首页 \ 问答 \ BLPOP和MISCONF Redis配置为保存RDB快照(BLPOP and MISCONF Redis is configured to save RDB snapshots)

BLPOP和MISCONF Redis配置为保存RDB快照(BLPOP and MISCONF Redis is configured to save RDB snapshots)

 我们在ELK堆栈中使用Redis来缓冲我们的系统和Elasticsearch之间的消息。 消息由自定义log4j-appender推送到redis，并由logstash弹出。  
 现在出现了问题：如果redis队列正在运行（因为例如Elasticsearch没有运行），redis切换到某种模式不再允许持久性更改。 这是有道理的，但是从Redis弹出消息（因为例如ES再次启动）将减少redis中队列的大小。  
 如果队列已满，是否可以选择配置redis以允许blpop？  
 最好的问候本杰明 

we use Redis in an ELK stack for buffering messages between our systems and Elasticsearch. The messages are pushed into redis by a custom log4j-appender and popped by logstash. 
Now there comes the problem: if the redis queue is running full (because e.g Elasticsearch is not running) redis switches to a mode were no persistent changes are allowed anymore. This makes sense, but popping messages from Redis (because e.g. ES is up again) would reduce the size of the queue in redis. 
Is there an option to configure redis to allow blpop if the queue is full? 
Best regards Benjamin

原文：https://stackoverflow.com/questions/34307670

更新时间：2024-01-23 16:01

最满意答案

 它们之间的唯一区别是一个是对象的字符串表示，而第二个是javascript对象。  
 
 
  
  var json_content = '[{"key":"value"}]';
console.log("json_content"+json_content);

var json_content = [{"key":"value"}];
console.log("json_content"+json_content); 
  
 
 
 您的代码中还发生的另一件事是您在console.log()语句中使用串联+ 。 
 对我来说，你应该避免使用这种方式并尝试使用,而是：  
 
 
  
  var json_content = '[{"key":"value"}]';
console.log("json_content", json_content);

var json_content = [{"key":"value"}];
console.log("json_content", json_content); 
  
 
 
 对于你的最后评论：  
 
 
  
  var json_content = '[{"key":"value"}]';
json_content = JSON.parse('[{"key":"value"}]');
console.log("json_content"+json_content); 
  
 

The only difference between them is that one is a string representation of object while second one is javascript object.  
 
 
  
  var json_content = '[{"key":"value"}]';
console.log("json_content"+json_content);

var json_content = [{"key":"value"}];
console.log("json_content"+json_content); 
  
 
 
One more thing is happening in your code is that you are using concatenation + in your console.log() statements.
 To me you should avoid using such way and try with , instead:  
 
 
  
  var json_content = '[{"key":"value"}]';
console.log("json_content", json_content);

var json_content = [{"key":"value"}];
console.log("json_content", json_content); 
  
 
 
For your last comment:  
 
 
  
  var json_content = '[{"key":"value"}]';
json_content = JSON.parse('[{"key":"value"}]');
console.log("json_content"+json_content);

BLPOP和MISCONF Redis配置为保存RDB快照(BLPOP and MISCONF Redis is configured to save RDB snapshots)

最满意答案

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