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ircd::db::database: Hide dangerous best_efforts_recovery behind all-caps options.

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This commit is contained in:
Jason Volk 2023-02-19 13:33:47 -08:00
parent 06583f7bfb
commit 6e33d52bda
1 changed files with 12 additions and 12 deletions

24
ircd/db_database.cc
View file

@ -981,29 +981,29 @@ try
// When corrupted after crash, the DB is rolled back before the first
// corruption and erases everything after it, giving a consistent
// state up at that point, though losing some recent data.
if(string_view(open_recover) == "point")
if(iequals(string_view(open_recover), "point"))
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kPointInTimeRecovery;
// When corrupted after crash and PointInTimeRecovery does not work,
// this will drop more data, but consistently. RocksDB sez the WAL is not
// used at all in this mode.
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR >= 10)
if(string_view(open_recover) == "recover")
opts->best_efforts_recovery = true;
#endif
// Skipping corrupted records will create gaps in the DB timeline where the
// application (like a matrix timeline) cannot tolerate the unexpected gap.
if(string_view(open_recover) == "skip" || string_view(open_recover) == "recover")
if(iequals(string_view(open_recover), "skip"))
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kSkipAnyCorruptedRecords;
// Tolerating corrupted records is very last-ditch for getting the database to
// open in a catastrophe. We have no use for this option but should use it for
//TODO: emergency salvage-mode.
if(string_view(open_recover) == "tolerate")
if(iequals(string_view(open_recover), "tolerate"))
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kTolerateCorruptedTailRecords;
// When the mode is all caps best efforts recovery is enabled. This is
// highly experimental and not well understood. Possibly in combination
// with an ill-selected above mode, the entire database may be destroyed.
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR >= 10)
if(all_of<std::isupper>(string_view(open_recover)))
opts->best_efforts_recovery = true;
#endif
// Setup env
opts->env = env.get();