Summary:
Add ROCKSDB_VALGRIND_RUN macro and suppress false-positive "unimplemented functionality" throw by valgrind for steam hints.

Another approach would be add a valgrind suppress file. Valgrind is suppose to print the suppression when given "--gen-suppressions=all" param, which is suppose to be the content for the suppression file. But it doesn't print.
Closes https://github.com/facebook/rocksdb/pull/3174

Differential Revision: D6338786

Pulled By: yiwu-arbug

fbshipit-source-id: 3559efa5f3b92d40d09ad6ac82bc7b59f86c75aa

Summary:
Refactor the logic around WriteCallback in the write path to clarify when and how exactly we advance the sequence number and making sure it is consistent across the code.
Closes https://github.com/facebook/rocksdb/pull/3168

Differential Revision: D6324312

Pulled By: maysamyabandeh

fbshipit-source-id: 9a34f479561fdb2a5d01ef6d37a28908d03bbe33

Summary:
The sequence number was not properly advanced after a rollback marker. The patch extends the existing unit tests to detect the bug and also fixes it.
Closes https://github.com/facebook/rocksdb/pull/3157

Differential Revision: D6304291

Pulled By: maysamyabandeh

fbshipit-source-id: 1b519c44a5371b802da49c9e32bd00087a8da401

Summary:
When testing rebuilding_trx_ in MemTableInserter might still be set before the tests finishes which would cause ASAN alarms for leaks. This patch deletes the pointers in MemTableInserter destructor.
Closes https://github.com/facebook/rocksdb/pull/3162

Differential Revision: D6317113

Pulled By: maysamyabandeh

fbshipit-source-id: a68be70709a4fff7ac2b768660119311968f9c21

Summary:
We hit "Illegal instruction" error in regression test with "shlx" instruction. Setting PORTABLE=1 to resolve it.
Closes https://github.com/facebook/rocksdb/pull/3165

Differential Revision: D6321972

Pulled By: yiwu-arbug

fbshipit-source-id: cc9fe0dbd4698d1b66a750a0b062f66899862719

Summary:
The current implementation of PinnableSlice move assignment have an issue #3163. We are moving away from it instead of try to get the move assignment right, since it is too tricky.
Closes https://github.com/facebook/rocksdb/pull/3164

Differential Revision: D6319201

Pulled By: yiwu-arbug

fbshipit-source-id: 8f3279021f3710da4a4caa14fd238ed2df902c48

Summary:
This patch clarifies and refactors the logic around tracked keys in transactions.
Closes https://github.com/facebook/rocksdb/pull/3140

Differential Revision: D6290258

Pulled By: maysamyabandeh

fbshipit-source-id: 03b50646264cbcc550813c060b180fc7451a55c1

Summary:
Add tests to ensure that WritePrepared and WriteCommitted policies are cross compatible when the db WAL is empty. This is important when the admin want to switch between the policies. In such case, before the switch the admin needs to empty the WAL by i) committing/rollbacking all the pending transactions, ii) FlushMemTables
Closes https://github.com/facebook/rocksdb/pull/3118

Differential Revision: D6227247

Pulled By: maysamyabandeh

fbshipit-source-id: bcde3d92c1e89cda3b9cfa69f6a20af5d8993db7

Summary:
Summary of changes:
- Move seq_per_batch out of Options
- Rename concurrent_prepare to two_write_queues
- Add allocate_seq_only_for_data_
Closes https://github.com/facebook/rocksdb/pull/3136

Differential Revision: D6304458

Pulled By: maysamyabandeh

fbshipit-source-id: 08e685bfa82bbc41b5b1c5eb7040a8ca6e05e58c

Summary:
If possible, use -march or -mcpu to get enable all features available on the local CPU or architecture. Only if this is impossible, we will manually set -msse4.2. It should be safe as there'll be a warning printed if `USE_SSE` is set and the provided flags are insufficient to support SSE4.2.
Closes https://github.com/facebook/rocksdb/pull/3156

Differential Revision: D6304703

Pulled By: ajkr

fbshipit-source-id: 030a53491263300cae7fafb429114d87acc828ef

Summary:
Add per-exe execution capability
  Add fix parsing of groups/tests
  Add timer test exclusion

 Fix unit tests
  Ifdef threadpool specific tests that do not pass on Vista threadpool.
  Remove spurious outout from prefix_test so test case listing works
  properly.
  Fix not using standard test directories results in file creation errors
  in sst_dump_test.

  BlobDb fixes:
    In C++ end() iterators can not be dereferenced. They are not valid.
	When deleting blob_db_ set it to nullptr before any other code executes.
	Not fixed:. On Windows you can not delete a file while it is open.
	[ RUN      ] BlobDBTest.ReadWhileGC
	d:\dev\rocksdb\rocksdb\utilities\blob_db\blob_db_test.cc(75): error: DestroyBlobDB(dbname_, options, bdb_options)
	IO error: Failed to delete: d:/mnt/db\testrocksdb-17444/blob_db_test/blob_dir/000001.blob: Permission denied
	d:\dev\rocksdb\rocksdb\utilities\blob_db\blob_db_test.cc(75): error: DestroyBlobDB(dbname_, options, bdb_options)
	IO error: Failed to delete: d:/mnt/db\testrocksdb-17444/blob_db_test/blob_dir/000001.blob: Permission denied

  write_batch
    Should not call front() if there is a chance the container is empty
Closes https://github.com/facebook/rocksdb/pull/3152

Differential Revision: D6293274

Pulled By: sagar0

fbshipit-source-id: 318c3717c22087fae13b18715dffb24565dbd956

Summary:
Add a simple policy for NVMe write time life hint
Closes https://github.com/facebook/rocksdb/pull/3095

Differential Revision: D6298030

Pulled By: shligit

fbshipit-source-id: 9a72a42e32e92193af11599eb71f0cf77448e24d

Summary: Closes https://github.com/facebook/rocksdb/pull/3151

Differential Revision: D6293861

Pulled By: ajkr

fbshipit-source-id: f8db0a71509d1cd8237f2d377bf9e1bb0464bdbf

Summary:
The previous compression type selection caused unexpected behavior when the base level was also the bottommost level. The following sequence of events could happen:

- full compaction generates files with `bottommost_compression` type
- now base level is bottommost level since all files are in the same level
- any compaction causes files to be rewritten `compression_per_level` type since bottommost compression didn't apply to base level

I changed the code to make bottommost compression apply to base level.
Closes https://github.com/facebook/rocksdb/pull/3141

Differential Revision: D6264614

Pulled By: ajkr

fbshipit-source-id: d7aaa8675126896684154a1f2c9034d6214fde82

Summary:
A race condition will happen when:
* a user thread writes a value, but it hits the write stop condition because there are too many un-flushed memtables, while holding blob_db_impl.write_mutex_.
* Flush is triggered and call flush begin listener and try to acquire blob_db_impl.write_mutex_.

Fixing it.
Closes https://github.com/facebook/rocksdb/pull/3149

Differential Revision: D6279805

Pulled By: yiwu-arbug

fbshipit-source-id: 0e3c58afb78795ebe3360a2c69e05651e3908c40

Summary:
`compression` shadow the method name in `BlobFile`. Rename it.
Closes https://github.com/facebook/rocksdb/pull/3148

Differential Revision: D6274498

Pulled By: yiwu-arbug

fbshipit-source-id: 7d293596530998b23b6b8a8940f983f9b6343a98

Summary:
To fix the issue of failing to decompress existing value after reopen DB with a different compression settings.
Closes https://github.com/facebook/rocksdb/pull/3142

Differential Revision: D6267260

Pulled By: yiwu-arbug

fbshipit-source-id: c7cf7f3e33b0cd25520abf4771cdf9180cc02a5f

Summary:
- moved existing compression options to `InitializeOptionsGeneral` since they cannot be set through options file
- added flag for `zstd_max_train_bytes` which was recently introduced by #3057
Closes https://github.com/facebook/rocksdb/pull/3128

Differential Revision: D6240460

Pulled By: ajkr

fbshipit-source-id: 27dbebd86a55de237ba6a45cc79cff9214e82ebc

Summary:
Without this option, running the compact benchmark on a DB containing only bottommost files simply returned immediately.
Closes https://github.com/facebook/rocksdb/pull/3138

Differential Revision: D6256660

Pulled By: ajkr

fbshipit-source-id: e3b64543acd503d821066f4200daa201d4fb3a9d

Summary:
Adds two new counters:

`key_lock_wait_count` counts how many times a lock was blocked by another transaction and had to wait, instead of being granted the lock immediately.
`key_lock_wait_time` counts the time spent acquiring locks.
Closes https://github.com/facebook/rocksdb/pull/3107

Differential Revision: D6217332

Pulled By: lth

fbshipit-source-id: 55d4f46da5550c333e523263422fd61d6a46deb9

Summary:
After move assignment, we need to re-initialized the moved PinnableSlice.

Also update blob_db_impl.cc to not reuse the moved PinnableSlice since it is supposed to be in an undefined state after move.
Closes https://github.com/facebook/rocksdb/pull/3127

Differential Revision: D6238585

Pulled By: yiwu-arbug

fbshipit-source-id: bd99f2e37406c4f7de160c7dee6a2e8126bc224e

Summary:
While investigating the usage of `new_table_iterator_nanos` perf counter, I saw some code was wrapper around with unnecessary status check ... so removed it.
Closes https://github.com/facebook/rocksdb/pull/3120

Differential Revision: D6229181

Pulled By: sagar0

fbshipit-source-id: f8a44fe67f5a05df94553fdb233b21e54e88cc34

Summary:
util/concurrent_arena.h:
CID 1396145 (#1 of 1): Uninitialized pointer field (UNINIT_CTOR)
2. uninit_member: Non-static class member free_begin_ is not initialized in this constructor nor in any functions that it calls.
 94    Shard() : allocated_and_unused_(0) {}

util/dynamic_bloom.cc:
	1. Condition hash_func == NULL, taking true branch.

CID 1322821 (#1 of 1): Uninitialized pointer field (UNINIT_CTOR)
3. uninit_member: Non-static class member data_ is not initialized in this constructor nor in any functions that it calls.
47      hash_func_(hash_func == nullptr ? &BloomHash : hash_func) {}
48

util/file_reader_writer.h:
204 private:
205  AlignedBuffer buffer_;
   	member_not_init_in_gen_ctor: The compiler-generated constructor for this class does not initialize buffer_offset_.
206  uint64_t buffer_offset_;

CID 1418246 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
member_not_init_in_gen_ctor: The compiler-generated constructor for this class does not initialize buffer_len_.
207  size_t buffer_len_;
208};

util/thread_local.cc:
341#endif

CID 1322795 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
3. uninit_member: Non-static class member pthread_key_ is not initialized in this constructor nor in any functions that it calls.
342}

40struct ThreadData {
   	2. uninit_member: Non-static class member next is not initialized in this constructor nor in any functions that it calls.

CID 1400668 (#1 of 1): Uninitialized pointer field (UNINIT_CTOR)
4. uninit_member: Non-static class member prev is not initialized in this constructor nor in any functions that it calls.
 41  explicit ThreadData(ThreadLocalPtr::StaticMeta* _inst) : entries(), inst(_inst) {}
 42  std::vector<Entry> entries;
   	1. member_decl: Class member declaration for next.
 43  ThreadData* next;
   	3. member_decl: Class member declaration for prev.
 44  ThreadData* prev;
 45  ThreadLocalPtr::StaticMeta* inst;
 46};
Closes https://github.com/facebook/rocksdb/pull/3123

Differential Revision: D6233566

Pulled By: sagar0

fbshipit-source-id: aa2068790ea69787a0035c0db39d59b0c25108db

Summary:
copied from internal diff D6156261
Closes https://github.com/facebook/rocksdb/pull/3124

Differential Revision: D6230167

Pulled By: ajkr

fbshipit-source-id: 17926bb1152d607556364e3aacfec0ef3c115748

Summary:
Fix cast from size_t to unsigned int.
Closes https://github.com/facebook/rocksdb/pull/3125

Differential Revision: D6232863

Pulled By: yiwu-arbug

fbshipit-source-id: 4c6131168b1faec26f7820b2cf4a09c242d323b7

Summary:
Fix unreleased snapshot at the end of the test.
Closes https://github.com/facebook/rocksdb/pull/3126

Differential Revision: D6232867

Pulled By: yiwu-arbug

fbshipit-source-id: 651ca3144fc573ea2ab0ab20f0a752fb4a101d26

Summary:
Instead of using samples directly, we now support passing the samples through zstd's dictionary generator when `CompressionOptions::zstd_max_train_bytes` is set to nonzero. If set to zero, we will use the samples directly as the dictionary -- same as before.

Note this is the first step of #2987, extracted into a separate PR per reviewer request.
Closes https://github.com/facebook/rocksdb/pull/3057

Differential Revision: D6116891

Pulled By: ajkr

fbshipit-source-id: 70ab13cc4c734fa02e554180eed0618b75255497

Summary:
Previously setting `write_buffer_size` with `SetOptions` would only apply to new memtables. An internal user wanted it to take effect immediately, instead of at an arbitrary future point, to prevent OOM.

This PR makes the memtable's size mutable, and makes `SetOptions()` mutate it. There is one case when we preserve the old behavior, which is when memtable prefix bloom filter is enabled and the user is increasing the memtable's capacity. That's because the prefix bloom filter's size is fixed and wouldn't work as well on a larger memtable.
Closes https://github.com/facebook/rocksdb/pull/3119

Differential Revision: D6228304

Pulled By: ajkr

fbshipit-source-id: e44bd9d10a5f8c9d8c464bf7436070bb3eafdfc9

Summary: Closes https://github.com/facebook/rocksdb/pull/3121

Differential Revision: D6229415

Pulled By: miasantreble

fbshipit-source-id: 57c7ad2fddf5dd6b8d7e3aaf6f62348151327dfb

Summary:
include/rocksdb/metadata.h:
struct ColumnFamilyMetaData {

CID 1322804 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
2. uninit_member: Non-static class member file_count is not initialized in this constructor nor in any functions that it calls.

struct SstFileMetaData {
        2. uninit_member: Non-static class member size is not initialized in this constructor nor in any functions that it calls.
        4. uninit_member: Non-static class member smallest_seqno is not initialized in this constructor nor in any functions that it calls.
        6. uninit_member: Non-static class member largest_seqno is not initialized in this constructor nor in any functions that it calls.
        8. uninit_member: Non-static class member num_reads_sampled is not initialized in this constructor nor in any functions that it calls.

CID 1322807 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
10. uninit_member: Non-static class member being_compacted is not initialized in this constructor nor in any functions that it calls.

include/rocksdb/sst_file_writer.h:
struct ExternalSstFileInfo {
        2. uninit_member: Non-static class member sequence_number is not initialized in this constructor nor in any functions that it calls.
        4. uninit_member: Non-static class member file_size is not initialized in this constructor nor in any functions that it calls.
        6. uninit_member: Non-static class member num_entries is not initialized in this constructor nor in any functions that it calls.

CID 1351697 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
8. uninit_member: Non-static class member version is not initialized in this constructor nor in any functions that it calls.
 31  ExternalSstFileInfo() {}

include/rocksdb/utilities/transaction.h:
explicit Transaction(const TransactionDB* db) {}
        2. uninit_member: Non-static class member log_number_ is not initialized in this constructor nor in any functions that it calls.

CID 1396133 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member field txn_state_._M_i is not initialized in this constructor nor in any functions that it calls.
473  Transaction() {}
Closes https://github.com/facebook/rocksdb/pull/3100

Differential Revision: D6227651

Pulled By: sagar0

fbshipit-source-id: 5caa4a2cf9471d1f9c3c073f81473636e1f0aa14

Summary:
After adding expiration to blob index in #3066, we are now able to add a compaction filter to cleanup expired blob index entries.
Closes https://github.com/facebook/rocksdb/pull/3090

Differential Revision: D6183812

Pulled By: yiwu-arbug

fbshipit-source-id: 9cb03267a9702975290e758c9c176a2c03530b83

Summary:
This options was introduced in the C++ API in #1953 .
Closes https://github.com/facebook/rocksdb/pull/3064

Differential Revision: D6139010

Pulled By: sagar0

fbshipit-source-id: 164de11d539d174cf3afe7cd40e667049f44b0bc

Summary:
Blob db will keep blob file if data in the file is visible to an active snapshot. Before this patch it checks whether there is an active snapshot has sequence number greater than the earliest sequence in the file. This is problematic since we take snapshot on every read, if it keep having reads, old blob files will not be cleanup. Change to check if there is an active snapshot falls in the range of [earliest_sequence, obsolete_sequence) where obsolete sequence is
1. if data is relocated to another file by garbage collection, it is the latest sequence at the time garbage collection finish
2. otherwise, it is the latest sequence of the file
Closes https://github.com/facebook/rocksdb/pull/3087

Differential Revision: D6182519

Pulled By: yiwu-arbug

fbshipit-source-id: cdf4c35281f782eb2a9ad6a87b6727bbdff27a45

Summary:
Add an option to enable/disable auto garbage collection, where we keep counting how many keys have been evicted by either deletion or compaction and decide whether to garbage collect a blob file.

Default disable auto garbage collection for now since the whole logic is not fully tested and we plan to make major change to it.
Closes https://github.com/facebook/rocksdb/pull/3117

Differential Revision: D6224756

Pulled By: yiwu-arbug

fbshipit-source-id: cdf53bdccec96a4580a2b3a342110ad9e8864dfe

Summary:
The test intent to wait until key being overwritten until proceed with garbage collection. It failed to wait for `PutUntil` finally finish. Fixing it.
Closes https://github.com/facebook/rocksdb/pull/3116

Differential Revision: D6222833

Pulled By: yiwu-arbug

fbshipit-source-id: fa9b57a772b92a66cf250b44e7975c43f62f45c5

Summary:
Evict oldest blob file and put it in obsolete_files list when close to blob db size limit. The file will be delete when the `DeleteObsoleteFiles` background job runs next time.
For now I set `kEvictOldestFileAtSize` constant, which controls when to evict the oldest file, at 90%. It could be tweaked or made into an option if really needed; I didn't want to expose it as an option pre-maturely as there are already too many :) .
Closes https://github.com/facebook/rocksdb/pull/3094

Differential Revision: D6187340

Pulled By: sagar0

fbshipit-source-id: 687f8262101b9301bf964b94025a2fe9d8573421

Summary:
The num() might return cur_num as 0 and we are making sure that
cur_num will not be 0 down the path. The mult variable is being set to
100.0/cur_num which makes program crash when cur_num is 0.
Closes https://github.com/facebook/rocksdb/pull/3105

Differential Revision: D6222594

Pulled By: ajkr

fbshipit-source-id: 986154709897ff4dbbeb0e8aa81eb8c0b2a2db76

Summary:
This patch will remove the existing comments that declare partitioning indexes and filters as experimental.
Closes https://github.com/facebook/rocksdb/pull/3115

Differential Revision: D6222227

Pulled By: maysamyabandeh

fbshipit-source-id: 6179ec43b22c518494051b674d91c9e1b54d4ac0

Summary:
Move  WritePreparedTxnDB from pessimistic_transaction_db.h to its own header, write_prepared_txn_db.h
Closes https://github.com/facebook/rocksdb/pull/3114

Differential Revision: D6220987

Pulled By: maysamyabandeh

fbshipit-source-id: 18893fb4fdc6b809fe117dabb544080f9b4a301b

Summary:
It's also defined in db/dbformat.cc per 7fe3b328
Closes https://github.com/facebook/rocksdb/pull/3111

Differential Revision: D6219140

Pulled By: ajkr

fbshipit-source-id: 0f2b14e41457334a4665c6b7e3f42f1a060a0f35