How does redis delete keys in batches through the command line?

The available methods are:

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1. Use cli

FLUSHDB clears a database, FLUSHALL clears the entire redis data.

2. Use shell

redis-cli keys  "*" | while read LINE ; do TTL=`redis-cli ttl $LINE`; if [ $TTL -eq -1 ]; then echo "Del $LINE"; RES=`redis-cli del $LINE`; fi; done;

Delete those that expire after 3600 seconds

redis-cli keys  "*" | while read LINE ; do TTL=`redis-cli ttl $LINE`; if [ $TTL -ge  3600 ]; then echo "Del $LINE"; RES=`redis-cli del $LINE`; fi; done;

Delete those with certain prefixes

redis-cli KEYS "126.com*" | xargs redis-cli DEL

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