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fd迁移方案的疑问 #2

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wuyupengwoaini opened this issue Jan 6, 2021 · 1 comment
Open

fd迁移方案的疑问 #2

wuyupengwoaini opened this issue Jan 6, 2021 · 1 comment

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@wuyupengwoaini
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目前我在调研Netty的fd迁移方案，有幸看到大佬的Netty实现。想请问一下，之前貌似是使用的SO_REUSEPORT的方案来实现的，后来又改成了基于uds来实现的，请问如果是基于SO_REUSEPORT来实现的话，是有什么问题吗？
@zhenjunMa
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我居然现在才看到这个issue...

用SO_REUSEPORT的话比较省事，不用进行listener的迁移，也就是说新进程启动以后直接开一个listener监听端口，然后旧进程关闭监听即可。用uds的话就需要把listener也进行迁移，不过我已经试过了，listener迁移也是可行的，所以这两种方案没有什么本质区别，非要说的话就是SO_REUSEPORT对内核版本有要求，但现在用的应该都支持

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@wuyupengwoaini @zhenjunMa