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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2021/09/07 08:17:04 UTC
[GitHub] [dubbo] startjava opened a new issue #8710: FAIL_OVER和FAIL_BACK 区别
startjava opened a new issue #8710:
URL: https://github.com/apache/dubbo/issues/8710
有没有大佬介绍一下DUBBO中FAIL_OVER和FAIL_BACK 区别
就是在运行效率上的区别，而不是单纯文字上的，百度搜了一些，没有一个说的比较具体的。
感谢
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[GitHub] [dubbo] changfubai commented on issue #8710: FAIL_OVER和FAIL_BACK 区别
Posted by GitBox <gi...@apache.org>.
changfubai commented on issue #8710:
URL: https://github.com/apache/dubbo/issues/8710#issuecomment-914265440
原来这里还有一场讨论啊 哈哈
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[GitHub] [dubbo] wangchengming666 commented on issue #8710: FAIL_OVER和FAIL_BACK 区别
Posted by GitBox <gi...@apache.org>.
wangchengming666 commented on issue #8710:
URL: https://github.com/apache/dubbo/issues/8710#issuecomment-914146565
FAIL_OVER我的理解是，当我们的应用是集群模式，请求当出现失败的时候，会尝试集群中其他节点。用户可以通过retries="2"设置重试次数。这是Dubbo的默认容错机制，会对请求做负载均衡。通常使用在读操作或者幂等性写操作上，但是重试操作会导致接口的延迟增大，在下游机器负载已经到达极限的情况下，重试会增加下游机器的负载。
FAIL_BACK我的理解是请求失败之后，会自动记录失败的请求，并由RetryTimerTask定时重试，适用一些异步或者最终以执行的请求，官方也在javaDoc中写道：Especially useful for services of notification.适合消息通知的场景
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[GitHub] [dubbo] CrazyHZM closed issue #8710: FAIL_OVER和FAIL_BACK 区别
Posted by GitBox <gi...@apache.org>.
CrazyHZM closed issue #8710:
URL: https://github.com/apache/dubbo/issues/8710
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[GitHub] [dubbo] dkisser commented on issue #8710: FAIL_OVER和FAIL_BACK 区别
Posted by GitBox <gi...@apache.org>.
dkisser commented on issue #8710:
URL: https://github.com/apache/dubbo/issues/8710#issuecomment-914144638
`/**
* When invoke fails, log the initial error and retry other invokers (retry n times, which means at most n different invokers will be invoked)
* Note that retry causes latency.
* <p>
* <a href="http://en.wikipedia.org/wiki/Failover">Failover</a>
*
*/
public class FailoverClusterInvoker<T> extends AbstractClusterInvoker<T> {
......
`
`/**
* When fails, record failure requests and schedule for retry on a regular interval.
* Especially useful for services of notification.
*
* <a href="http://en.wikipedia.org/wiki/Failback">Failback</a>
*/
public class FailbackClusterInvoker<T> extends AbstractClusterInvoker<T> {
......
`
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[GitHub] [dubbo] CrazyHZM commented on issue #8710: FAIL_OVER和FAIL_BACK 区别
Posted by GitBox <gi...@apache.org>.
CrazyHZM commented on issue #8710:
URL: https://github.com/apache/dubbo/issues/8710#issuecomment-921658477
@startjava
Does the above answer answer you? I will temporarily close the issues, if you still have any questions, you can reopen it.
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