best way for persistence in redis

Redis is a persistent memory database, which means that Redis often synchronizes data in memory to disk to ensure persistence. Redis supports four kinds of persistence methods, one is snapshotting (snapshot) is the default mode, the other is Append-only file (abbreviated AOF

. Append-only file (aof), which stores read/write operations in files. Because the snapshot method is performed once at a certain interval, if Redis is accidentally down, all modifications after the last snapshot will be lost. Aof is more persistent than snapshot, because when aof is used, redis will store every write command received in the file through the write function. When

The installation and use of Redis has been summarized earlier today to talk about the persistence of Redis.　　Redis, like Memcached, is a memory database, but Redis supports data persistence, which means that

serverCron function every MS by default to check whether the save configuration conditions are met. bgsave is performed if the conditions are met. In this way, if the conditions are within ms, I have already met the bgsave condition, so when I actually execute bgsave, I will wait until the serverCron is executed. No persistence occurs: redis has two dirty par

following sections detail the two persistence functions and describe their similarities and differences.Advantages of RDB RDB is a compact file that stores redis data sets at a certain point in time. This type of file is very suitable for backup: for example, you can back up the RDB file every hour within the last 24 hours, and back up an RDB file every day of each month. In this

I. Introduction of RedisSecond, Redis installationThree, the Redis configuration file detailedFour, Redis persistence detailed1.redis IntroductionRedis is an open-source (BSD-licensed), in-memory data structure storage system that can be used as a database, cache, and messag

the configuration of Redis database memory optimization parameters, the pros and cons of each persistence method, and the principle and configuration of master-slave replicationfirst, commonly used memory optimization methods and parametersThe performance of Redis is completely dependent on memory, so we need to know how to control and save memory.First, the most

Label:Aof,rdb is a mechanism for two types of redis persistence. For the recovery of Redis after crash. The features of the RDB are as follows: Code: Fork a process, traverse hash table, and use copy on write to save the entire db dump.Save, shutdown, slave command will trigger this operation.Particle size ratio is large, if save, shutdown, slave b

allocate a number of numeric objects from the 1~n in a pool, if the stored data is exactly the value of the data in the range, then directly from the pool to remove the object, and by reference to count the way to share, This allows the system to store a large number of values, but also to a certain extent save memory and improve performance, this parameter value n settings need to modify the source code in a row of macro definition redis_shared_inte

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

before is lost.2). Since the RDB assists with data persistence through the fork process, it can cause the entire server to stop serving hundreds of milliseconds, or even 1 seconds, if the data set is large.5.3. Advantages and disadvantages of AOF mechanism: Advantages1). This mechanism can result in higher data security, i.e. data persistence. There are 3 synchronization policies available in

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