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How Redis implements master-slave replication

Introducing Redis earlier, we all operate on a server, which means that reading, writing and backup operations are all performed on a Redis server. As the number of project visits increases, the operations on the Redis server also increase. More and more frequently, although Redis's reading and writing speed is very fast, it will also cause a certain delay to a certain extent. In order to solve the problem of large access volume, one method usually adopted is the master-slave architecture Master/Slave, Master Mainly for writing, Slave is mainly for reading. After the Master node is updated, it will automatically synchronize to the slave Slave node according to the configuration. Next, we will introduce how to build a master-slave architecture. ps: Here I am

May 30, 2023 am 08:01 AM

redis

Redis5 BloomFilter installation under mac and how to use it with python

Install and use the Bloom filter. Install and use the Bloom filter (BloomFilter) for Redis5. /RedisBloom/RedisBloom.git#https://github.com/RedisBloom/RedisBloom If it is slow, you can use the external network to access 3. Enter the plug-in directory: cdredisbloom/ (it was RedisBloom before renaming) 4. Execute: make5. Modify

May 30, 2023 am 08:01 AM

Pythonredisbloomfilter

How to write a python3 Redis unauthorized detection script

importsysimportgetoptimportsocketdefget_target():opts,args=getopt.getopt(sys.argv[1:],'-i:-p:-h')#print(opts)foropt_name,opt_valueinopts:ifopt_name=='-h':print('[*]Thisishelpinformation[*]n''[*]

May 29, 2023 pm 11:55 PM

Pythonredis

What are the Lua script implementation methods and application scenarios in Redis?

1. RedisLua script overview Redis’s Lua script function allows users to write custom scripts and execute them on the Redis server. Lua is a lightweight scripting language with the advantages of simplicity, efficiency, and scalability. In Redis, Lua scripts can be used for complex data processing, such as data filtering, aggregation, sorting, etc., and can also improve the performance of the Redis server. 2. Advantages of RedisLua script Compared with the traditional Redis command method, Lua script has the following advantages: (1) Reduce network delay: Lua script combines multiple Redis commands into one script, reducing the network between the client and the server Interaction. At the same time, the Redis server also provides E

May 29, 2023 pm 11:10 PM

redislua

What are the two pitfalls that Redis distributed locks must avoid?

1 The first pit: wrong lock release timing 1.1. Find the problem and analyze the problems in the following code: //Distributed lock service publicinterfaceRedisLockService{//Get the lock publicbooleangetLock(Stringkey);//Release the lock publicbooleanreleaseLock(Stringkey);}// Business service publicclassBizService{@ResourceprivateRedisLockServiceredisLockService;publicvoidbizMethod(

May 29, 2023 pm 10:52 PM

redis

Springboot integrated Redis instance analysis

Dependency package org.springframework.bootspring-boot-starter-data-redis configuration file (application.properties)#Redis database index (default is 0) spring.redis.database=0#Redis server address spring.redis.host=x.x.x.x# Redis server connection port spring.redis.port=6738#Redis server connection password (default is empty) spring.redis.password=#Connection timeout (milliseconds) sp

May 29, 2023 pm 10:27 PM

redisSpringBoot

How to use annotations to implement Redis caching function

Key and value storage system written in C language (different from MySQL's two-dimensional table storage.) rdb: periodic persistence aof: appending the default rdb in the form of log is enabled, and at the same time enable the use of aof data types: string, list, set, zset, hash, bitMaps byte form storage, geospatial longitude and latitude type... Single thread: Use multiple io multiplexing to achieve high concurrent use: Add dependency org.springframework.bootspring-boot-starter-data-redisorg.apache. commonscommons-pool

May 29, 2023 pm 10:04 PM

redis

Example analysis of Redis backup, disaster recovery and high availability practice

1. A brief introduction to Redis. Redis is a high-performance key-value non-relational database. Due to its high-performance characteristics and support for high availability, persistence, multiple data structures, clusters, etc., it stands out and becomes a commonly used non-relational database. Relational Database. In addition, Redis has many usage scenarios. Session Cache (SessionCache) Redis cache session has a very good advantage, because Redis provides persistence, and can provide good long session support in application scenarios that need to maintain sessions for a long time, such as shopping cart scenarios. Provide users with a great shopping experience. Full page caching in WordPress, Pantheon provides a nice plugin wp

May 29, 2023 pm 10:03 PM

redis

Example analysis of Redis caching problem

1. Application of Redis cache In our actual business scenarios, Redis is generally used in conjunction with other databases to reduce the pressure on the back-end database, such as in conjunction with the relational database MySQL. Redis will cache frequently queried data in MySQL, such as hotspot data, so that when users come to access, they do not need to query in MySQL, but directly obtain the cached data in Redis, thus reducing the back-end cost. Database read pressure. If the data queried by the user is not available in Redis, the user's query request will be transferred to the MySQL database. When MySQL returns the data to the client, the data will be cached in Redis so that the user can read it again.

May 29, 2023 pm 09:50 PM

redis

How to use Redis's HyperLogLog algorithm

Today is Friday, you are happily fishing, and the product manager sends you a requirements document via email. The demand is probably: the company needs to count the website's daily visitor IPs, and this statistics is a long-term behavior, ranging from a few months to a few years. After reading the requirements, you will think it is so easy. You can easily implement this function using the Redis collection type: generate a collection type key every day, use SADD to store the daily visitor IPs, and use the SCARD command to easily get the number of daily visitor IPs. You quickly type out the code and pass the tests, and the feature is online. After going online and running for a period of time, you will find that the server where Redis is located starts to alarm. The reason is that the memory usage of some keys is too large. You take a look and find that these keys are

May 29, 2023 pm 09:49 PM

redishyperloglog

How to install and configure Redis in Centos7

Centos7 installs Redis0, updates the file yumupdate-y1, downloads redis2, and puts the compressed package into Linux. I put it in export/intstall and decompressed cdexport/installtar-zxvfredis-6.2.1.tar.gz3, installation environment c++//install c ++yuminstallgcc-c++-y//View version gcc-v4, configure basic file cdredis-6.2.1make5, install service This is the default installation makeinstall This is a custom installation makeinstallPREFIX=/u

May 29, 2023 pm 08:58 PM

redisCentOS

How to use and encapsulate Redis in ThinkPHP5 framework

Redis is a commonly used non-relational database. It is mainly used for data caching. The data is saved in the form of key-value, and the key values map to each other. Its data storage is different from MySQL. Its data is stored in memory, so the data is read It is relatively fast and is very good for high concurrency. ThinkPhP5.0 comes with a Redis extension. Download php_redis.dll before using it. Choose the corresponding version according to your own windows operating system. My system is 64-bit and I installed VC2012, so I downloaded php_redis-2.2.7-5.6-ts-vc11-x64.zip. After downloading the compressed package, put the php_red inside

May 29, 2023 pm 08:40 PM

redisthinkphp

What is the method of designing the Pika architecture of the Redis storage system?

Pika is an efficient, stable, simple and reliable open source NoSQL database product jointly developed by the 360 infrastructure team and the DBA team. It is fully compatible with the Redis protocol and supports 5 data structures (string, hash, list, set, zset). The data is persisted to RocksDB. Compared with the storage method of Redis memory, it can greatly reduce the occupation of server resources and enhance the data security. reliability. It can be deployed in two modes: stand-alone and cluster. The Pika project was launched in 2015 and was subsequently open sourced on Github. It currently has 3,700 stars and 35 contributors. The community has a large number of online businesses using Pika. Compare Redis storage

May 29, 2023 pm 08:07 PM

redisPika

How to connect redis with SpringBoot

First open the redis server: then add the configuration file in springboot: #Redis database index (default is 0) spring.redis.database=0 #Redis server address spring.redis.host=localhost #Redis server connection port spring.redis.port =6379#Redis server connection password (default is empty) spring.redis.password=#Maximum number of connections in the connection pool (use negative values to indicate no limit) spring.redis.pool.max-active=8#Maximum blocking wait for the connection pool

May 29, 2023 pm 07:34 PM

redisSpringBoot