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memcached基础15
2022-06-27 01:35:00 【franket】
cas
cas即checked and set的意思,只有当最后一个参数和gets所获取的参数匹配时才能存储,否则返回“EXISTS”
gets a
VALUE a 0 8 11
lkjhgfds
END
cas a 0 0 8 12
asdfghjk
EXISTS
gets a
VALUE a 0 8 11
lkjhgfds
END
cas a 0 0 8 11
asdfdsas
STORED
gets a
VALUE a 0 8 12
asdfdsas
END
append
在现有的缓存数据后添加缓存数据,如现有缓存的key不存在服务器响应为ERROR
get a
VALUE a 0 8
asdfdsas
END
append a 0 0 8
lkjhhjkl
STORED
get a
VALUE a 0 16
asdfdsaslkjhhjkl
END
append uu
ERROR
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