Redis backup recovery

redis server, with only one node. I am inserting a piece of data,

. set 1 1
. get 1
. save
dumps.rdb
Desktop
. del 1
. get 1 nil
.   redis
7.   dumps.rdb/var/lib/redis/
8. redis
9. get 1
nil 

data backup is not restored. I would like to ask what is the reason

Feb.28,2021

have you saved the disk?


found the problem, mainly pay attention to several points
1. Close redis
2 when copying files. Note that the permissions of the file and the group to which it belongs are redis, permissions. It should be 660

.
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bdc8a8-31322.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bdc8a8-31322.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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