redis - 配置redis作为缓存

Question

我想纯粹用redis做缓存。我必须在 redis.conf 中禁用哪些选项才能确保如此。我读到默认情况下 redis 会保留数据(AOF 和 rdb 文件，也许还有更多)。即使是设置为过期的 key 也是如此。持久化设置为过期的数据是不是自相矛盾？

Answer 1

Redis 将其所有数据存储在 RAM 中，但会不时将其转储到持久性存储 (HDD/SDD)。此过程称为快照。

您可以在 your redis.conf file 中配置快照频率(参见 SNAPSHOTTING 部分):

#   save <seconds> <changes>
#
#   Will save the DB if both the given number of seconds and the given
#   number of write operations against the DB occurred.
#
#   In the example below the behaviour will be to save:
#   after 900 sec (15 min) if at least 1 key changed
#   after 300 sec (5 min) if at least 10 keys changed
#   after 60 sec if at least 10000 keys changed
#
#   Note: you can disable saving completely by commenting out all "save" lines.
#
#   It is also possible to remove all the previously configured save
#   points by adding a save directive with a single empty string argument
#   like in the following example:
#
#   save ""

save 900 1
save 300 10
save 60 10000

因此，如果您想完全禁用快照，您应该删除或注释掉 redis.conf 文件中的所有 save 指令。