AOF file.
Useredis-check-aofCommand to repair the original AOF file:$ redis-check-aof --fix
Availablediff -uCommand to see the differences between the two files.
Use repaired files to restart the Redis service.
Switch from RDB to AOF
Here we only refer to Redis> = 2.2:
Back up the latestdump.rdbAnd put the backup file in a safe place.
Run the following two
the similarities and differences between the backup file and the repaired file (optional );
Use the repaired AOF file to restart Redis.
How does one transition from RDB to AOF persistence?
Redis> = 2.2
Create a backup of the latest RDB file;
Save the backup to a secure location;
Run the following command;
$ Redis-c
AOF without restarting:
CONFIG SET appendonly yesCONFIG SET save ""
Make sure that the number of database keys does not change after the command is executed.
Make sure that the write command is correctly appended to the end of the AOF file.The AOF function is enabled for the First Command executed in step 3: Redis will block until the initial AOF file creation is complete, and
Redis persistence-RDB and Redis persistence-RDBRedis provides a RDB persistence mechanism, that is, to write data set snapshots in the memory to the disk at a specified interval.Advantages of RDB:1. In this way, there is only one file to back up the
Redis Summary (4) Redis persistence, redis Summary
I have summarized the installation and use of Redis. Today I will talk about Redis persistence.
Similar to memcached,
Advanced applications of Redis-transaction processing, persistence, message publishing and subscription, virtual memory usage, and redis Transaction Processing
Iii. Transaction Processing
Redis transaction processing is relatively simple. You can only ensure that the commands in the transaction initiated by the client
executed write commands, the parent process accumulates them into a memory cache and appends these changes to the end of the existing aof file: in this way, the existing aof files are still safe even when the rewrite is interrupted.
When a child process completes rewriting, it sends a signal to the parent process. After receiving the signal, the parent process appends all data in the memory cache to the end of the new aof file.
Done! Now redis repl
off the RDB feature. This step is optional, and you can use both the RDB and AOF persistence features if you want. Don't forget to open the AOF feature in redis.conf! Otherwise, after the server restarts, the configuration previously set by Config set will be forgotten, and the program will start the server as it was originally configured. Interaction between the RDB and the AOF:In
Tags: change password change password information exit size. exe OCA instance modify portSelect Switch LibraryDbsize the number of data bars in the current libraryFlushdb | Flushall clears the data, one clears the current library, one clears the current instanceSave | Bgsave saved to disk, Bgsave is stored in the background, does not block the current operationSave is completed by the main process, bgsave by another processConfig Get | Config Set |
1. For Redis persistence, check the official documentation:650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M02/95/4D/wKiom1kT6hvhBtUdAACZ_3XtiFg032.png "title=" 01. PNG "alt=" Wkiom1kt6hvhbtudaacz_3xtifg032.png "/>Note: Redis offers a number of different ways to persist options:An RDB (that is, Redis database)
Label: Unable to configure file BSP comparison to represent Col image save child processFirst, the foregoingPersistence concept: Store data from lost and volatile memory on devices that can be permanently stored. Redis Persistence modeRDB (Redis DB) hdfs:fsimageAOF (appendonlyfile) Hdfs:edit logs off by defaultSecond, the RDB modeBy default,
Redis source code parsing (5): redis persistence, redis source code parsing
Redis is often called a memory database because it stores all data in the memory. To enable the data to continue to be used after the server restarts, Redis
Redis supports two persistence policies: snapshot and commandlog. The former is implemented by periodically writing the current Memory Data snapshot into the RDB file; the latter is implemented by recording the write operations received by the Redis process in the log. When Redis restarts next time, the commandlog is p
Redis is an in-memory database that supports persistence, which means that Redis often needs to synchronize in-memory data to disk to ensure persistence. Redis supports four persistence methods, one is snapshotting (snapshot) is t
is associated with the "AOF rewrite".The AOF feature determines that it is relatively safe, and if you expect less data loss, you can use AOF mode. If the AoF file is being written and suddenly the server fails, it is possible that the last record of the file is incomplete, and you can detect and correct the incomplete records by hand or by program, so that the recovery through the AoF file can be normal; If you have aof in your Redis
Redis is a memory database in which all of its data is stored in memory and then periodically asynchronously saved to disk (this is known as "semi-persistent mode"), and each data change can be written to a append only File (AOF) ( This is called "Full persistence mode").Redis provides two different levels of persistence
Redis Research (11)-data persistence, redis Research DataRedis's strong performance is largely due to the fact that it stores all the data in the memory. In order to ensure that Redis will not lose data after the restart, data needs to be synchronized from the memory to the hard disk in some form. This process is persi
persistence after the end of execution aof rewrite
2. In Redis profile redis.conf, the user sets the Auto-aof-rewrite-percentage and Auto-aof-rewrite-min-size parameters, and the current aof file size Server.aof_ Current_size greater than auto-aof-rewrite-min-size (Server.aof_rewrite_min_size), AoF Rewrite is automatically triggered when the growth rate of aof file size is greater than auto-aof-rewrite-per
to the end of the new AOF file.Create a backup for the latest Dump.rdb file.Put the backup in a safe place.Execute the following two commands:redis-cli> CONFIG SET appendonly Yesredis-cli> CONFIG SET Save ""Ensure that the number of keys for the database has not changed since the command was executed.Make sure that the Write command is appended to the end of the AOF file correctly.The first command execute
current free physical memory of the system plus swap to determine whether to release.
Redis Persistence Practice and disaster recovery simulationResources:Redis Persistence http://redis.io/topics/persistenceGoogle Groups https://groups.google.com/forum/?fromgroups=#!forum/redis-dbFirst, the discussion and underst
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