redis transaction

, end transactions, perform transactional operations after receiving the EXEC command, and if a command fails, other commands can continue to execute, and during a transaction execution, Requests submitted by other clients are not inserted into the list of commands executed by the transaction.Three stages of a business experience Start Transaction (command: Multi)Command executionEnd

Tags: nis ted field full name Commit tab get MIT Excerpt from: http://www.cnblogs.com/fjdingsd/p/5273008.html This article tells the four characteristics (ACID) of transactions in the database, and will explain the isolation level of the transaction in detail. If a database claims to support transactional operations, then the database must have the following four features:⑴ atomicity (atomicity)　Atomicity means that all the operations contained in a

[TOC] Redis Note-taking (ii): Java API use with Redis distributed cluster environment using Redis Java API (i): Standalone version of Redis API usageThe Redis Java API operates through Jedis, so the first Jedis third-party libraries are needed, because the MAVEN projec

Once again misled by those tutorials on the web decided to write one yourself. I've been misled by the strange tutorials a few times, and I've been studying other things before. The egg hurts.Installing RedisYou can use the Apt-get command directlysudo apt-get install Redis-serverThe installation will ask you a thing, enter Y on the line.The Redis service will start automatically after installation, and you

The following is a description from the great God, the personal feel very clear, the collection.Why cluster?In general, in order to improve the responsiveness of the website, the hotspot data is always kept in memory instead of being read directly from the backend database. Redis is a good cache tool. Large web site applications, the amount of hot data is often huge, dozens of g hundreds of G is very normal, in this case, how to properly structure

)The Snapshot method is performed at intervals. If redis sends an unexpected crash, all modifications made after the last snapshot will be lost. Aof method will append each received write command to the file through the write function (default is appendonly. aof), when redis restarts, it re-executes the write command stored in the file to recreate the entire database content in the memory. Related configura

Original: http://www.cnblogs.com/fjdingsd/p/5273008.htmlThis article tells the four characteristics (ACID) of transactions in the database, and will explain the isolation level of the transaction in detail.If a database claims to support transactional operations, then the database must have the following four features:⑴ atomicity (atomicity)Atomicity means that all the operations contained in a transaction

I. Four basic characteristics of database transactionsA transaction is a series of operations performed as a logical unit, and a logical work cell must have four properties , called ACID(atomicity, consistency, isolation, and persistence) properties, in order to be a transaction.　1. atomicity (atomicity): The operations contained in a transaction are treated as

. Data consistency issuesMemcached provides a CAS command that guarantees consistency of the same data for multiple concurrent access operations. Redis does not provide CAS commands, and this is not guaranteed, but Redis provides the functionality of a transaction that guarantees the atomicity of a sequence of commands and is not interrupted by any action.4. Stor

score3 Key3 ... Adds a key to an ordered collection and defines its score, which the collection sorts with scoreZrange Sorted_set a B [withscores] displays all when the value B in the sequence table is 1 from a to B, [shows the score of each value]Zrank/zrevrank Sorted_set Key positive/reverse shows the position of key in an ordered setZrem sorted_set key removes key from an ordered collectionZcard Sorted_set [M n] Calculates the total number of [score between M and N] in an ordered set Hash (h

Because the version compatibility between Tomcat and Tomcat-redis-session-manager is poor, this article uses the measured and feasible jar and provides the next download; environment is Tomcat7-java7,jar package please download the attachmentFirst step: Jar Package PreparationFirst put the jar package into the Lib directory under the Tomcat root directory (note that it is placed in Tomcat's Lib directory, not the application's lib directory);Step Two:

, and the state change must also be undone. This may involve invoking the service again and performing another reversal of the effect of the action. Solution SolutionsImplement a compensating transaction. The steps in a compensating transaction must undo the effects of the steps in the original operation. A compensating transaction might not being able to simply

Python redis-cli.py Python3 redis-cli Command-line administration toolDue to the recent test of redis unauthorized access vulnerability, found that the machine does not have Redis installed, can not run redis-cli, so he wrote a simple re