Commit graph

92 commits

Author SHA1 Message Date
Andrew Kryczka 186b3afaa8 Use fallocate even if hole-punching unsupported (#5023)
Summary:
The compiler flag `-DROCKSDB_FALLOCATE_PRESENT` was only set when
`fallocate`, `FALLOC_FL_KEEP_SIZE`, and `FALLOC_FL_PUNCH_HOLE` were all
present. However, the last of the three is not really necessary for the
primary `fallocate` use case; furthermore, it was introduced only in later
Linux kernel versions (2.6.38+).

This PR changes the flag `-DROCKSDB_FALLOCATE_PRESENT` to only require
`fallocate` and `FALLOC_FL_KEEP_SIZE` to be present. There is a separate
check for `FALLOC_FL_PUNCH_HOLE` only in the place where it is used.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5023

Differential Revision: D14248487

Pulled By: siying

fbshipit-source-id: a10ed0b902fa755988e957bd2dcec9081ec0502e
2019-03-04 15:43:17 -08:00
Michael Liu 3c5d1b16b1 Apply modernize-use-override (3)
Summary:
Use C++11’s override and remove virtual where applicable.
Change are automatically generated.

bypass-lint
drop-conflicts

Reviewed By: igorsugak

Differential Revision: D14131816

fbshipit-source-id: f20e7f7cecf2e699d70f5fa036f72c0e3f59b50e
2019-02-19 13:39:49 -08:00
Siying Dong c2affccc18 Header logger should call LogHeader() (#4980)
Summary:
The info log header feature never worked well, because log level Header was not
translated to Logger::LogHeader() call. Fix it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4980

Differential Revision: D14087283

Pulled By: siying

fbshipit-source-id: 7e7d03ce35fa8d13d4ee549f46f7326f7bc0006d
2019-02-15 16:59:36 -08:00
Young Tack Jin 4091597c67 fix for nvme device path (#4866)
Summary:
nvme device path doesn't have "block" as like "nvme/nvme0/nvme0n1"
or "nvme/nvme0/nvme0n1/nvme0n1p1". the last directory such as
"nvme0n1p1" should be removed if nvme drive is partitioned.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4866

Differential Revision: D13627824

Pulled By: riversand963

fbshipit-source-id: 09ab968f349f3dbb890beea20193f1359b17d317
2019-01-31 19:08:37 -08:00
Alexander Zinoviev 32a6dd9a41 Add a new CPU time counter to compaction report (#4889)
Summary:
Measure CPU time consumed for a compaction and report it in the stats report
Enable NowCPUNanos() to work for MacOS
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4889

Differential Revision: D13701276

Pulled By: zinoale

fbshipit-source-id: 5024e5bbccd4dd10fd90d947870237f436445055
2019-01-29 17:24:00 -08:00
Siying Dong da1c64b6e7 Introduce a CPU time counter in perf_context (#4741)
Summary:
Introduce the first CPU timing counter, perf_context.get_cpu_nanos. This opens a door to more CPU counters in the future.
Only Posix Env has it implemented using clock_gettime() with CLOCK_THREAD_CPUTIME_ID. How accurate the counter is depends on the platform.
Make PerfStepTimer to take an Env as an argument, and sometimes pass it in. The direct reason is to make the unit tests to use SpecialEnv where we can ingest logic there. But in long term, this is a good change.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4741

Differential Revision: D13287798

Pulled By: siying

fbshipit-source-id: 090361049d9d5095d1d1a369fe1338d2e2e1c73f
2018-12-20 12:03:44 -08:00
Sagar Vemuri dc3528077a Update all unique/shared_ptr instances to be qualified with namespace std (#4638)
Summary:
Ran the following commands to recursively change all the files under RocksDB:
```
find . -type f -name "*.cc" -exec sed -i 's/ unique_ptr/ std::unique_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/<unique_ptr/<std::unique_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/ shared_ptr/ std::shared_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/<shared_ptr/<std::shared_ptr/g' {} +
```
Running `make format` updated some formatting on the files touched.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4638

Differential Revision: D12934992

Pulled By: sagar0

fbshipit-source-id: 45a15d23c230cdd64c08f9c0243e5183934338a8
2018-11-09 11:19:58 -08:00
Sagar Vemuri abb8ecb4cd Add missing methods to WritableFileWrapper (#4584)
Summary:
`WritableFileWrapper` was missing some newer methods that were added to `WritableFile`. Without these functions, the missing wrapper methods would fallback to using the default implementations in WritableFile instead of using the corresponding implementations in, say, `PosixWritableFile` or `WinWritableFile`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4584

Differential Revision: D10559199

Pulled By: sagar0

fbshipit-source-id: 0d0f18a486aee727d5b8eebd3110a41988e27391
2018-10-24 12:19:54 -07:00
Zhongyi Xie cac87fcf57 move dump stats to a separate thread (#4382)
Summary:
Currently statistics are supposed to be dumped to info log at intervals of `options.stats_dump_period_sec`. However the implementation choice was to bind it with compaction thread, meaning if the database has been serving very light traffic, the stats may not get dumped at all.
We decided to separate stats dumping into a new timed thread using `TimerQueue`, which is already used in blob_db. This will allow us schedule new timed tasks with more deterministic behavior.

Tested with db_bench using `--stats_dump_period_sec=20` in command line:
> LOG:2018/09/17-14:07:45.575025 7fe99fbfe700 [WARN] [db/db_impl.cc:605] ------- DUMPING STATS -------
LOG:2018/09/17-14:08:05.643286 7fe99fbfe700 [WARN] [db/db_impl.cc:605] ------- DUMPING STATS -------
LOG:2018/09/17-14:08:25.691325 7fe99fbfe700 [WARN] [db/db_impl.cc:605] ------- DUMPING STATS -------
LOG:2018/09/17-14:08:45.740989 7fe99fbfe700 [WARN] [db/db_impl.cc:605] ------- DUMPING STATS -------

LOG content:
> 2018/09/17-14:07:45.575025 7fe99fbfe700 [WARN] [db/db_impl.cc:605] ------- DUMPING STATS -------
2018/09/17-14:07:45.575080 7fe99fbfe700 [WARN] [db/db_impl.cc:606]
** DB Stats **
Uptime(secs): 20.0 total, 20.0 interval
Cumulative writes: 4447K writes, 4447K keys, 4447K commit groups, 1.0 writes per commit group, ingest: 5.57 GB, 285.01 MB/s
Cumulative WAL: 4447K writes, 0 syncs, 4447638.00 writes per sync, written: 5.57 GB, 285.01 MB/s
Cumulative stall: 00:00:0.012 H:M:S, 0.1 percent
Interval writes: 4447K writes, 4447K keys, 4447K commit groups, 1.0 writes per commit group, ingest: 5700.71 MB, 285.01 MB/s
Interval WAL: 4447K writes, 0 syncs, 4447638.00 writes per sync, written: 5.57 MB, 285.01 MB/s
Interval stall: 00:00:0.012 H:M:S, 0.1 percent
** Compaction Stats [default] **
Level    Files   Size     Score Read(GB)  Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4382

Differential Revision: D9933051

Pulled By: miasantreble

fbshipit-source-id: 6d12bb1e4977674eea4bf2d2ac6d486b814bb2fa
2018-10-08 22:54:43 -07:00
Sagar Vemuri b1dad4cfcc assert in PosixEnv::FileExists should be based on errno (#4427)
Summary:
The assert in PosixEnv::FileExists is currently based on the return value of `access` syscall. Instead it should be based on errno.

Initially I wanted to remove this assert as [`access`](https://linux.die.net/man/2/access) can error out in a few other cases (like EROFS). But on thinking more it feels like the assert is doing the right thing ...  its good to crash on EROFS, EFAULT, EINVAL, and other major filesystem related problems so that the user is immediately aware of the problems while testing.
(I think it might be ok to crash on EIO as well, but there might be a specific reason why it was decided not to crash for EIO, and I don't have that context. So letting the letting the assert checks remain as is for now).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4427

Differential Revision: D10037200

Pulled By: sagar0

fbshipit-source-id: 5cc96116a2e53cef701f444a8b5290576f311e51
2018-09-26 13:25:15 -07:00
Anand Ananthabhotla a27fce408e Auto recovery from out of space errors (#4164)
Summary:
This commit implements automatic recovery from a Status::NoSpace() error
during background operations such as write callback, flush and
compaction. The broad design is as follows -
1. Compaction errors are treated as soft errors and don't put the
database in read-only mode. A compaction is delayed until enough free
disk space is available to accomodate the compaction outputs, which is
estimated based on the input size. This means that users can continue to
write, and we rely on the WriteController to delay or stop writes if the
compaction debt becomes too high due to persistent low disk space
condition
2. Errors during write callback and flush are treated as hard errors,
i.e the database is put in read-only mode and goes back to read-write
only fater certain recovery actions are taken.
3. Both types of recovery rely on the SstFileManagerImpl to poll for
sufficient disk space. We assume that there is a 1-1 mapping between an
SFM and the underlying OS storage container. For cases where multiple
DBs are hosted on a single storage container, the user is expected to
allocate a single SFM instance and use the same one for all the DBs. If
no SFM is specified by the user, DBImpl::Open() will allocate one, but
this will be one per DB and each DB will recover independently. The
recovery implemented by SFM is as follows -
  a) On the first occurance of an out of space error during compaction,
subsequent
  compactions will be delayed until the disk free space check indicates
  enough available space. The required space is computed as the sum of
  input sizes.
  b) The free space check requirement will be removed once the amount of
  free space is greater than the size reserved by in progress
  compactions when the first error occured
  c) If the out of space error is a hard error, a background thread in
  SFM will poll for sufficient headroom before triggering the recovery
  of the database and putting it in write-only mode. The headroom is
  calculated as the sum of the write_buffer_size of all the DB instances
  associated with the SFM
4. EventListener callbacks will be called at the start and completion of
automatic recovery. Users can disable the auto recov ery in the start
callback, and later initiate it manually by calling DB::Resume()

Todo:
1. More extensive testing
2. Add disk full condition to db_stress (follow-on PR)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4164

Differential Revision: D9846378

Pulled By: anand1976

fbshipit-source-id: 80ea875dbd7f00205e19c82215ff6e37da10da4a
2018-09-15 13:43:04 -07:00
cngzhnp 64324e329e Support pragma once in all header files and cleanup some warnings (#4339)
Summary:
As you know, almost all compilers support "pragma once" keyword instead of using include guards. To be keep consistency between header files, all header files are edited.

Besides this, try to fix some warnings about loss of data.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4339

Differential Revision: D9654990

Pulled By: ajkr

fbshipit-source-id: c2cf3d2d03a599847684bed81378c401920ca848
2018-09-05 18:13:31 -07:00
Wez Furlong d00e5de7fc use atomic O_CLOEXEC when available (#4328)
Summary:
In our application we spawn helper child processes concurrently with
opening rocksdb.  In one situation I observed that the child process had inherited
the rocksdb lock file as well as directory handles to the rocksdb storage location.

The code in env_posix takes care to set CLOEXEC but doesn't use `O_CLOEXEC` at the
time that the files are opened which means that there is a window of opportunity
to leak the descriptors across a fork/exec boundary.

This diff introduces a helper that can conditionally set the `O_CLOEXEC` bit for
the open call using the same logic as that in the existing helper for setting
that flag post-open.

I've preserved the post-open logic for systems that don't have `O_CLOEXEC`.

I've introduced setting `O_CLOEXEC` for what appears to be a number of temporary
or transient files and directory handles; I suspect that none of the files
opened by Rocks are intended to be inherited by a forked child process.

In one case, `fopen` is used to open a file.  I've added the use of the glibc-specific `e`
mode to turn on `O_CLOEXEC` for this case.  While this doesn't cover all posix systems,
it is an improvement for our common deployment system.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4328

Reviewed By: ajkr

Differential Revision: D9553046

Pulled By: wez

fbshipit-source-id: acdb89f7a85ca649b22fe3c3bd76f82142bec2bf
2018-08-29 20:27:43 -07:00
Jean-Marc Le Roux bbf30330b4 Fix the build failure with OS_ANDROID (#4232)
Summary:
sysmacros.h should be included in OS_ANDROID build as well otherwise the compile would complain: error: use of undeclared identifier 'major'.
Fixes https://github.com/facebook/rocksdb/issues/4231
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4232

Differential Revision: D9217350

Pulled By: maysamyabandeh

fbshipit-source-id: 21f4b62dbbda3163120ac0b38b95d95d35d67dce
2018-08-08 08:12:02 -07:00
Maysam Yabandeh 8581a93a6b Per-thread unique test db names (#4135)
Summary:
The patch makes sure that two parallel test threads will operate on different db paths. This enables using open source tools such as gtest-parallel to run the tests of a file in parallel.
Example: ``` ~/gtest-parallel/gtest-parallel ./table_test```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4135

Differential Revision: D8846653

Pulled By: maysamyabandeh

fbshipit-source-id: 799bad1abb260e3d346bcb680d2ae207a852ba84
2018-07-13 17:27:39 -07:00
Yanqin Jin 520bbb1774 Disable EnvPosixTest.RunImmediately, add EnvPosixTest.RunEventually. (#4126)
Summary:
The original `EnvPosixTest.RunImmediately` assumes that after scheduling
a background thread, the thread is guaranteed to complete after 0.1 second.
I do not know about any non-real-time OS/runtime providing this guarantee. Nor
does C++11 standard say anything about this in the documentation of `std::thread`.
In fact, we have observed this test failure multiple times on appveyor, and we
haven't been able to reproduce the failure deterministically. Therefore,
I disable this test for now until we know for sure how it used to fail.

Instead, I add another test `EnvPosixTest.RunEventually` that checks that
a thread will be scheduled eventually.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4126

Differential Revision: D8827086

Pulled By: riversand963

fbshipit-source-id: abc5cb655f90d50b791493da5eeb3716885dfe93
2018-07-12 18:27:15 -07:00
Siying Dong 926f3a78a6 In delete scheduler, before ftruncate file for slow delete, check whether there is other hard links (#4093)
Summary:
Right now slow deletion with ftruncate doesn't work well with checkpoints because it ruin hard linked files in checkpoints. To fix it, check the file has no other hard link before ftruncate it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4093

Differential Revision: D8730360

Pulled By: siying

fbshipit-source-id: 756eea5bce8a87b9a2ea3a5bfa190b2cab6f75df
2018-07-09 15:28:12 -07:00
Sagar Vemuri 645e57c22d Assert for Direct IO at the beginning in PositionedRead (#3891)
Summary:
Moved the direct-IO assertion to the top in `PosixSequentialFile::PositionedRead`, as it doesn't make sense to check for sector alignments before checking for direct IO.
Closes https://github.com/facebook/rocksdb/pull/3891

Differential Revision: D8267972

Pulled By: sagar0

fbshipit-source-id: 0ecf77c0fb5c35747a4ddbc15e278918c0849af7
2018-06-21 14:58:01 -07:00
Tomas Kolda 906a602c2c Build and tests fixes for Solaris Sparc (#4000)
Summary:
Here are some fixes for build on Solaris Sparc.

It is also fixing CRC test on BigEndian platforms.
Closes https://github.com/facebook/rocksdb/pull/4000

Differential Revision: D8455394

Pulled By: ajkr

fbshipit-source-id: c9289a7b541a5628139c6b77e84368e14dc3d174
2018-06-15 12:42:53 -07:00
Andrew Kryczka 1f32dc7d2b Check with PosixEnv before opening LOCK file (#3993)
Summary:
Rebased and resubmitting #1831 on behalf of stevelittle.

The problem is when a single process attempts to open the same DB twice, the second attempt fails due to LOCK file held. If the second attempt had opened the LOCK file, it'll now need to close it, and closing causes the file to be unlocked. Then, any subsequent attempt to open the DB will succeed, which is the wrong behavior.

The solution was to track which files a process has locked in PosixEnv, and check those before opening a LOCK file.

Fixes #1780.
Closes https://github.com/facebook/rocksdb/pull/3993

Differential Revision: D8398984

Pulled By: ajkr

fbshipit-source-id: 2755fe66950a0c9de63075f932f9e15768041918
2018-06-13 17:32:04 -07:00
Zhongyi Xie f1592a06c2 run make format for PR 3838 (#3954)
Summary:
PR https://github.com/facebook/rocksdb/pull/3838 made some changes that triggers lint warnings.
Run `make format` to fix formatting as suggested by siying .
Also piggyback two changes:
1) fix singleton destruction order for windows and posix env
2) fix two clang warnings
Closes https://github.com/facebook/rocksdb/pull/3954

Differential Revision: D8272041

Pulled By: miasantreble

fbshipit-source-id: 7c4fd12bd17aac13534520de0c733328aa3c6c9f
2018-06-05 12:58:02 -07:00
Andrew Kryczka 2210152947 Fix singleton destruction order of PosixEnv and SyncPoint (#3951)
Summary:
Ensure the PosixEnv singleton is destroyed first since its destructor waits for background threads to all complete. This ensures background threads cannot hit sync points after the SyncPoint singleton is destroyed, which was previously possible.
Closes https://github.com/facebook/rocksdb/pull/3951

Differential Revision: D8265295

Pulled By: ajkr

fbshipit-source-id: 7738dd458c5d993a78377dd0420e82badada81ab
2018-06-04 15:58:46 -07:00
奏之章 6e08916eb3 Fix Fadvise on closed file when reads use mmap
Summary:
```PosixMmapReadableFile::fd_``` is closed after created, but needs to remain open for the lifetime of `PosixMmapReadableFile` since it is used whenever `InvalidateCache` is called.
Closes https://github.com/facebook/rocksdb/pull/2764

Differential Revision: D8152515

Pulled By: ajkr

fbshipit-source-id: b738a6a55ba4e392f9b0f374ff396a1e61c64f65
2018-05-25 10:57:57 -07:00
Dmitri Smirnov 3db8504cde Catchup with posix features
Summary:
Catch up with Posix features
  NewWritableRWFile must fail when file does not exists
  Implement Env::Truncate()
  Adjust Env options optimization functions
  Implement MemoryMappedBuffer on Windows.
Closes https://github.com/facebook/rocksdb/pull/3857

Differential Revision: D8053610

Pulled By: ajkr

fbshipit-source-id: ccd0d46c29648a9f6f496873bc1c9d6c5547487e
2018-05-24 15:13:04 -07:00
Andrew Kryczka 072ae671a7 Apply use_direct_io_for_flush_and_compaction to writes only
Summary:
Previously `DBOptions::use_direct_io_for_flush_and_compaction=true` combined with `DBOptions::use_direct_reads=false` could cause RocksDB to simultaneously read from two file descriptors for the same file, where background reads used direct I/O and foreground reads used buffered I/O. Our measurements found this mixed-mode I/O negatively impacted foreground read perf, compared to when only buffered I/O was used.

This PR makes the mixed-mode I/O situation impossible by repurposing `DBOptions::use_direct_io_for_flush_and_compaction` to only apply to background writes, and `DBOptions::use_direct_reads` to apply to all reads. There is no risk of direct background direct writes happening simultaneously with buffered reads since we never read from and write to the same file simultaneously.
Closes https://github.com/facebook/rocksdb/pull/3829

Differential Revision: D7915443

Pulled By: ajkr

fbshipit-source-id: 78bcbf276449b7e7766ab6b0db246f789fb1b279
2018-05-09 19:42:58 -07:00
Siying Dong 3690276e74 Disallow to open RandomRW file if the file doesn't exist
Summary:
The only use of RandomRW is to change seqno when bulkloading, and in this use case, the file should exist. We should fail the file opening in this case.
Closes https://github.com/facebook/rocksdb/pull/3827

Differential Revision: D7913719

Pulled By: siying

fbshipit-source-id: 62cf6734f1a6acb9e14f715b927da388131c3492
2018-05-09 10:27:26 -07:00
Andrew Kryczka 19fde54841 initialize local variable for UBSAN in PosixEnv function
Summary:
this is a repeat commit of a8a28da215, which got reverted together with 6afe22db2e, but forgotten about when that commit was un-reverted in 46152d53bf.
Closes https://github.com/facebook/rocksdb/pull/3796

Differential Revision: D7826077

Pulled By: ajkr

fbshipit-source-id: edb22375da56e2feda50c5b35f942f4d2d52b19c
2018-05-01 13:27:05 -07:00
Andrew Kryczka 46152d53bf Second attempt at db_stress crash-recovery verification
Summary:
- Original commit: a4fb1f8c04
- Revert commit (we reverted as a quick fix to get crash tests passing): 6afe22db2e

This PR includes the contents of the original commit plus two bug fixes, which are:

- In whitebox crash test, only set `--expected_values_path` for `db_stress` runs in the first half of the crash test's duration. In the second half, a fresh DB is created for each `db_stress` run, so we cannot maintain expected state across `db_stress` runs.
- Made `Exists()` return true for `UNKNOWN_SENTINEL` values. I previously had an assert in `Exists()` that value was not `UNKNOWN_SENTINEL`. But it is possible for post-crash-recovery expected values to be `UNKNOWN_SENTINEL` (i.e., if the crash happens in the middle of an update), in which case this assertion would be tripped. The effect of returning true in this case is there may be cases where a `SingleDelete` deletes no data. But if we had returned false, the effect would be calling `SingleDelete` on a key with multiple older versions, which is not supported.
Closes https://github.com/facebook/rocksdb/pull/3793

Differential Revision: D7811671

Pulled By: ajkr

fbshipit-source-id: 67e0295bfb1695ff9674837f2e05bb29c50efc30
2018-04-30 12:27:34 -07:00
Andrew Kryczka 6afe22db2e revert db_stress crash-recovery verification
Summary:
crash-recovery verification is failing in the whitebox testing, which may or may not be a valid correctness issue -- need more time to investigate. In the meantime, reverting so we don't mask other failures.
Closes https://github.com/facebook/rocksdb/pull/3786

Differential Revision: D7794516

Pulled By: ajkr

fbshipit-source-id: 28ccdfdb9ec9b3b0fb08c15cbf9d2e282201ff33
2018-04-27 12:57:01 -07:00
Nathan VanBenschoten 37cd617b6b Add virtual Truncate method to Env
Summary:
This change adds a virtual `Truncate` method to `Env`, which truncates
the named file to the specified size. At the moment, this is only
supported for `MockEnv`, but other `Env's` could be extended to override
the method too. This is the same approach that methods like `LinkFile` and
`AreSameFile` have taken.

This is useful for any user of the in-memory `Env`. The implementation's
header is not exported, so before this change, it was impossible to
access it's already existing `Truncate` method.
Closes https://github.com/facebook/rocksdb/pull/3779

Differential Revision: D7785789

Pulled By: ajkr

fbshipit-source-id: 3bcdaeea7b7180529f7d9b496dc67b791a00bbf0
2018-04-26 21:12:51 -07:00
Andrew Kryczka dfc61e7c24 initialize local variable for UBSAN in PosixEnv function
Summary:
It seems clear to me that the variable is initialized before line 492, but it wasn't clear to UBSAN. The failure was:

```
In file included from ./env/io_posix.h:14:0,
                 from env/env_posix.cc:44:
./include/rocksdb/env.h: In member function ‘virtual rocksdb::Status rocksdb::{anonymous}::PosixEnv::NewMemoryMappedFileBuffer(const string&, std::unique_ptr<rocksdb::MemoryMappedFileBuffer>*)’:
./include/rocksdb/env.h:822:36: error: ‘base’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
       : base(_base), length(_length) {}
                                    ^
env/env_posix.cc:482:11: note: ‘base’ was declared here
     void* base;
```

We can just initialize to nullptr to keep UBSAN happy.
Closes https://github.com/facebook/rocksdb/pull/3770

Differential Revision: D7756287

Pulled By: ajkr

fbshipit-source-id: 0f2efb9594e2d3a30706a4ca7e1d4a6328031bf2
2018-04-25 13:42:02 -07:00
Andrew Kryczka a4fb1f8c04 Add crash-recovery correctness check to db_stress
Summary:
Previously, our `db_stress` tool held the expected state of the DB in-memory, so after crash-recovery, there was no way to verify data correctness. This PR adds an option, `--expected_values_file`, which specifies a file holding the expected values.

In black-box testing, the `db_stress` process can be killed arbitrarily, so updates to the `--expected_values_file` must be atomic. We achieve this by `mmap`ing the file and relying on `std::atomic<uint32_t>` for atomicity. Actually this doesn't provide a total guarantee on what we want as `std::atomic<uint32_t>` could, in theory, be translated into multiple stores surrounded by a mutex. We can verify our assumption by looking at `std::atomic::is_always_lock_free`.

For the `mmap`'d file, we didn't have an existing way to expose its contents as a raw memory buffer. This PR adds it in the `Env::NewMemoryMappedFileBuffer` function, and `MemoryMappedFileBuffer` class.

`db_crashtest.py` is updated to use an expected values file for black-box testing. On the first iteration (when the DB is created), an empty file is provided as `db_stress` will populate it when it runs. On subsequent iterations, that same filename is provided so `db_stress` can check the data is as expected on startup.
Closes https://github.com/facebook/rocksdb/pull/3629

Differential Revision: D7463144

Pulled By: ajkr

fbshipit-source-id: c8f3e82c93e045a90055e2468316be155633bd8b
2018-04-24 15:58:22 -07:00
Gabriel Wicke 090c78a0d7 Support lowering CPU priority of background threads
Summary:
Background activities like compaction can negatively affect
latency of higher-priority tasks like request processing. To avoid this,
rocksdb already lowers the IO priority of background threads on Linux
systems. While this takes care of typical IO-bound systems, it does not
help much when CPU (temporarily) becomes the bottleneck. This is
especially likely when using more expensive compression settings.

This patch adds an API to allow for lowering the CPU priority of
background threads, modeled on the IO priority API. Benchmarks (see
below) show significant latency and throughput improvements when CPU
bound. As a result, workloads with some CPU usage bursts should benefit
from lower latencies at a given utilization, or should be able to push
utilization higher at a given request latency target.

A useful side effect is that compaction CPU usage is now easily visible
in common tools, allowing for an easier estimation of the contribution
of compaction vs. request processing threads.

As with IO priority, the implementation is limited to Linux, degrading
to a no-op on other systems.
Closes https://github.com/facebook/rocksdb/pull/3763

Differential Revision: D7740096

Pulled By: gwicke

fbshipit-source-id: e5d32373e8dc403a7b0c2227023f9ce4f22b413c
2018-04-24 08:41:51 -07:00
Yi Wu 2e72a5899b Disable EnvPosixTest::FilePermission
Summary:
The test is flaky in our CI but could not be reproduce manually on the same CI host. Disabling it.
Closes https://github.com/facebook/rocksdb/pull/3753

Differential Revision: D7716320

Pulled By: yiwu-arbug

fbshipit-source-id: 6bed3b05880c1d24e8dc86bc970e5181bc98fb45
2018-04-20 15:42:42 -07:00
Andrew Kryczka 3cea61392f include thread-pool priority in thread names
Summary:
Previously threads were named "rocksdb:bg\<index in thread pool\>", so the first thread in all thread pools would be named "rocksdb:bg0". Users want to be able to distinguish threads used for flush (high-pri) vs regular compaction (low-pri) vs compaction to bottom-level (bottom-pri). So I changed the thread naming convention to include the thread-pool priority.
Closes https://github.com/facebook/rocksdb/pull/3702

Differential Revision: D7581415

Pulled By: ajkr

fbshipit-source-id: ce04482b6acd956a401ef22dc168b84f76f7d7c1
2018-04-18 17:27:56 -07:00
Zhongyi Xie 954b496b3f fix memory leak in two_level_iterator
Summary:
this PR fixes a few failed contbuild:
1. ASAN memory leak in Block::NewIterator (table/block.cc:429). the proper destruction of first_level_iter_ and second_level_iter_ of two_level_iterator.cc is missing from the code after the refactoring in https://github.com/facebook/rocksdb/pull/3406
2. various unused param errors introduced by https://github.com/facebook/rocksdb/pull/3662
3. updated comment for `ForceReleaseCachedEntry` to emphasize the use of `force_erase` flag.
Closes https://github.com/facebook/rocksdb/pull/3718

Reviewed By: maysamyabandeh

Differential Revision: D7621192

Pulled By: miasantreble

fbshipit-source-id: 476c94264083a0730ded957c29de7807e4f5b146
2018-04-15 17:26:26 -07:00
Xiaofei Du a0102aa6d7 Make database files' permissions configurable
Summary: Closes https://github.com/facebook/rocksdb/pull/3709

Differential Revision: D7610227

Pulled By: xiaofeidu008

fbshipit-source-id: 88a52f0f9f96e2195fccde995cf9760b785e9f07
2018-04-13 13:13:04 -07:00
Steven Fackler 1f5457ef21 Merge raw and shared pointer log method impls
Summary:
Calling rocksdb::Log, rocksdb::Info, etc with a `shared_ptr<Logger>` should behave the same as calling those functions with a `Logger *`. This PR achieves it by making the `shared_ptr<Logger>` versions delegate to the `Logger *` versions.

Closes #3689
Closes https://github.com/facebook/rocksdb/pull/3710

Differential Revision: D7595557

Pulled By: ajkr

fbshipit-source-id: 64dd7f20fd42dc821bac7b8032705c35b483e00d
2018-04-13 11:12:54 -07:00
David Lai 3be9b36453 comment unused parameters to turn on -Wunused-parameter flag
Summary:
This PR comments out the rest of the unused arguments which allow us to turn on the -Wunused-parameter flag. This is the second part of a codemod relating to https://github.com/facebook/rocksdb/pull/3557.
Closes https://github.com/facebook/rocksdb/pull/3662

Differential Revision: D7426121

Pulled By: Dayvedde

fbshipit-source-id: 223994923b42bd4953eb016a0129e47560f7e352
2018-04-12 17:59:16 -07:00
Bruce Mitchener a3a3f5497c Fix some typos in comments and docs.
Summary: Closes https://github.com/facebook/rocksdb/pull/3568

Differential Revision: D7170953

Pulled By: siying

fbshipit-source-id: 9cfb8dd88b7266da920c0e0c1e10fb2c5af0641c
2018-03-08 10:27:25 -08:00
Bruce Mitchener 0de710f5b8 Use nullptr instead of NULL / 0 more consistently.
Summary: Closes https://github.com/facebook/rocksdb/pull/3569

Differential Revision: D7170968

Pulled By: yiwu-arbug

fbshipit-source-id: 308a6b7dd358a04fd9a7de3d927bfd8abd57d348
2018-03-07 12:42:12 -08:00
amytai 0a3db28d98 Disallow compactions if there isn't enough free space
Summary:
This diff handles cases where compaction causes an ENOSPC error.
This does not handle corner cases where another background job is started while compaction is running, and the other background job triggers ENOSPC, although we do allow the user to provision for these background jobs with SstFileManager::SetCompactionBufferSize.
It also does not handle the case where compaction has finished and some other background job independently triggers ENOSPC.

Usage: Functionality is inside SstFileManager. In particular, users should set SstFileManager::SetMaxAllowedSpaceUsage, which is the reference highwatermark for determining whether to cancel compactions.
Closes https://github.com/facebook/rocksdb/pull/3449

Differential Revision: D7016941

Pulled By: amytai

fbshipit-source-id: 8965ab8dd8b00972e771637a41b4e6c645450445
2018-03-06 16:27:54 -08:00
Fosco Marotto d518fe1da6 uint64_t and size_t changes to compile for iOS
Summary:
In attempting to build a static lib for use in iOS, I ran in to lots of type errors between uint64_t and size_t.  This PR contains the changes I made to get `TARGET_OS=IOS make static_lib` to succeed while also getting Xcode to build successfully with the resulting `librocksdb.a` library imported.

This also compiles for me on macOS and tests fine, but I'm really not sure if I made the correct decisions about where to `static_cast` and where to change types.

Also up for discussion: is iOS worth supporting?  Getting the static lib is just part one, we aren't providing any bridging headers or wrappers like the ObjectiveRocks project, it won't be a great experience.
Closes https://github.com/facebook/rocksdb/pull/3503

Differential Revision: D7106457

Pulled By: gfosco

fbshipit-source-id: 82ac2073de7e1f09b91f6b4faea91d18bd311f8e
2018-03-06 12:43:51 -08:00
Dmitri Smirnov c364eb42b5 Windows cumulative patch
Summary:
This patch addressed several issues.
  Portability including db_test std::thread -> port::Thread Cc: @
  and %z to ROCKSDB portable macro. Cc: maysamyabandeh

  Implement Env::AreFilesSame

  Make the implementation of file unique number more robust

  Get rid of C-runtime and go directly to Windows API when dealing
  with file primitives.

  Implement GetSectorSize() and aling unbuffered read on the value if
  available.

  Adjust Windows Logger for the new interface, implement CloseImpl() Cc: anand1976

  Fix test running script issue where $status var was of incorrect scope
  so the failures were swallowed and not reported.

  DestroyDB() creates a logger and opens a LOG file in the directory
  being cleaned up. This holds a lock on the folder and the cleanup is
  prevented. This fails one of the checkpoin tests. We observe the same in production.
  We close the log file in this change.

 Fix DBTest2.ReadAmpBitmapLiveInCacheAfterDBClose failure where the test
 attempts to open a directory with NewRandomAccessFile which does not
 work on Windows.
  Fix DBTest.SoftLimit as it is dependent on thread timing. CC: yiwu-arbug
Closes https://github.com/facebook/rocksdb/pull/3552

Differential Revision: D7156304

Pulled By: siying

fbshipit-source-id: 43db0a757f1dfceffeb2b7988043156639173f5b
2018-03-06 11:57:43 -08:00
Andrew Kryczka 5d68243e61 Comment out unused variables
Summary:
Submitting on behalf of another employee.
Closes https://github.com/facebook/rocksdb/pull/3557

Differential Revision: D7146025

Pulled By: ajkr

fbshipit-source-id: 495ca5db5beec3789e671e26f78170957704e77e
2018-03-05 13:13:41 -08:00
Zhongyi Xie 92b1a68d87 fix FreeBSD build
Summary:
Currently FreeBSD build is broken in master and possibly some previous releases due to unrecognized symbol `O_DIRECT`.
This PR will fix the build on FreeBSD
Closes https://github.com/facebook/rocksdb/pull/3560

Differential Revision: D7148646

Pulled By: miasantreble

fbshipit-source-id: 95b6c3d310fa531267c086b2cd40a5ab1c042b5a
2018-03-05 11:12:28 -08:00
Anand Ananthabhotla dfbe52e099 Fix the Logger::Close() and DBImpl::Close() design pattern
Summary:
The recent Logger::Close() and DBImpl::Close() implementation rely on
calling the CloseImpl() virtual function from the destructor, which will
not work. Refactor the implementation to have a private close helper
function in derived classes that can be called by both CloseImpl() and
the destructor.
Closes https://github.com/facebook/rocksdb/pull/3528

Reviewed By: gfosco

Differential Revision: D7049303

Pulled By: anand1976

fbshipit-source-id: 76a64cbf403209216dfe4864ecf96b5d7f3db9f4
2018-02-23 13:57:26 -08:00
Igor Sugak aba3409740 Back out "[codemod] - comment out unused parameters"
Reviewed By: igorsugak

fbshipit-source-id: 4a93675cc1931089ddd574cacdb15d228b1e5f37
2018-02-22 12:43:17 -08:00
David Lai f4a030ce81 - comment out unused parameters
Reviewed By: everiq, igorsugak

Differential Revision: D7046710

fbshipit-source-id: 8e10b1f1e2aecebbfb229c742e214db887e5a461
2018-02-22 09:44:23 -08:00
jsteemann 4e7a182d09 Several small "fixes"
Summary:
- removed a few unneeded variables
- fused some variable declarations and their assignments
- fixed right-trimming code in string_util.cc to not underflow
- simplifed an assertion
- move non-nullptr check assertion before dereferencing of that pointer
- pass an std::string function parameter by const reference instead of by value (avoiding potential copy)
Closes https://github.com/facebook/rocksdb/pull/3507

Differential Revision: D7004679

Pulled By: sagar0

fbshipit-source-id: 52944952d9b56dfcac3bea3cd7878e315bb563c4
2018-02-15 16:57:37 -08:00