CODEWITHSUNDEEP
c#redisstackexchange.redis
Robert
Robert

Reputation: 2691

Redis Stack Exchange how to delete or get keys by pattern

I installed Stack Exchange redis client in C#. I can only delete one key or array of keys but I don't know how to delete keys with prefix. Or another solution can be first get all keys by pattern and then delete them. But I don't know how to get keys by pattern too.

Upvotes: 23

Views: 42178

Answers (2)

Marc Gravell
Marc Gravell

Reputation: 1062755

Deletion is separate by key, unless you are flushing the entire database.

Key scanning is readily available on the IServer API, and is discussed much more here: https://stackexchange.github.io/StackExchange.Redis/KeysScan

However, it should still usually be avoided in production - that isn't the intended use-case for redis.

Upvotes: 15

Kerem Demirer
Kerem Demirer

Reputation: 1226

You can do as the following to batch delete items from redis cache. (StackExchange.Redis.StrongName v1.0.488)

foreach (var ep in _muxer.GetEndPoints())
{
    var server = _muxer.GetServer(ep);
    var keys = server.Keys(database: _redisDatabase, pattern: pattern + "*").ToArray();
    _db.KeyDeleteAsync(keys);
}

_muxer is instance of ConnectionMultiplexer

It does not delete by pattern as you asked but much faster than deleting each key separately.

Upvotes: 36

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