swh:1:snp:5115096b921df712aeb2a08114fede57fb3331fb
Revision fb09ef05dcee8fa0ccaebf88ef1992858ea5a083 authored by Yanqin Jin on 21 March 2020, 02:17:54 UTC, committed by Facebook GitHub Bot on 21 March 2020, 02:30:48 UTC
Summary:
There are situations when RocksDB tries to recover, but the db is in an inconsistent state due to SST files referenced in the MANIFEST being missing. In this case, previous RocksDB will just fail the recovery and return a non-ok status.
This PR enables another possibility. During recovery, RocksDB checks possible MANIFEST files, and try to recover to the most recent state without missing table file. `VersionSet::Recover()` applies version edits incrementally and "materializes" a version only when this version does not reference any missing table file. After processing the entire MANIFEST, the version created last will be the latest version.
`DBImpl::Recover()` calls `VersionSet::Recover()`. Afterwards, WAL replay will *not* be performed.
To use this capability, set `options.best_efforts_recovery = true` when opening the db. Best-efforts recovery is currently incompatible with atomic flush.

Test plan (on devserver):
```
$make check
$COMPILE_WITH_ASAN=1 make all && make check
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6334

Reviewed By: anand1976

Differential Revision: D19778960

Pulled By: riversand963

fbshipit-source-id: c27ea80f29bc952e7d3311ecf5ee9c54393b40a8
1 parent 4fc2166
History
Tip revision: 19076c95aa2bcee55c26fcf0960cc844ad86ee9c authored by Levi Tamasi on 21 January 2021, 22:18:25 UTC
Update HISTORY.md for PR 7888 (#7890)
Tip revision: 19076c9
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.circleci
buckifier
build_tools
cache
cmake
coverage
db
db_stress_tool
docs
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examples
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hdfs
include
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memtable
monitoring
options
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table
test_util
third-party
tools
trace_replay
util
utilities
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