redis學習8---持久化相關測試AOF方式

1、shutdown服務或者殺掉進程測試數據是否丟失

關閉RDB持久化，啟動AOF持久化，重啟redis服務。

設置值

127.0.0.1:6379> mset k1 v1 k2 v2

OK

127.0.0.1:6379> keys *

1) "k2"

2) "k1"

127.0.0.1:6379> get k1?

"v1"

127.0.0.1:6379> get k2

"v2"

shutdown服務

127.0.0.1:6379> shutdown

啟動redis服務

查看數據還在

redis-cli -a Redis2019!

Warning: Using a password with '-a' option on the command line interface may not be safe.

127.0.0.1:6379> keys *

1) "k2"

2) "k1"

殺掉redis進程，啟動redis服務

查看值還在

redis-cli -a Redis2019!

Warning: Using a password with '-a' option on the command line interface may not be safe.

127.0.0.1:6379> keys *

1) "k2"

2) "k1"

2、測試服務異常導致appendonly.aof 文件亂碼

AOF持久化是把操作都寫進了文件appendonly.aof?

查看文件

cat appendonly.aof?

*2

$6

SELECT

$1

0

*5

$4

mset

$2

k1

$2

v1

$2

k2

$2

v2

編輯文件，填寫內容代替文件錯亂

vi appendonly.aof?

sfsbdd

1213fns

*2

$6

SELECT

$1

0

*5

$4

mset

$2

k1

$2

v1

$2

k2

$2

v2

dshfs

sdfksh5&

khdfjsj%$$

oguduog7&*

重啟redis服務，訪問redis發現失敗

redis-cli -a Redis2019!

Warning: Using a password with '-a' option on the command line interface may not be safe.

Could not connect to Redis at 127.0.0.1:6379: Connection refused

Could not connect to Redis at 127.0.0.1:6379: Connection refused

使用fix命令修復文件

[root@master1 data]# redis-check-aof --fix appendonly.aof?

0x? ? ? ? ? ? ? 45: Expected prefix '*', got: 'd'

AOF analyzed: size=114, ok_up_to=69, diff=45

This will shrink the AOF from 114 bytes, with 45 bytes, to 69 bytes

Continue? [y/N]: y

Successfully truncated AOF

查看文件發現已經修復

cat appendonly.aof?

*2

$6

SELECT

$1

0

*5

$4

mset

$2

k1

$2

v1

$2

k2

$2

v2

啟動redis服務，訪問redis查看數據沒有問題

redis-cli -a Redis2019!

Warning: Using a password with '-a' option on the command line interface may not be safe.

127.0.0.1:6379> keys *

1) "k1"

2) "k2"

127.0.0.1:6379> del k1?

(integer) 1

127.0.0.1:6379> del k2

(integer) 1

127.0.0.1:6379> mset k5 v5 k6 v6

OK

127.0.0.1:6379> keys *

1) "k5"

2) "k6"

編輯redis.conf，打開RDB持久化

重啟redis服務，訪問redis，發現數據還是只有AOF持久化的數據，并沒有之前RDB持久化的數據，正好證明了同時打開兩種持久化配置的情況下會首先使用AOF持久化的數據。

redis-cli -a Redis2019!?

Warning: Using a password with '-a' option on the command line interface may not be safe.

127.0.0.1:6379> keys *

1) "k6"

2) "k5"

3、刪除所有數據，利用AOF的特點進行修復

刪除數據，停止服務

127.0.0.1:6379> flushall

OK

127.0.0.1:6379> shutdown

編輯文件

vi data/appendonly.aof?

*2

$6

SELECT

$1

0

*5

$4

mset

$2

k1

$2

v1

$2

k2

$2

v2

*2

$6

SELECT

......

SELECT

$1

0

*1

$8

flushall

刪除最后一行 flushall

啟動redis服務

發現數據恢復

redis-cli -a Redis2019!?

Warning: Using a password with '-a' option on the command line interface may not be safe.

127.0.0.1:6379> keys *

1) "k6"

2) "k5"

參考：

https://blog.csdn.net/qq_33101675/article/details/80631992