redis transaction

Transaction processing of Redis As we all know, business refers to "a complete action, or all the implementation, or nothing to do." Before talking about Redis transaction processing, we must first introduce four Redis instructions, namely multi, EXEC, discard, WATCH. These

1. What is a transaction:A transaction is a rigorous set of operations in a program, and all operations must be completed successfully, or changes made in each operation will be undone, which is the atomicity of the transaction (either success or failure).2. Transaction characteristics:Transaction characteristics are divided into four: atomicity (atomicity), cons

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

A: Introduction Redis transactions are usually done using commands such as Multi,exec,watch, and the Redis implementation mechanism is very much different from common relational databases, such as Redis transactions that do not support rollback, and transaction execution that blocks request execution by other clients.

serialization of Stringredistemplate uses Stringredisserializer. The results after using Stringredistemplate to operate Redis are read-friendly.In addition to the hash type, there is also a corresponding HashKey serialization (which corresponds to the field name of the hash type).Use of 6.3RedisTemplate Test Redistemplate, handle the readability of key independently (String serial number) @Ignore @testpublicvoidtest4 () {stringkey = "Spring"; Listope

Redis is an open source database that uses memory data structures for storage and can be used as a database, cache, and message broker. Redis supports rich data structures, such as: string ( Strings ), hash (), Hashs list ( Lists ), collection (), Sets ordered collection ( SortedSets ). Redis has built-in replication, Lua scripting, transactions, and different le

The previous period has been a more in-depth study of spring's transactional configuration, which, although configured for spring's transaction configuration, has not been clearly understood. Through this learning to find spring's transaction configuration as long as the idea is clear, or better grasp. Summarized as follows: In the spring configuration file, there are always three components in the

The problem of repeated data insertions before the line, by troubleshooting the problem and the default isolation level of MySQL-repeatable read (can be reread) , repeatable read ensures that multiple instances of the same transaction will see the same data row when concurrently reading the data. Now through the experiment, the problem is analyzed.1. Turn on transaction A at Terminal A, and check.TRANSACTIO

A: This tutorial uses the environment: ubuntu12.x, jdk1.7, Intellij idea, spring3.2.8, Redis server 3.0,jedis client 2.7.3 Spring-data-redis 1.6.0 II: Redis Server Installation Tutorial Here is an unknown solution Three: Examples of Redis cache features are: Spring Configuration: The cache uses the test class: pub

parameter, or keyreturn valuelong number of keys deleted. returns the number of key-values to be deleted. Examples $ redis-> set ('key1', 'val1'); $ redis-> set ('key2', 'val2 '); $ redis-> set ('key3', 'val3'); $ redis-> set ('key4', 'val4'); $ redis-> Delete ('key1 ', 'ke

In the previous article, the bank transfer business did not use transactions, there will be problems, so this article on the previous article to modify the problem.The transaction relies on AOP, and AOP needs to define the facets, which consist of advice (notification) and PointCut (tangent)!Project Structure diagram:This case and the case of the previous article is the same, we are only modifying the Applicationcontext.xml file, the other code will n

cluster vs Single Machine Cluster restrictions: Key batch operation support is limited: for example, mget, mset must be supported in an slotkey transaction and Lua limited: the operated key must be the smallest granularity of the Data Partition in one node key: bigkey partitions are not supported and multiple databases are not supported. In cluster mode, only one db0 replication supports only one layer. The tree replication structure

Redis support for transactions is now relatively straightforward. Redis can only guarantee that commands in one client-initiated transaction can be executed consecutively, but not in the middle of the other client's commands. Since Redis is a single-threaded process for all client requests, it is easy to do so. In gene

1. Normal execution MULTI Set K1 v1 Set K2 v2 Get K1 Set K3 v3 Exec 2. Discard Transactions MULTI Set K1 v1 Set K2 v2 Set K3 v3 DISCARD 3. All guilt MULTI Set K1 v1 Set K2 v2 Set K3 v3 Getset K3 Set K4 v4 Set K5 v5 Exec ERROR, 4.

execute concurrent transactions at the same time.selectAs a result, the system considers itself as a legal operation and queues for subsequent transactions. As a result, duplicate data may be inserted. For example, if there is only one commodity, two sales orders are created.How to Prevent concurrency Problems In the transaction According to the previous articleInsert, update, or deleteTransactions can be serialized manually at the default

Subscribe. In Redis, you can set a key value for message publishing and message subscription, After a message is published on a key value, all clients that subscribe to it will receive the corresponding message. The most obvious usage of this function is to use it as a real-time messaging system, such as Common Instant chat and group chat functions. Client 1: subscribe rain Client 2: PUBLISH rain "my love !!! " (Integer) 2 indicates that severa

This article mainly introduces the PHP + Redis basic operation, has a certain reference value, now share to everyone, the need for friends can refer to String type operation The string is the most basic type of Redis, and the string type is binary safe. This means that a Redis string can contain any data. For example, JPG images or serialized objects $

[Redis album] [1] methods and steps for installing php-redis under ubuntu12.04, redisphp-redis First release path: Install phpredis I haven't written a blog post for a long time, and I haven't completed many blog posts. Today I just took the time to finish this blog post. I hope it will be helpful to you. First, let's give a brief introduction to

String type operation The string is the most basic type of Redis, and the string type is binary safe. This means that a Redis string can contain any data. For example, JPG images or serialized objects $redis->set (' key ', ' TK '); $redis->set (' number ', ' 1 '); $redis->se

in a sorted setZrem, Zdelete-remove One or more members from a sorted setZremrangebyrank, Zdeleterangebyrank-remove all members in a sorted set within the given indexesZremrangebyscore, Zdeleterangebyscore-remove all members in a sorted set within the given scoresZrevrange-return a range of members in a sorted set, by index, with scores orderedZscore-get the score associated with the given member in a sorted setZunion-add multiple sorted sets and store the resulting sorted set in a new keyZscan