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redis SETEX command

Chinese translationRecent Updates：2018-05-16 10:33:05

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 command Video explanation

redis SETEX command syntax

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 command example

# 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

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