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How to use C # to write a Redis data synchronization gadget, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain for you in detail, people with this need can come to learn, I hope you can get something.

Concept

Redis is an open source ANSI C language to write, support network, memory-based and persistent log, Key-Value database, similar to Memcached, it supports the storage of relatively more value types, including string (string), list (linked list), set (collection), zset (sorted set-ordered collection) and hash (hash type). On this basis, redis supports a variety of different sorting methods. Like memcached, data is cached in memory for efficiency. The difference is that redis will periodically write updated data to disk or modify operations to additional record files, and on this basis to achieve master-slave (master-slave) synchronization.

Redis supports master-slave synchronization. Data can be synchronized from the master server to any number of slave servers, which can be the master server associated with other slave servers. This makes it possible for Redis to perform single-layer tree replication. Save the disk can intentionally or unintentionally write to the data.

Intro#

A gadget written to implement data migration for redis that synchronizes redis data from one instance to another. Originally intended to find an existing tool to do, found a nodejs gadget, but did not install it for a long time. So I wrote this gadget myself.

The reason why we write a tool instead of using the redis backup mechanism is mainly because we use redis cloud service, so we can't SSH like our own server to synchronize the redis data of the cloud service to the redis instance on our own server.

Basic use of # configuration interpretation #

{"AppSettings": {"SyncDatabases": "0 1", "BatchSize": 50}, "ConnectionStrings": {"Source": "redis1:6379,asyncTimeout=30000,syncTimeout=30000", "Dest": "redis2:6379,password=123433,asyncTimeout=30000,syncTimeout=30000"}}

AppSettings:SyncDatabases is a redis database to be synchronized. Multiple databases are separated by commas in English. AppSettings:BatchSize is read N key (paged reads, N per page) from the source redis server at a time. ConnectionStrings:Source represents the source redis server connection string ConnectionStrings:Dest represents the target redis server connection string.

For more information on the parameters of redis connection string, please see the document: https://weihanli.github.io/StackExchange.Redis-docs-zh-cn/Configuration.html

Perform migration #

After modifying the redis configuration (setting the timeout according to the amount of data you want to synchronize), run dotnet run in the project root directory

Sample Run#

More#

Data types that support synchronization / migration:

String Hash List Set ZSet (SortedSet)

Implementation source code: https://github.com/WeihanLi/SamplesInPractice/tree/master/RedisCopy

Reference#

Https://github.com/WeihanLi/SamplesInPractice/tree/master/RedisCopyhttps://weihanli.github.io/StackExchange.Redis-docs-zh-cn/Configuration.html

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