Summary:
We continually rebuilt build_version.c because we put the
current date into it, but that's what __DATE__ already is.  This makes
builds faster.

This also fixes an issue with 'make clean FOO' not working properly.

Also tweak the build rules to be more consistent, always have warnings,
and add a 'make release' rule to handle flags for release builds.

Test Plan: make, make clean

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D8139

Summary:
On some filesystems, pre-allocation can be a considerable
amount of space.  xfs in our production environment pre-allocates by
1GB, for instance.  By using fallocate to inform the kernel of our
expected file sizes, we eliminate this wasteage (that isn't recovered
until the file is closed which, in the case of LOG files, can be a
considerable amount of time).

Test Plan:
created an xfs loopback filesystem, mounted with
allocsize=4M, and ran db_stress.  LOG file without this change was 4M,
and with it it was 128k then grew to normal size.

Reviewers: dhruba

Reviewed By: dhruba

CC: adsharma, leveldb

Differential Revision: https://reviews.facebook.net/D7953

Summary:
Replace manual memory management with std::unique_ptr in a
number of places; not exhaustive, but this fixes a few leaks with file
handles as well as clarifies semantics of the ownership of file handles
with log classes.

Test Plan: db_stress, make check

Reviewers: dhruba

Reviewed By: dhruba

CC: zshao, leveldb, heyongqiang

Differential Revision: https://reviews.facebook.net/D8043

Summary:
In `Table::BlockReader()` when there was no block cache `didIO` was not set.

This didn't seem to matter as `didIO` is only used to trigger seek compactions. However, I would like it if someone else could check that is the case.

Test Plan: `make check OPT="-g -O3"`

Reviewers: dhruba, vamsi

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D8133

Summary: Add Tickers to count Write's and Get's

Test Plan: make check

Reviewers: dhruba, chip

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7977

Summary:
Found issues with `db_test` and `db_stress` when running valgrind.

`DBImpl` had an issue where if an compaction failed then it will use the uninitialised file size of an output file is used. This manifested as the final call to output to the log in `DoCompactionWork()` branching on uninitialized memory (all the way down in printf's innards).

Test Plan:
Ran `valgrind --track_origins=yes ./db_test` and `valgrind ./db_stress` to see if issues disappeared.

Ran `make check` to see if there were no regressions.

Reviewers: vamsi, dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D8001

Summary:
Several fixes:
1) Use mktemp to create the files and directories
2) Take the stat file as an argument so that the buildservers
   can specify a file in the WORKSPACE and not in /tmp
3) Use nproc to set make -j value.
4) Check for valid values before sending to ODS
5) Cleanup the grep/cut pipeline to just use awk

Test Plan: Verify tests run and complete

Reviewers: sheki, dhruba

Reviewed By: sheki

Differential Revision: https://reviews.facebook.net/D7995

Summary: a function added to status.h to check whether Status::code is InvalidArgument and similarly for NotSupported state

Test Plan: visual inspection

Reviewers: heyongqiang, dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7989

Summary:
Check in LogAndApply if the file size is more than the limit set in
Options.
Things to consider : will this be expensive?

Test Plan: make all check. Inputs on a new unit test?

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7701

Run it for a shorter time.

Summary:
clang is an alternate compiler based on llvm.  It produces
nicer error messages and finds some bugs that gcc doesn't, such as the
size_t change in this file (which caused some write return values to be
misinterpreted!)

Clang isn't the default; to try it, do "USE_CLANG=1 make" or "export
USE_CLANG=1" then make as normal

Test Plan: "make check" and "USE_CLANG=1 make check"

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D7899

Summary: Mis-merged from HEAD, had a duplicate declaration.

Test Plan: make -j32 OPT=-g

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D7911

Summary: Due to how the code handled compactions in Level 0 in `PickCompaction()` it could be the case that two compactions on level 0 ran that produced tables in level 1 that overlap. However, this case seems like it would only occur on a seek compaction which is unlikely on level 0. Furthermore, level 0 and level 1 had to have a certain arrangement of files.

Test Plan:
make check

Reviewers: dhruba, vamsi

Reviewed By: dhruba

CC: leveldb, sheki

Differential Revision: https://reviews.facebook.net/D7923

/data/users/abhishekk

Summary:
Basic Regression test.
Plan to run this every-night and record qps in ods.

Test Plan: ran locally and checked

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7929

Summary:
Specific changes:

1) Turn on -Werror so all warnings are errors
2) Fix some warnings the above now complains about
3) Add proper dependency support so changing a .h file forces a .c file
to rebuild
4) Automatically use fbcode gcc on any internal machine rather than
whatever system compiler is laying around
5) Fix jemalloc to once again be used in the builds (seemed like it
wasn't being?)
6) Fix issue where 'git' would fail in build_detect_version because of
LD_LIBRARY_PATH being set in the third-party build system

Test Plan:
make, make check, make clean, touch a header file, make sure
rebuild is expected

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D7887

Test Plan: compile

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7857

Summary:
Pretty much a blind copy of the patch in open source.
Hope to get this in before we make a release

Test Plan: make clean check

Reviewers: dhruba, heyongqiang

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7809

Summary: Ran ./build_java.sh bump_version 1.5.7

Test Plan: automated change

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7833

Summary:
`Table::Open()` assumes that `size` correctly describes the size of `file`, added a check that the footer is actually the right size and for good measure added assertions to `Footer::DecodeFrom()`.

This was discovered by running `valgrind ./db_test` and seeing that `Footer::DecodeFrom()` was accessing uninitialized memory.

Test Plan:
make clean check

ran `valgrind ./db_test` and saw DBTest.NoSpace no longer complains about a conditional jump being dependent on uninitialized memory.

Reviewers: dhruba, vamsi, emayanke, sheki

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7815

Summary:

Test Plan:

Reviewers:

CC:

Task ID: #

Blame Rev:

Summary:
The asserts introduced in https://reviews.facebook.net/D7629 are
wrong.

The direction of iteration is changed after the function call so they
assert's fail.

Test Plan: make clean check

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7827

Summary: Found some issues running Valgrind on `db_test` (there are still some outstanding ones) and fixed them.

Test Plan:
make check

ran `valgrind ./db_test` and saw that errors no longer occur

Reviewers: dhruba, vamsi, emayanke, sheki

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7803

Summary: `~ShardedLRUCache()` was empty despite `init()` allocating memory on the heap. Fixed the leak by freeing memory allocated by `init()`.

Test Plan:
make check

Ran valgrind on db_test before and after patch and saw leaked memory went down

Reviewers: vamsi, dhruba, emayanke, sheki

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7791

Summary:
This was a peformance regression caused by https://reviews.facebook.net/D6729.
The default value of max_grandparent_overlap_factor was erroneously
set to 0 in db_bench.

This was causing compactions to create really really small files because the max_grandparent_overlap_factor was erroneously set to zero in the benchmark.

Test Plan: Run --benchmarks=overwrite

Reviewers: heyongqiang, emayanke, sheki, MarkCallaghan

Reviewed By: sheki

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7797

Summary:
Changed CreateDir() to CreateDirIfMissing() so a directory that already exists now causes and error.

Fixed CreateDirIfMissing() and added Env.DirExists()

Test Plan:
make check to test for regessions

Ran the following to test if the error message is not about lock files not existing
./db_bench --db=dir/testdb

After creating a file "testdb", ran the following to see if it failed with sane error message:
./db_bench --db=testdb

Reviewers: dhruba, emayanke, vamsi, sheki

Reviewed By: emayanke

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7707

Summary:
Adds the option --seed to db_bench to specify the base for the per-thread RNG.
When not set each thread uses the same value across runs of db_bench which defeats
IO stress testing.

Adds the option --read_range. When set to a value > 1 an iterator is created and
each query done for the randomread benchmark will do a range scan for that many
rows. When not set or set to 1 the existing behavior (a point lookup) is done.

Fixes a bug where a printf format string was missing.

Test Plan: run db_bench

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7749

Summary:
`MemTableList::Add()` neglected to mention that it took ownership of the reference held by its caller.

The comment in `MemTable::Get()` was wrong in describing the format of the key.

Test Plan: None

Reviewers: dhruba, sheki, emayanke, vamsi

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7755

Summary:
Use a std::priority_queue in merger.cc instead of doing a o(n) search
every time.
Currently only the ForwardIteration uses a Priority Queue.

Test Plan: make all check

Reviewers: dhruba

Reviewed By: dhruba

CC: emayanke, zshao

Differential Revision: https://reviews.facebook.net/D7629

Summary:
There was a bug in the ExtendOverlappingInputs method so that
the terminating condition for the backward search was incorrect.

Test Plan: make clean check

Reviewers: sheki, emayanke, MarkCallaghan

Reviewed By: MarkCallaghan

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7725

Summary:
1. The thrift libraries do not need to be built anyore.
2. SSE is dynamically detected via
   https://github.com/facebook/rocksdb/commit/1aae609b920f8cd4d93ac49798fa96367b9b864c

Test Plan: compile and build

Reviewers: sheki, emayanke

Reviewed By: sheki

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7665

Summary:
There is a compilation error while using gcc 4.7.1.
util/ldb_cmd.cc:381:3: error: ‘leveldb::ReadOptions::ReadOptions’ names the constructor, not the type
util/ldb_cmd.cc:381:37: error: expected ‘;’ before ‘read_options’
util/ldb_cmd.cc:381:49: error: statement cannot resolve address of overloaded function

Test Plan: make clean check

Reviewers: sheki, emayanke, zshao

Reviewed By: emayanke

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7659

Summary: The queries will come from stdin.  One key per line.  The output will be in stdout, in the format of "<key> ==> <value>" if found, or "<key>" if not found.  "--hex" uses HEX-encoded keys and values in both input and output.

Test Plan: ldb query --db=leveldb_db --hex

Reviewers: dhruba, emayanke, sheki

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7617

Summary: We were ignoring additional chars at the end of an arg.  This can create confusion, e.g. --disable_wal=0 will act the same as --disable_wal without any warnings.

Test Plan:
Tried this:
[zshao@dev485 ~/git/rocksdb] ./ldb dump --statsAAA
Failed: Unknown argument:--statsAAA

Reviewers: dhruba, sheki, emayanke

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7635

Summary: The current parsing logic ignores any additional chars after the arg.

Test Plan: "./sst_dump --verify_checksumAAA" now outputs error.

Reviewers: dhruba, sheki, emayanke

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7611

Summary:
Create an Executable with
* A thread to do Put's
* A thread to use GetUpdatesSince. Check if we miss any sequence
  Numbers.

Test Plan: It runs.

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7383

Summary: ldb uses --output_hex so make manifest_dump do the same thing.

Test Plan:
[zshao@dev485 ~/git/rocksdb] ./manifest_dump --output_hex --file=/data/users/zshao/test_leveldb/MANIFEST-000034
manifest_file_number 42 next_file_number 43 last_sequence 2311567 log_number 36  prev_log_number 0
--- level 0 --- version# 0 ---
--- level 1 --- version# 0 ---
--- level 2 --- version# 0 ---
--- level 3 --- version# 0 ---
 5:27788699['0000027F4FBE0000' @ 1 : 1 .. '11CE749602C90000' @ 160642 : 1]
 7:27785313['11CE773DA7E00000' @ 160643 : 1 .. '23A4C63EC55D0000' @ 321094 : 1]
 9:27784288['23A4D581FCD30000' @ 321095 : 1 .. '3576291D12D00000' @ 481428 : 1]
 38:64378271['35762BF0E0CE0000' @ 481429 : 1 .. '5E987E0604700000' @ 852910 : 1]
 39:64379046['5E987EB0BDD50000' @ 852911 : 1 .. '87C954330E840000' @ 1224603 : 1]
 40:10169201['87C95507E49C0000' @ 1224604 : 1 .. '8E48DC0933B70000' @ 1283317 : 1]
 21:27798825['8E48DFB0D7CE0000' @ 1283318 : 1 .. 'A00675F8AD7E0000' @ 1443826 : 1]
 23:27793751['A006777536E30000' @ 1443827 : 1 .. 'B1D1787FE8670000' @ 1604553 : 1]
 25:27801659['B1D179289BB30000' @ 1604554 : 1 .. 'C396D3A69DCE0000' @ 1765012 : 1]
 27:27792661['C396DA1E03B10000' @ 1765013 : 1 .. 'D55C9974FCC10000' @ 1925513 : 1]
 29:27789095['D55C9B47CBC00000' @ 1925514 : 1 .. 'E71F67D11CCC0000' @ 2085789 : 1]
 31:27793145['E71F7A667E740000' @ 2085790 : 1 .. 'F8D4712EF3D90000' @ 2246454 : 1]
 41:11246031['F8D4715916A70000' @ 2246455 : 1 .. 'FFFFFCAE97DF0000' @ 2311567 : 1]
--- level 4 --- version# 0 ---
--- level 5 --- version# 0 ---
--- level 6 --- version# 0 ---

Reviewers: dhruba, sheki, emayanke

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7575

Summary: Now sst_dump has the same option --output_hex as "ldb dump" and also share the same output format.  So we can do "sst_dump ... | ldb load ..." for an experiment.

Test Plan:
[zshao@dev485 ~/git/rocksdb] ./sst_dump --file=/data/users/zshao/test_leveldb/000005.sst  --output_hex | head -n 2
0000027F4FBE00000101000000000000 ==> D901000000000000000057596F7520726563656976656420746F6461792773207370656369616C20676966742120436C69636B2041636365707420746F207669657720796F75722047696674206265666F72652069742064697361707065617273210000000000000000
000007F9C2D400000102000000000000 ==> 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

Reviewers: dhruba, sheki, emayanke

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7587

Summary:
This allows ldb to control the write_buffer_size (which reflects to L0 file size) and file_size (which reflects to L1 file size).  Since the target_file_size_ratio is 1 by default, all other levels will also have the same file size as L1.

As part of the diff, I also cleaned up some unused code and help messages.

Test Plan: ./ldb load --db=/data/users/zshao/test_leveldb --file_size=64000000 --write_buffer_size=32000000 --create_if_missing --input_hex --disable_wal

Reviewers: dhruba, sheki, emayanke

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7569

Test Plan: make all check

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb, zshao

Differential Revision: https://reviews.facebook.net/D7503