Commit Graph

4 Commits

Author SHA1 Message Date
Cheng Chang
5fd152b7ad Get block size only in direct IO mode (#6522)
Summary:
When `use_direct_reads` and `use_direct_writes` are `false`, `logical_sector_size_` inside various `*File` implementations are not actually used, so `GetLogicalBlockSize` does not necessarily need to be called for `logical_sector_size_`, just set a default page size.

This is a follow up PR for https://github.com/facebook/rocksdb/pull/6457.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6522

Test Plan: make check

Reviewed By: siying

Differential Revision: D20408885

Pulled By: cheng-chang

fbshipit-source-id: f2d3808f41265237e7fa2c0be9f084f8fa97fe3d
2020-03-20 15:26:10 -07:00
Cheng Chang
23eae14d24 Destroy DB at the end of each test in db_logical_block_size_cache_test (#6532)
Summary:
If DB is not deleted, in concurrent test, the tests might fail because of the previously existing DB.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6532

Test Plan:
make clean && make -j24 LITE=1  db_logical_block_size_cache_test && ./db_logical_block_size_cache_test
make clean && make -j24 db_logical_block_size_cache_test && ./db_logical_block_size_cache_test

Differential Revision: D20454734

Pulled By: cheng-chang

fbshipit-source-id: 8abede2ec1d79c1a4fe1bc95fbda489f8f7ee052
2020-03-13 21:53:38 -07:00
Cheng Chang
0d2c8e47e8 OpenForReadOnly is not supported in LITE mode (#6523)
Summary:
In DBLogicalBlockSizeCacheTest, do not test OpenForReadOnly in LITE mode.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6523

Test Plan: watch test for LITE mode

Differential Revision: D20420321

Pulled By: cheng-chang

fbshipit-source-id: e45bf6f2800206d6f8ce9af7308e76a08de80643
2020-03-12 14:13:59 -07:00
Cheng Chang
2d9efc9ab2 Cache result of GetLogicalBufferSize in Linux (#6457)
Summary:
In Linux, when reopening DB with many SST files, profiling shows that 100% system cpu time spent for a couple of seconds for `GetLogicalBufferSize`. This slows down MyRocks' recovery time when site is down.

This PR introduces two new APIs:
1. `Env::RegisterDbPaths` and `Env::UnregisterDbPaths` lets `DB` tell the env when it starts or stops using its database directories . The `PosixFileSystem` takes this opportunity to set up a cache from database directories to the corresponding logical block sizes.
2. `LogicalBlockSizeCache` is defined only for OS_LINUX to cache the logical block sizes.

Other modifications:
1. rename `logical buffer size` to `logical block size` to be consistent with Linux terms.
2. declare `GetLogicalBlockSize` in `PosixHelper` to expose it to `PosixFileSystem`.
3. change the functions `IOError` and `IOStatus` in `env/io_posix.h` to have external linkage since they are used in other translation units too.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6457

Test Plan:
1. A new unit test is added for `LogicalBlockSizeCache` in `env/io_posix_test.cc`.
2. A new integration test is added for `DB` operations related to the cache in `db/db_logical_block_size_cache_test.cc`.

`make check`

Differential Revision: D20131243

Pulled By: cheng-chang

fbshipit-source-id: 3077c50f8065c0bffb544d8f49fb10bba9408d04
2020-03-11 18:40:05 -07:00