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In view of how to avoid network delay in Redis database, this article introduces the corresponding analysis and answer in detail, hoping to help more partners who want to solve this problem to find a more simple and easy way.

How to avoid the network delay of Redis database

When you need to use Redis to process multiple commands, it may not be cost-effective to waste time on network latency. Here are several ways to avoid network latency when using Redis, all of which are combined requests to varying degrees:

Use the variable parameter commands in the new version of Redis

In Redis2.4, many command parameters are supported in batches, such as SADD, ZADD, LPUSH, RPUSH, HMSET and so on. If you want to call the same command multiple times with different parameters, it is best to see if it already supports finger parameters. In this way, your command only needs to be sent and received once at a time.

Using the pipelining mechanism of Redis

Redis itself supports pipelining mode to accept commands, which means you can send multiple commands to Redis at a time and then wait for them to return. The returned results are also in the same order as the data you sent. For example, the simplest example is as follows:

$(echo-en "PINGrnPINGrnPINGrn"; sleep 1) | nc localhost 6379

+ PONG

+ PONG

+ PONG

How to avoid the network delay of Redis database

Of course, it depends on whether the language client you use supports it.

Use the upcoming Lua script embedding feature

Lua script embedding provides more flexibility, and you can not only customize and combine your commands. You can also handle your business logic completely on the server side. There is no need to retrieve the data back to the client for processing and then request the client.

Use the SORT command to retrieve multiple key

This is a bit geek, if you use the form of double-layer index to organize your data in Redis, for example, the first layer index is a list, which places all the data key corresponding to id, and the second layer is to find the specific value through these id.

For example, if we store user data, we may use uid as key user information as value, while we have a list that stores a uid list of users with certain characteristics, such as today's active users, so when we need to fetch all active user information, we don't have to get this list first, and then use get or multiget to get user information. We can complete the data acquisition with the following SORT command.

Redis > SORT HotUser:list BY nonexistentkey GET FooBar | id | *

Where nonexistent means to sort in a natural order, so that Redis does not perform the corresponding sorting operation and returns the result directly.

This is the answer to the question about how to avoid network delay in the Redis database. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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