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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2022/04/10 13:16:54 UTC

[GitHub] [rocketmq] MatrixHB commented on issue #4137: Why doesn't rocketmq send files with sendfile like Kafka?

MatrixHB commented on issue #4137:
URL: https://github.com/apache/rocketmq/issues/4137#issuecomment-1094273446

   > > 
   > 
   > 这是用了mmap，但是没有用到sendfile哇
   
   是的，这里ManyMessageTransfer重写了DefaultFileRegion的transferTo()方法，还是使用mmap，没有使用sendfile。曾经有个PR就对此做了修改：[#1933](https://github.com/apache/rocketmq/pull/1933)
   
   使用sendfile代替rocketmq，对读写性能会有多大的提升，是否带来其他的问题，未有定论。如果你有余力可以尝试优化和测试一把，可以加入rocketmq的性能优化SIG进一步探讨。
   


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