redis SETEX command
Translation results：
set
英[set] 美[sɛt]
vt. Set; place, arrange; put in a certain situation; place tableware
vi. Setting off; setting off; condensation
n.Gathering; a set; a set; a TV set
adj. Fixed; located in...; stubborn; arranged The
third person singular: sets plural: sets present participle: setting past tense: set past participle: set
redis SETEX commandsyntax
Function:Associate the value value to key and set the key's survival time to seconds (in seconds). If key already exists, the SETEX command will overwrite the old value.
Syntax: SETEX key seconds value
Description: SETEX is an atomic operation, with two associated values and set survival time The action will be completed at the same time. This command is very useful when Redis is used as a cache.
Available versions: >= 2.0.0
Time complexity: O(1)
Return: Return OK when setting is successful. When the seconds parameter is illegal, an error is returned.
redis SETEX commandexample
# 在 key 不存在时进行 SETEX redis> SETEX cache_user_id 60 10086 OK redis> GET cache_user_id # 值 "10086" redis> TTL cache_user_id # 剩余生存时间 (integer) 49 # key 已经存在时，SETEX 覆盖旧值 redis> SET cd "timeless" OK redis> SETEX cd 3000 "goodbye my love" OK redis> GET cd "goodbye my love" redis> TTL cd (integer) 2997