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node 使用 redis 来缓存数据,需要每次请求都创建链接吗?

目的:使用redis来缓存网站的固定内容数据在node开启的时候

遇到的问题:

var redis = require('redis'),
    client = redis.createClient();
    
client.hset([hash, hashtest, value],function(err,reply){
               callback(err,reply);
               // client.quit();
});

client.hget([hash,hashtest],function(err,reply){
               callback(err,reply);
               // client.quit(); 
})   

每次在请求完成以后是否需要client.quit 关闭链接,然后在请求的时候再次createClient 链接呢??

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爵霸 2016-03-09 10:53:06 3236 0
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  • 在配置文件中有两个配置与此相关:
    maxclients用来设置支持的最大客户端连接,超过了就拒绝;这来设置你的redis客户端能够同时支持多少连接;(当然,除了这个值,还需要看linux系统的limit设置)
    timeout 超时设置,用来设置一个用户连接之后,多长之内没有触发redis请求,就从服务器端主动关闭这个连接,以节省系统资源;

    # Set the max number of connected clients at the same time. By default
    # this limit is set to 10000 clients, however if the Redis server is not
    # able to configure the process file limit to allow for the specified limit
    # the max number of allowed clients is set to the current file limit
    # minus 32 (as Redis reserves a few file descriptors for internal uses).
    #
    # Once the limit is reached Redis will close all the new connections sending
    # an error 'max number of clients reached'.
    #
    # maxclients 10000
    
    # Set the max number of connected clients at the same time. By default
    # this limit is set to 10000 clients, however if the Redis server is not
    # able to configure the process file limit to allow for the specified limit
    # the max number of allowed clients is set to the current file limit
    # minus 32 (as Redis reserves a few file descriptors for internal uses).
    #
    # Once the limit is reached Redis will close all the new connections sending
    # an error 'max number of clients reached'.
    #
    # maxclients 10000
    # Close the connection after a client is idle for N seconds (0 to disable)
    timeout 0

    对于redis的连接请求,一般有以下两种场景设置:

    1.触发用户请求的server有限(比如100个以内),这就可以将timeout 设置为0,这样redis连接请求永远有效,连接一次后不再断开;只在服务重启或出错后重连;

    2.大量用户数并发请求,这种情况,可以将timeout 设置在几分钟之内(根据业务来确定),而客户端连接以后后不主动关闭连接,在发现连接被关闭(由于超时被服务器关闭)后再请求连接;

    2019-07-17 18:55:34
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