Xingbo Wang
521cd8b31d
Summary: - Add `tools/gtest_parallel_repro.py` to reproduce gtest flaky tests that depend on process-level CPU contention and scheduler delays. - Run many fresh gtest processes concurrently, isolate each process with its own `TEST_TMPDIR`, and optionally pin the workload to a smaller CPU set with `taskset`. - Record per-run logs, write `failures.jsonl`, summarize failure keys, support stopping on first failed batch, and optionally rebuild with `COERCE_CONTEXT_SWITCH=1`. - Document when to use the runner in `CLAUDE.md` for CI-style flaky tests that single-process `--gtest_repeat` or coerce mode alone does not reproduce. - Using the new runner, we found and fixed one flaky test and improved c_test harness - Flaky test: EnvPosixTest.ReadAsyncQueueFull simulated a full io_uring submission queue by overwriting the SQE pointer after io_uring_get_sqe() had already consumed a submission slot. That left stale state in the thread-local ring, so later AbortIO tests could process an unexpected completion and crash. Add a skip_io_uring_get_sqe syncpoint before the io_uring_get_sqe() call and use it from the test so the Busy path is exercised without mutating the ring. Pull Request resolved: https://github.com/facebook/rocksdb/pull/14827 Test Plan: - CI Reviewed By: pdillinger Differential Revision: D107758097 Pulled By: xingbowang fbshipit-source-id: 3256612ae1ae98b66901593371743b3de7e5bb53
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.
Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.
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.