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For more information, I use ocata version.

2018년 10월 29일 (월) 오후 10:07, SeongSoo Cho <ppiyakk2 at printf.kr>님이 작성:

> Hello, All
>
> I have a terrible problem with object server.
> Here is the case.
> 1. User upload an object to proxy-server
> 2. Proxy server try to connect with object-server
> 3. If one of object-server is slow to respond, proxy-server is waiting for
> response.
>   3.1 While waiting for response, proxy-server can't do anything
> 4. So, The response of client request will be delayed.
>
> In my opinion, this code seems to be a problem
> (
> https://github.com/openstack/swift/blob/stable/rocky/swift/proxy/controllers/obj.py#L1734
> )
>
> ```
> with ResponseTimeout(node_timeout):
>             resp = conn.getexpect()
> ```
>
> If node_timeout's value is 3 and object-server respond after 2 seconds,
> proxy-server wait 2 seconds.
>
> Because proxy-server wait for the above response, the execution of the
> following code is delayed.
> (
> https://github.com/openstack/swift/blob/stable/rocky/swift/proxy/controllers/obj.py#L627
> )
>
> ```
> for node in nodes:
>             try:
>                 putter = self._make_putter(node, part, req, headers)
>                 self.app.set_node_timing(node, putter.connect_duration)
>                 return putter
> ```
>
> This problem occurs when i do a ring rebalance.
> When object-replicator delete a partition directory that are no longer
> mine, the disk becomes very busy (Because of xfsaild daemon)
> Because the disk are busy, object-server can't create diskfile during PUT
> operation.
>
> Is there anyone who is having problems like me?
> How can I solve this problem?
>
> I need everyone's help.
> Thanks.
>
> Best Regards
> SeongSoo Cho
>
> ------
> SeongSoo Cho (South Korea)
>
>
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