863c78d2c9
Summary: This fixes two bugs in the recently committed DB verification following crash-recovery with unsynced data loss (https://github.com/facebook/rocksdb/issues/8966): The first bug was in crash test runs involving mixed values for `-test_batches_snapshots`. The problem was we were neither restoring expected values nor enabling tracing when `-test_batches_snapshots=1`. This caused a future `-test_batches_snapshots=0` run to not find enough trace data to restore expected values. The fix is to restore expected values at the start of `-test_batches_snapshots=1` runs, but still leave tracing disabled as we do not need to track those KVs. The second bug was in `db_stress` runs that restore the expected values file and use compaction filter. The compaction filter was initialized to use the pre-restore expected values, which would be `munmap()`'d during `FileExpectedStateManager::Restore()`. Then compaction filter would run into a segfault. The fix is just to reorder compaction filter init after expected values restore. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9302 Test Plan: - To verify the first problem, the below sequence used to fail; now it passes. ``` $ ./db_stress --db=./test-db/ --expected_values_dir=./test-db-expected/ --max_key=100000 --ops_per_thread=1000 --sync_fault_injection=1 --clear_column_family_one_in=0 --destroy_db_initially=0 -reopen=0 -test_batches_snapshots=0 $ ./db_stress --db=./test-db/ --expected_values_dir=./test-db-expected/ --max_key=100000 --ops_per_thread=1000 --sync_fault_injection=1 --clear_column_family_one_in=0 --destroy_db_initially=0 -reopen=0 -test_batches_snapshots=1 $ ./db_stress --db=./test-db/ --expected_values_dir=./test-db-expected/ --max_key=100000 --ops_per_thread=1000 --sync_fault_injection=1 --clear_column_family_one_in=0 --destroy_db_initially=0 -reopen=0 -test_batches_snapshots=0 ``` - The second problem occurred rarely in the form of a SIGSEGV on a file that was `munmap()`d. I have not seen it after this PR though this doesn't prove much. Reviewed By: jay-zhuang Differential Revision: D33155283 Pulled By: ajkr fbshipit-source-id: 66fd0f0edf34015a010c30015f14f104734e964e |
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| file | ||
| fuzz | ||
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| table | ||
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| AUTHORS | ||
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| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| DEFAULT_OPTIONS_HISTORY.md | ||
| defs.bzl | ||
| DUMP_FORMAT.md | ||
| HISTORY.md | ||
| INSTALL.md | ||
| issue_template.md | ||
| LANGUAGE-BINDINGS.md | ||
| LICENSE.Apache | ||
| LICENSE.leveldb | ||
| Makefile | ||
| PLUGINS.md | ||
| README.md | ||
| ROCKSDB_LITE.md | ||
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RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)
This code is a library that forms the core building block for a fast key-value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it especially suitable for storing multiple terabytes of data in a single database.
Start with example usage here: https://github.com/facebook/rocksdb/tree/main/examples
See the github wiki for more explanation.
The public interface is in include/. Callers should not include or
rely on the details of any other header files in this package. Those
internal APIs may be changed without warning.
Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/ and https://rocksdb.slack.com/
License
RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.