Shell script to delete redis keys matching a pattern

A quick way to delete redis keys from the command line would be:

        redis-cli DEL "del_key"

If you wish to delete all keys matching a certain pattern,
        redis-cli KEYS "*del_pattern*" | xargs redis-cli DEL

A more easy shell script for it would be:

	#!/bin/sh
	[ "$#" -eq 1 ] || { echo "ERROR:1 argument required, $# provided"; exit 1; }
	redis-cli KEYS "*$1*" | xargs redis-cli DEL

view raw redis-delete.sh hosted with ❤ by GitHub

Save it as redis-delete.sh and you can just run it as:
        ./redis-delete.sh del_pattern

UPDATE:
The above code using KEYS does not scale well and so for a more performance efficient code, we can use SCAN which is a cursor-based iterator.

	#!/bin/sh
	[ "$#" -eq 1 ] || { echo "ERROR:1 argument required, $# provided"; exit 1; }
	cursor=-1
	keys=""
	while [ $cursor -ne 0]; do
	if [ $cursor -eq -1 ] then
	cursor=0
	fi
	reply=`redis-cli SCAN $cursor MATCH $1`
	cursor=`expr "$reply" : '\([0-9]*[0-9 ]\)'`
	keys=${reply#[0-9]*[[:space:]]}
	redis-cli DEL $keys
	done

view raw redis-delete-scan.sh hosted with ❤ by GitHub