Shulou(Shulou.com)06/01 Report--

1. Shutdown service or kill the process to test whether data is lost

Turn off RDB persistence, start AOF persistence, and restart the redis service.

Set valu

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 service

127.0.0.1 purl 6379 > shutdown

Start the redis service

Check that the data is still there.

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"

Kill the redis process and start the redis service

Check that the value is still there.

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. Abnormal test service leads to garbled appendonly.aof files.

AOF persistence is to write all operations into the file appendonly.aof.

View Fil

Cat appendonly.aof

2

$6

SELECT

, 1

0

* 5

$4

Mset

$2

K1

$2

V1

$2

K2

$2

V2

Edit the document and fill in the contents instead of messy documents.

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&*

Restart the redis service, access to redis discovery failed

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

Use the fix command to repair files

[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

Check the file and find that it has been repaired.

Cat appendonly.aof

2

$6

SELECT

, 1

0

* 5

$4

Mset

$2

K1

$2

V1

$2

K2

$2

V2

It is no problem to start redis service and access redis to view data

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"

Edit redis.conf and turn on RDB persistence

Restart the redis service, access redis, and find that the data is only persisted by AOF, and there is no previous data persisted by RDB, which proves that AOF persistent data will be used first when two persistence configurations are enabled at the same time.

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. Delete all data and make use of the characteristics of AOF to repair.

Delete data, stop service

127.0.0.1 purl 6379 > flushall

OK

127.0.0.1 purl 6379 > shutdown

Edit a file

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

Delete the last line of flushall

Start the redis service

Discovery data recovery

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"

Reference:

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

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