Shulou(Shulou.com)06/01 Report--

We all know that we can use keys pattern when looking up keys for Redis, but when there is too much key, the keys command is very inefficient, and if we use it directly online, there may even be a production accident, so we might as well use the scan command.

The SCAN command is a cursor-based cursor based iterator:

Each time the SCAN command is called, a new cursor is returned to the user, and the user needs to use this new cursor as the cursor parameter of the SCAN command in the next iteration to continue the previous iteration.

When the cursor parameter of the SCAN command is set to 0, the server starts a new iteration, and when the server returns a cursor with a value of 0 to the user, the iteration is over.

Generate key

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