[Gluster-devel] Slow volume, gluster volume status bug

[Atin Mukherjee]

On Mon, Nov 13, 2017 at 10:10 PM, Emmanuel Dreyfus <manu at netbsd.org> wrote:

> Hello
>
> I am looking for hints about how to debug this:
>
> I have a 4x2 Distributed-Replicate volume which exhibits extremely slow
> operations. Example:
> # time stat /gfs/dl
> 51969 10143657874486987692 drwxr-xr-x 4 _httpd wheel 172912968 4096 "Nov
> 13 17:22:12 2017" "Sep 22 11:53:35 2017" "Sep 22 11:53:35 2017" "Jan  1
> 01:00:00 1970" 131072 8 0 /gfs/dl
>     8.72s real     0.00s user     0.01s system
>
> But the thing is not 100% reproductible. Sometime I get an isntant
> (normal) response.
>
> gluster volume status also exhibits trouble: each server will only
> list its bricks, but not the other's one. I suspect it could just
> be some tiemout because of slow answer from the peer.
>

Have you checked the output of gluster peer status? Also does glusterd log
file give any hint on time outs, rpc failures, disconnections et all?


> tcpdump tells me that the server can take seconds to answer.
> Brick logs show nothing special.
>
> Any idea?
>
> --
> Emmanuel Dreyfus
> manu at netbsd.org
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