The Redis PERSIST command removes any existing timeout on a given key. It returns an integer reply of 1 if the timeout was removed, or 0 if the key doesn’t exist or doesn’t have an associated timeout.
Tag: commands
Redis PTTL Command Explained
In Redis, the PTTL command returns the remaining time to live of a given key, in milliseconds.
If the key doesn’t have a timeout, an integer reply of -1 is returned. If the key doesn’t exist, -2 is returned.
PTTL works the same as the TTL command, except that it returns the result in milliseconds instead of seconds.
Redis TTL Command Explained
In Redis, the TTL command returns the remaining time to live of a given key, in seconds.
If the key doesn’t have a timeout, an integer reply of -1 is returned. If the key doesn’t exist, -2 is returned.
Redis also has a PTTL command, which works the same, but returns its result in milliseconds.
Redis PEXPIRETIME Command Explained
The Redis PEXPIRETIME command returns the absolute Unix timestamp in milliseconds at which the given key will expire. This is the number of milliseconds since 00:00:00 UTC on 1 January 1970 until the expiry time of the key.
This works exactly the same as EXPIRETIME, but it returns the Unix timestamp in milliseconds instead of seconds.
The PEXPIRETIME command was introduced in Redis 7.0.0.
Redis EXPIRETIME Command Explained
The Redis EXPIRETIME command returns the absolute Unix timestamp in seconds at which the given key will expire. This is the number of seconds since 00:00:00 UTC on 1 January 1970 until the expiry time of the key.
The EXPIRETIME command was introduced in Redis 7.0.0.
Redis EXPIREAT Command Explained
The Redis EXPIREAT command sets a timeout as a Unix timestamp on a given key. It works the same as the EXPIRE command, but with an absolute Unix timestamp instead of a time interval in seconds (which EXPIRE uses).
Redis PEXPIREAT Command Explained
The Redis PEXPIREAT command sets a timeout as a Unix timestamp on a given key in milliseconds. It works the same as the EXPIREAT command, except that it sets the timeout in milliseconds instead of seconds.
It’s also similar to the PEXPIRE command, but with an absolute Unix timestamp instead of a time interval.
Redis PEXPIRE Command Explained
The Redis PEXPIRE command sets a timeout on a given key in milliseconds. After the timeout has expired, the key will be deleted.
The PEXPIRE command works exactly the same as the EXPIRE command, except that it returns the timeout in milliseconds instead of seconds.
Redis EXPIRE Command Explained
The Redis EXPIRE command sets a timeout on a given key in seconds. After the timeout has expired, the key will be deleted.
Redis also has a PEXPIRE command that works the same as EXPIRE, except that it returns the timeout in milliseconds instead of seconds.
A key with a timeout is said to be volatile in Redis terminology.
Continue readingRedis STRLEN Command Explained
In Redis, the STRLEN command returns the length of the string stored at a given key.