[Gluster-users] What I noticed while upgrading 3.7.6 to 3.7.8

Atin Mukherjee amukherj at redhat.com
Sun Feb 28 16:50:20 UTC 2016

On 02/28/2016 04:48 PM, ML mail wrote:
> Hi,
> I just upgraded from 3.7.6 to 3.7.8 and noticed the following 2 points:
> 1) As others on the mailing list I am also affected by a massive performance drop on my FUSE mount. I used to have around 10 MB/s transfer, which is already quite slow, but now since the upgrade I am at around 2 MB/s as you can see below:
> $ sudo dd if=/dev/zero of=bwtest bs=1M count=64
> 64+0 records in
> 64+0 records out
> 67108864 bytes (67 MB) copied, 37.9311 s, 1.8 MB/s
> I know there is a bug (#1309462) already opened for that but just thought I would mention it too and hope that it will be fixed in 3.7.9.
> 2) I noticed that the ping-timeout option in /etc/glusterfs/glusterd.vol changed from 30 seconds to 0 seconds. Can someone comment on that change? and does this mean that with 0 seconds it never times out?
This indicates that there is no ping mechanism between GlusterDs now. We
have had some issues from snapshot use cases when we tried to enable
ping timer in glusterd, the solution to it was multi threaded epoll and
when we enabled it then we got to see some corruption and crashes which
are yet to be RCAed. So we decided to turn both these features off till
we get to the root cause.

> Regards
> ML
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