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Summary: **Context:** Some existing internal calls of `GenericRateLimiter::Request()` in backupable_db.cc and newly added internal calls in https://github.com/facebook/rocksdb/pull/8722/ do not make sure `bytes <= GetSingleBurstBytes()` as required by rate_limiter https://github.com/facebook/rocksdb/blob/master/include/rocksdb/rate_limiter.h#L47. **Impacts of this bug include:** (1) In debug build, when `GenericRateLimiter::Request()` requests bytes greater than `GenericRateLimiter:: kMinRefillBytesPerPeriod = 100` byte, process will crash due to assertion failure. See https://github.com/facebook/rocksdb/pull/9063#discussion_r737034133 and for possible scenario (2) In production build, although there will not be the above crash due to disabled assertion, the bug can lead to a request of small bytes being blocked for a long time by a request of same priority with insanely large bytes from a different thread. See updated https://github.com/facebook/rocksdb/wiki/Rate-Limiter ("Notice that although....the maximum bytes that can be granted in a single request have to be bounded...") for more info. There is an on-going effort to move rate-limiting to file wrapper level so rate limiting in `BackupEngine` and this PR might be made obsolete in the future. **Summary:** - Implemented loop-calling `GenericRateLimiter::Request()` with `bytes <= GetSingleBurstBytes()` as a static private helper function `BackupEngineImpl::LoopRateLimitRequestHelper` -- Considering make this a util function in `RateLimiter` later or do something with `RateLimiter::RequestToken()` - Replaced buggy internal callers with this helper function wherever requested byte is not pre-limited by `GetSingleBurstBytes()` - Removed the minimum refill bytes per period enforced by `GenericRateLimiter` since it is useless and prevents testing `GenericRateLimiter` for extreme case with small refill bytes per period. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9063 Test Plan: - Added a new test that failed the assertion before this change and now passes - It exposed bugs in [the write during creation in `CopyOrCreateFile()`]( |
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| .. | ||
| backupable | ||
| blob_db | ||
| cassandra | ||
| checkpoint | ||
| compaction_filters | ||
| convenience | ||
| leveldb_options | ||
| memory | ||
| merge_operators | ||
| option_change_migration | ||
| options | ||
| persistent_cache | ||
| simulator_cache | ||
| table_properties_collectors | ||
| trace | ||
| transactions | ||
| ttl | ||
| write_batch_with_index | ||
| cache_dump_load.cc | ||
| cache_dump_load_impl.cc | ||
| cache_dump_load_impl.h | ||
| compaction_filters.cc | ||
| debug.cc | ||
| env_librados.cc | ||
| env_librados.md | ||
| env_librados_test.cc | ||
| env_mirror.cc | ||
| env_mirror_test.cc | ||
| env_timed.cc | ||
| env_timed.h | ||
| env_timed_test.cc | ||
| fault_injection_env.cc | ||
| fault_injection_env.h | ||
| fault_injection_fs.cc | ||
| fault_injection_fs.h | ||
| fault_injection_secondary_cache.cc | ||
| fault_injection_secondary_cache.h | ||
| merge_operators.cc | ||
| merge_operators.h | ||
| object_registry.cc | ||
| object_registry_test.cc | ||
| util_merge_operators_test.cc | ||
| wal_filter.cc | ||