How to get the number of keys matching a particular pattern

[Santos Das]

Hi,

I am using Redis cluster.  Is there a wayI can get the key counts for a matching a pattern?

For example, I want to find out how many keys start with XYZ?

ANy info would be helpful

thanks, santos

[Jan-Erik Rediger]

That's general not a thing Redis is good at.
There are two commands that could do it per node:
KEYS (http://redis.io/commands/keys) - Don't ever use that!
SCAN (https://redis.io/commands/scan) - Still requires you to do a full scan through the keyspace

If this is a thing you need to do regurarly it's time to rethink your
data structure.

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