Redis Watch command
Redis Watch command is used to monitor one (or more) key, if this (or these) key change was the implementation of other commands before the transaction, then the transaction will be interrupted
grammar
redis Watch basic command syntax is as follows:
redis 127.0.0.1:6379> Watch
Available versions
> = 2.2.0
return value
Always returns OK.
Examples
redis> WATCH lock lock_times OK