1 for almost all cases.

This diff was motivated and inspired by Yahoo's cLSM work.  It is more
conservative than cLSM: RocksDB's write batch group leader role is
preserved (along with all of the existing flush and write throttling
logic) and concurrent writers are blocked until all memtable insertions
have completed and the sequence number has been advanced, to preserve
linearizability.

My test config is "db_bench -benchmarks=fillrandom -threads=$T
-batch_size=1 -memtablerep=skip_list -value_size=100 --num=1000000/$T
-level0_slowdown_writes_trigger=9999 -level0_stop_writes_trigger=9999
-disable_auto_compactions --max_write_buffer_number=8
-max_background_flushes=8 --disable_wal --write_buffer_size=160000000
--block_size=16384 --allow_concurrent_memtable_write" on a two-socket
Xeon E5-2660 @ 2.2Ghz with lots of memory and an SSD hard drive.  With 1
thread I get ~440Kops/sec.  Peak performance for 1 socket (numactl
-N1) is slightly more than 1Mops/sec, at 16 threads.  Peak performance
across both sockets happens at 30 threads, and is ~900Kops/sec, although
with fewer threads there is less performance loss when the system has
background work.

Test Plan:
1. concurrent stress tests for InlineSkipList and DynamicBloom
2. make clean; make check
3. make clean; DISABLE_JEMALLOC=1 make valgrind_check; valgrind db_bench
4. make clean; COMPILE_WITH_TSAN=1 make all check; db_bench
5. make clean; COMPILE_WITH_ASAN=1 make all check; db_bench
6. make clean; OPT=-DROCKSDB_LITE make check
7. verify no perf regressions when disabled

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: MarkCallaghan, IslamAbdelRahman, anthony, yhchiang, rven, sdong, guyg8, kradhakrishnan, dhruba

Differential Revision: https://reviews.facebook.net/D50589
2015-12-25 11:03:40 -08:00
Dmitri Smirnov
3fa68af316 Enable MS compiler warning c4244.
Mostly due to the fact that there are differences in sizes of int,long
  on 64 bit systems vs GNU.
2015-12-11 16:52:41 -08:00
Dmitri Smirnov
236fe21c92 Enable MS compiler warning c4244.
Mostly due to the fact that there are differences in sizes of int,long
  on 64 bit systems vs GNU.
2015-12-11 16:47:34 -08:00
Igor Canadi
64fa43843b Merge pull request #862 from ceph/wip-env
implement EnvMirror
2015-12-10 18:45:07 -08:00
Sage Weil
2074ddd625 env: add EnvMirror
This is an Env implementation that mirrors all storage-related methods on
two different backend Env's and verifies that they return the same
results (return status and read results).  This is useful for implementing
a new Env and verifying its correctness.

Signed-off-by: Sage Weil <sage@redhat.com>
2015-12-10 21:32:45 -05:00
Warren Falk
c6fedf2bf8 Add compaction_iterator and delete_scheduler tests to Windows build 2015-12-09 11:01:02 -05:00
Siying Dong
fa3dbf203f Merge pull request #853 from Vaisman/enable_C4267_warning
Enable C4267 warning
2015-12-08 17:59:24 -08:00
yuslepukhin
78de0c9222 Fix up VS 15 build.
Fix warnings
 Take advantage of native snprintf on VS 15
2015-12-08 08:38:21 -08:00
Nathan Bronson
78812ec6bf InlineSkipList - part 1/3
Summary:
This diff is 1/3 in a sequence that introduces a skip list optimized for
a key that is a freshly-allocated const char*.  The diff is broken into
pieces to make it easier to review.  This piece only introduces the new
type by copying the existing SkipList, with mechanical naming changes
and reformatting.

Test Plan: new unit test

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D51279
2015-11-24 14:30:22 -08:00
Vasili Svirski
41b32c6059 Enable C4267 warning
* conversion from 'size_t' to 'type', by add static_cast

Tested:
* by build solution on Windows, Linux locally,
* run tests
* build CI system successful
2015-11-24 16:33:09 +03:00
yuslepukhin
047bd22aae Build on Visual Studio 2015 Update 1 2015-11-20 15:31:47 -08:00
Dmitri Smirnov
89bacb7e7d Enable MS Warning C4804 : unsafe use of type 'bool' in operation 2015-11-18 16:23:19 -08:00
Dmitri Smirnov
8f01f25414 Remove forward_iter_bench from Win build. 2015-11-16 11:10:58 -08:00
Venkatesh Radhakrishnan
7824444bfc Reuse file iterators in tailing iterator when memtable is flushed
Summary:
Under a tailing workload, there were increased block cache
misses when a memtable was flushed because we were rebuilding iterators
in that case since the version set changed. This was exacerbated in the
case of iterate_upper_bound, since file iterators which were over the
iterate_upper_bound would have been deleted and are now brought back as
part of the Rebuild, only to be deleted again. We now renew the iterators
and only build iterators for files which are added and delete file
iterators for files which are deleted.
Refer to https://reviews.facebook.net/D50463 for previous version

Test Plan: DBTestTailingIterator.TailingIteratorTrimSeekToNext

Reviewers: anthony, IslamAbdelRahman, igor, tnovak, yhchiang, sdong

Reviewed By: sdong

Subscribers: yhchiang, march, dhruba, leveldb, lovro

Differential Revision: https://reviews.facebook.net/D50679
2015-11-13 15:50:59 -08:00
yuslepukhin
2ab3e2df2c Fix a build break so tests can run 2015-11-12 14:53:19 -08:00
Yueh-Hsuan Chiang
e11f676e34 Add OptionsUtil::LoadOptionsFromFile() API
Summary:
This patch adds OptionsUtil::LoadOptionsFromFile() and
OptionsUtil::LoadLatestOptionsFromDB(), which allow developers
to construct DBOptions and ColumnFamilyOptions from a RocksDB
options file.  Note that most pointer-typed options such as
merge_operator will not be constructed.

With this API, developers no longer need to remember all the
options in order to reopen an existing rocksdb instance like
the following:

  DBOptions db_options;
  std::vector<std::string> cf_names;
  std::vector<ColumnFamilyOptions> cf_opts;

  // Load primitive-typed options from an existing DB
  OptionsUtil::LoadLatestOptionsFromDB(
      dbname, &db_options, &cf_names, &cf_opts);

  // Initialize necessary pointer-typed options
  cf_opts[0].merge_operator.reset(new MyMergeOperator());
  ...

  // Construct the vector of ColumnFamilyDescriptor
  std::vector<ColumnFamilyDescriptor> cf_descs;
  for (size_t i = 0; i < cf_opts.size(); ++i) {
    cf_descs.emplace_back(cf_names[i], cf_opts[i]);
  }

  // Open the DB
  DB* db = nullptr;
  std::vector<ColumnFamilyHandle*> cf_handles;
  auto s = DB::Open(db_options, dbname, cf_descs,
                    &handles, &db);

Test Plan:
Augment existing tests in column_family_test
options_test
db_test

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D49095
2015-11-12 06:52:43 -08:00
Yueh-Hsuan Chiang
e114f0abb8 Enable RocksDB to persist Options file.
Summary:
This patch allows rocksdb to persist options into a file on
DB::Open, SetOptions, and Create / Drop ColumnFamily.
Options files are created under the same directory as the rocksdb
instance.

In addition, this patch also adds a fail_if_missing_options_file in DBOptions
that makes any function call return non-ok status when it is not able to
persist options properly.

  // If true, then DB::Open / CreateColumnFamily / DropColumnFamily
  // / SetOptions will fail if options file is not detected or properly
  // persisted.
  //
  // DEFAULT: false
  bool fail_if_missing_options_file;

Options file names are formatted as OPTIONS-<number>, and RocksDB
will always keep the latest two options files.

Test Plan:
Add options_file_test.

options_test
column_family_test

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48285
2015-11-10 22:58:01 -08:00
Nathan Bronson
b81b430987 Switch to thread-local random for skiplist
Summary:
Using a TLS random instance for skiplist makes it smaller
(useful for hash_skiplist_rep) and prepares skiplist for concurrent
adds.  This diff also modifies the branching factor math to avoid an
unnecessary division.

This diff has the effect of changing the sequence of skip list node
height choices made by tests, so it has the potential to cause unit
test failures for tests that implicitly rely on the exact structure
of the skip list.  Tests that try to exactly trigger a compaction are
likely suspects for this problem (these tests have always been brittle to
changes in the skiplist details).  I've minimizes this risk by reseeding
the main thread's Random at the beginning of each test, increasing the
universal compaction size_ratio limit from 101% to 105% for some tests,
and verifying that the tests pass many times.

Test Plan: for i in `seq 0 9`; do make check; done

Reviewers: sdong, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D50439
2015-11-09 19:25:22 -08:00
Dmitri Smirnov
7c86d50497 Enable C4305 'identifier' : truncation from 'type1' to 'type2' 2015-11-06 16:44:39 -08:00
Dmitri Smirnov
85a2ce9c19 Enable C4702 unreachable code 2015-11-06 15:50:11 -08:00
Dmitri Smirnov
62aa1b1b78 Enable C4200 warning
nonstandard extension used : zero-sized array in struct/union
2015-11-06 15:32:45 -08:00
Dmitri Smirnov
20f57b1715 Enable Windows warnings C4307 C4309 C4512 C4701
Enable C4307 'operator' : integral constant overflow
  Longs and ints on Windows are 32-bit hence the overflow
  Enable C4309 'conversion' : truncation of constant value
  Enable C4512 'class' : assignment operator could not be generated
  Enable C4701 Potentially uninitialized local variable 'name' used
2015-11-06 11:34:06 -08:00
Yueh-Hsuan Chiang
183cadfc87 Add OptionsSanityCheckLevel
Summary:
This patch introduces OptionsSanityCheckLevel internally to enable
sanity check rocksdb options.

Utilities API will be added in the follow-up diffs.

Test Plan: Added more tests in options_test

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D49515
2015-11-04 18:53:30 -08:00
Yueh-Hsuan Chiang
7d7ee2b654 Add Memory Insight support to utilities
Summary:
This patch introduces utilities/memory, which currently includes
GetApproximateMemoryUsageByType that reports different types of
rocksdb memory usage given a list of input DBs.

The API also take care of the case where Cache could be shared
across multiple column families / multiple db instances.

Currently, it reports memory usage of memtable, table-readers
and cache.

Test Plan: utilities/memory/memory_test.cc

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D49257
2015-11-03 17:52:17 -08:00
Dmitri Smirnov
a0163c0682 Do not disable compiler warnings:
C4101 'identifier' : unreferenced local variable
  C4189 'identifier' : local variable is initialized but not referenced
  C4100 'identifier' : unreferenced formal parameter
  C4296 'operator' : expression is always false
2015-11-02 14:11:28 -08:00
Dmitri Smirnov
eaaf081d16 Do not suppress C4018 'expression' : signed/unsigned mismatch
The code compiles cleanly for the most part. Fix db_test.
  Move debug file to testutil library.
2015-10-30 17:03:16 -07:00
Igor Canadi
4b66d95344 Write stress test
Summary:
The goal of this diff is to create a simple stress test with focus on catching:
* bugs in compaction/flush processes, especially the ones that cause assertion errors
* bugs in the code that deletes obsolete files

There are two parts of the test:
* write_stress, a binary that writes to the database
* write_stress_runner.py, a script that invokes and kills write_stress

Here are some interesting parts of write_stress:
* Runs with very high concurrency of compactions and flushes (32 threads total) and tries to create a huge amount of small files
* The keys written to the database are not uniformly distributed -- there is a 3-character prefix that mutates occasionally (in prefix mutator thread), in such a way that the first character mutates slower than second, which mutates slower than third character. That way, the compaction stress tests some interesting compaction features like trivial moves and bottommost level calculation
* There is a thread that creates an iterator, holds it for couple of seconds and then iterates over all keys. This is supposed to test RocksDB's abilities to keep the files alive when there are references to them.
* Some writes trigger WAL sync. This is stress testing our WAL sync code.
* At the end of the run, we make sure that we didn't leak any of the sst files

write_stress_runner.py changes the mode in which we run write_stress and also kills and restarts it. There are some interesting characteristics:
* At the beginning we divide the full test runtime into smaller parts -- shorter runtimes (couple of seconds) and longer runtimes (100, 1000) seconds
* The first time we run write_stress, we destroy the old DB. Every next time during the test, we use the same DB.
* We can run in kill mode or clean-restart mode. Kill mode kills the write_stress violently.
* We can run in mode where delete_obsolete_files_with_fullscan is true or false
* We can run with low_open_files mode turned on or off. When it's turned on, we configure table cache to only hold a couple of files -- that way we need to reopen files every time we access them.

Another goal was to create a stress test without a lot of parameters. So tools/write_stress_runner.py should only take one parameter -- runtime_sec and it should figure out everything else on its own.

In a separate diff, I'll add this new test to our nightly legocastle runs.

Test Plan:
The goal of this test was to retroactively catch the following bugs: D33045, D48201, D46899, D42399. I failed to reproduce D48201, but all others have been caught!

When i reverted https://reviews.facebook.net/D33045:

     ./write_stress --runtime_sec=200 --low_open_files_mode=true
     Iterator statuts not OK: IO error: /fast-rocksdb-tmp/rocksdb_test/write_stress/089166.sst: No such file or directory

When i reverted https://reviews.facebook.net/D42399:

    python tools/write_stress_runner.py --runtime_sec=5000
    Running write_stress, will kill after 5 seconds: ./write_stress --runtime_sec=-1
    Running write_stress, will kill after 2 seconds: ./write_stress --runtime_sec=-1 --destroy_db=false --delete_obsolete_files_with_fullscan=true
    Running write_stress, will kill after 7 seconds: ./write_stress --runtime_sec=-1 --destroy_db=false
    Running write_stress, will kill after 5 seconds: ./write_stress --runtime_sec=-1 --destroy_db=false
    Running write_stress, will kill after 8 seconds: ./write_stress --runtime_sec=-1 --destroy_db=false --low_open_files_mode=true
    Write to DB failed: IO error: /fast-rocksdb-tmp/rocksdb_test/write_stress/019250.sst: No such file or directory
    ERROR: write_stress died with exitcode=-6

When i reverted https://reviews.facebook.net/D46899:

    python tools/write_stress_runner.py --runtime_sec=1000
    runtime: 1000
    Going to execute write stress for [3, 3, 100, 3, 2, 100, 1, 788]
    Running write_stress for 3 seconds: ./write_stress --runtime_sec=3 --low_open_files_mode=true
    Running write_stress for 3 seconds: ./write_stress --runtime_sec=3 --destroy_db=false --delete_obsolete_files_with_fullscan=true
    Running write_stress, will kill after 100 seconds: ./write_stress --runtime_sec=-1 --destroy_db=false --delete_obsolete_files_with_fullscan=true
    write_stress: db/db_impl.cc:2070: void rocksdb::DBImpl::MarkLogsSynced(uint64_t, bool, const rocksdb::Status&): Assertion `log.getting_synced' failed.
    ERROR: write_stress died with exitcode=-6

Reviewers: IslamAbdelRahman, yhchiang, rven, kradhakrishnan, sdong, anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D49533
2015-10-28 16:15:07 -07:00
Vasili Svirski
01a41af0ae Merge remote-tracking branch 'upstream/master' 2015-10-21 07:52:10 +04:00
Dmitri Smirnov
e154ee0863 Do not build test only code and unit tests in Release builds
Test code errors are currently blocking Windows Release builew
  We do not want spend time building in Release what we can not run
  We want to eliminate a source of most frequent errors when people
  check-in test only code which can not be built in Release.
  This feature will work only if you invoke msbuild against rocksdb.sln
  Invoking it against ALL_BUILD target will attempt to build everything.
2015-10-20 13:35:08 -07:00
Vasili Svirski
cd3286faea Error while cmake by building from zip-archive
* add validation is git found
* add validation is .git folder exists in project (project zip archive download without .git folder)
* get head commit SHA if git found and .git folder exists

Tested:
* configure project by CMake 3.0.0 successfully (with and without git), with project zip archive (without .git folder) and with project cloned from github
* configure project by command: cmake -G "Visual Studio 12 Win64"
* build solution by Visual Studio
* manually validate that file utils/build_version.cc contains valid head revision value
2015-10-20 22:51:19 +04:00
Alexey Maykov
e1a09a7703 Implementation for GetPropertiesOfTablesInRange
Summary: In MyRocks, it is sometimes important to get propeties only for the subset of the database. This diff implements the API in RocksDB.

Test Plan: ran the GetPropertiesOfTablesInRange

Reviewers: rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48651
2015-10-17 13:34:43 -07:00
Venkatesh Radhakrishnan
a98fbacfa0 Moving memtable related files from util to a new directory memtable
Summary:
We are cleaning up dependencies.
This diff takes a first step at moving memtable files to their own
directory called memtable. In future diffs, we will move other memtable
files from db to memtable.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48915
2015-10-16 14:10:33 -07:00
Siying Dong
5eee1ef2dd Merge pull request #770 from Vaisman/master
Error while cmake by building from zip-archive
2015-10-15 10:11:08 -07:00
Venkatesh Radhakrishnan
63e507c59c Move ldb and sst_dump from utils to tools.
Summary: As part of cleaning up dependencies for tech debt week, we are moving ldb and sst_dump tools from util to tools, since they are tools.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48747
2015-10-14 17:08:28 -07:00
Vasili Svirski
9f7413502c Error while cmake by building from zip-archive
* add -C ${CMAKE_CURRENT_SOURCE_DIR} to git can found revision from current source directory

Tested:
* configure project by CMake 3.0.0 successfully
* configure project by command: cmake -G "Visual Studio 12 Win64"
* build solution by Visual Studio
* manually validate that file utils/build_version.cc contains valid head revision value
2015-10-15 01:02:45 +04:00
Venkatesh Radhakrishnan
e587dbe03a Move manual_compaction_test.cc from util to db
Summary: manual_compaction_test.cc incorrectly in util. Moved to db.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48687
2015-10-14 11:06:27 -07:00
Venkatesh Radhakrishnan
f1fdf5205b Clean up dependency: Move db_test_util.* to db directory
Summary:
As part of tech debt week, we are cleaning up dependencies.
This diff moves db_test_util.[h,cc] from util to db directory.

Test Plan: make check

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48543
2015-10-12 13:05:42 -07:00
Dmitri Smirnov
25c58a2040 Add shared_linked DEBUG flag, remove port from among the include directories. 2015-10-06 15:52:09 -07:00
Dmitri Smirnov
9320ffd67a Improve CI build and fix Windows build breakage
Is there a way to enforce CMake additions for internal changes that seem to come
  w/o a PR?
2015-09-30 11:20:23 -07:00
Yueh-Hsuan Chiang
74b100ac17 RocksDB Options file format and its serialization / deserialization.
Summary:
This patch defines the format of RocksDB options file, which
follows the INI file format, and implements functions for its
serialization and deserialization.  An example RocksDB options
file can be found in examples/rocksdb_option_file_example.ini.

A typical RocksDB options file has three sections, which are
Version, DBOptions, and more than one CFOptions.  The RocksDB
options file in general follows the basic INI file format
with the following extensions / modifications:
 * Escaped characters
   We escaped the following characters:
    - \n -- line feed - new line
    - \r -- carriage return
    - \\ -- backslash \
    - \: -- colon symbol :
    - \# -- hash tag #
 * Comments
   We support # style comments.  Comments can appear at the ending
   part of a line.
 * Statements
   A statement is of the form option_name = value.
   Each statement contains a '=', where extra white-spaces
   are supported. However, we don't support multi-lined statement.
   Furthermore, each line can only contain at most one statement.
 * Section
   Sections are of the form [SecitonTitle "SectionArgument"],
   where section argument is optional.
 * List
   We use colon-separated string to represent a list.
   For instance, n1:n2:n3:n4 is a list containing four values.

Below is an example of a RocksDB options file:

[Version]
  rocksdb_version=4.0.0
  options_file_version=1.0
[DBOptions]
  max_open_files=12345
  max_background_flushes=301
[CFOptions "default"]
[CFOptions "the second column family"]
[CFOptions "the third column family"]

Test Plan: Added many tests in options_test.cc

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: maykov, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46059
2015-09-29 14:42:40 -07:00
Igor Canadi
75134f7562 Merge pull request #741 from yuslepukhin/test_appveyor_baseline
Improve CI build and build switches
2015-09-29 13:16:40 -07:00