本文介绍了Redis中数据持久化的目录配置重要性，并推荐将工作目录设置为绝对路径以避免因相对路径引起的意外覆盖问题。
# The working directory.
#
# The DB will be written inside this directory, with the filename specified
# above using the 'dbfilename' configuration directive.
#
# The Append Only File will also be created inside this directory.
#
# Note that you must specify a directory here, not a file name.
dir ./
#
# The DB will be written inside this directory, with the filename specified
# above using the 'dbfilename' configuration directive.
#
# The Append Only File will also be created inside this directory.
#
# Note that you must specify a directory here, not a file name.
dir ./
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这里默认是启动后的相对路径也就是你的redis在哪里启动，dump.rdb 文件或者appendonly.aof
文件就会产生在启动所在的目录；
这也就是有些人重启后key值消失的原因，那是因为又产生了其他ump.rdb 文件或者appendonly.aof
这里建议改成绝对路径
dir /usr/local/redis/data/
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