Redis
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set

SET

SET key value [EX seconds] [PX milliseconds] [NX|XX]

Available since 1.0.0.

Time complexity: O(1)

Set key to hold the string value. If key already holds a value, it is overwritten, regardless of its type. Any previous time to live associated with the key is discarded on successful SET operation.

Options

Starting with Redis 2.6.12 SET supports a set of options that modify its behavior:

  • EX seconds -- Set the specified expire time, in seconds.
  • PX milliseconds -- Set the specified expire time, in milliseconds.
  • NX -- Only set the key if it does not already exist.
  • XX -- Only set the key if it already exist.

Note: Since the SET command opt