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This article will explain in detail the sample analysis of transaction management in Redis. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

In Redis, we can implement simple transaction management through multi and exec commands. The multi command represents the beginning of the transaction, the exec command represents the end of the transaction, and the commands executed between the two commands are atomic when used. Let's take a look at the specific use.

As shown in the figure above, we know that when using Redis transaction management, we executed a successful command between the multi and exec commands, and the result returned was QUEUED. This means that the command is not actually executed and is temporarily saved in Redis. If we use another client to get the key in the figure above, the result returned must be 0, because the command is not executed successfully, that is, the transaction is not committed.

Transactions in Redis are committed only when the exec command is executed. After the commit, we execute the command on the client side, and we will get the data of the successful execution in the transaction.

If we want to stop the transaction, we can use the discard command.

Let's take a look at the considerations when using Redis transactions.

Command error: if we are using a transaction, if there is an error in executing the command, it will cause the transaction to fail to commit.

Run-time error: if the command we execute in the transaction has no syntax errors, such as writing the sadd command as a zadd command, this is a run-time error. This kind of error Redis will successfully commit the transaction, so when you encounter this kind of error, you need to deal with it yourself.

In some businesses, transactions are committed to ensure that the key in the transaction has not been modified by other clients, otherwise optimistic locks are not executed. In Redis, we can solve this kind of problem by using the watch command. Let's take a look at the specific operation.

Client 1:

Client 2:

This is the function of transaction management in Redis. Compared with transactions in traditional relational databases, transaction management in Redis is much simpler, because transactions in relational databases support a lot of complex logical calculations and support rollback functions. However, transaction management in Redis does not support the above functions. This is also the main difference between them.

This is the end of this article on "sample Analysis of transaction Management in Redis". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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