redis持久化文件在配置文件中可查看路径。
例如：
# The filename wherre to dump the DB
dbfilename dump.rdb //文件名
# 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 filename.
dir ./ //文件存放路径
