redis persistence

I. Introductory OVERVIEW 1. What is it? redis:remote DIctionary Server (remote dictionary server) is completely open source free, written in C, comply with BSD protocol, is a high-performance (key/value) distributed memory Database , A NoSQL database that runs on memory and supports persistence is one of the most popular NoSQL databases and is also known as a data structure server. Redis and other Key-value

-enhanced version of the memcached.The main drawback of Redis is that database capacity is limited by physical memory and cannot be used as a high-performance read-write for massive data, so Redis is the most suitable scenario for high-performance operations and operations with smaller data volumes .data types supported by RedisRedis is differentiated by Key-value's single-valued different types, and the fo

200 Redis instances on a server, and it crashes. The only way to do this is to make different types of data belong to different applications and separate from each other.So, is there a way for Redis to keep different application data separate from each other and stored on the same instance? is equivalent to the MySQL database, different application data is stored under different databases.Under

is the current time in UNIX timestamp format. The second string is the number of microseconds that have elapsed in the current second redis->time ();//dbsize-– returns the number of keys for the current database Redis->dbsize ();//bgrewriteaof-- Use AOF for database Persistence redis->bgrewriteaof ();//save--save data

The Redis is an open source, support network, memory based, key-value pair storage database. The main difference from other non relational databases is that the types of values in Redis are not limited to strings (Strings), but also the following abstract data types: (list) Lists, (set) Sets, (ordered set) Sorted Sets, (hash) hashes. Redis through the RDB, aof t

(do not delete) basically consistent. Redis persistence principle and configuration details The powerful function of redis is largely because it stores all data in the memory. To ensure that data is not lost after redis is restarted, the data needs to be persisted to the hard disk in some form from the memory.

for Redis (Servicestack.redis DLL); (2) write the following code: 1 PublicStatic Iredisclientsmanager Redisclientmanager=New Pooledredisclientmanager (New string[] 2 { 3"127.0.0.1:6379","127.0.0.1:6380" 4 }); 5 6 PublicStatic Iredisclient Redisclient=redisclientmanager.getclient ();7 8static void Main (string[]args)9 { Ten if(redisclient!= NULL) One { ARedisclient.SetString>("Us

In-depth introduction to the Redis-redis underlying data structure (below), simple introduction to redis-redisOverview: 　　　　Learning to use Redis doesn't actually need to study the implementation of its underlying data. We only need to know which common data types he has, and then use them skillfully, so that we can ha

is not doing well in some aspects: Operations involving multiple keys are usually not supported. for instance you can't perform the intersection between two sets if they are stored in keys that are mapped to different redis instances (actually there are ways to do this, but not directly ).Operations involving multiple keys are not supported. For example, you cannot perform operations on the cross set of two sets mapped to two

reference counting way to share, so that the system stores a large number of values, but also to some extent save memory and improve performance, this parameter value n settings need to modify the source code a line of macro definition redis_shared_integers, the value is 10000 by default, Can be modified according to their own needs, modified and re-compiled on it.Persistence mechanism:Timed snapshot mode (snapshot):This persistence is actually a tim

following results can be obtained from the debug run: (3) View the storage situation through the command line client of master and slave: In ①master:get UserName In ②slave:get UserName Third, look back to the Redis master-slave replication Model 3.1 Redis two ways to store Redis is a