[openstack-dev] [tc] [all] OpenStack moving both too fast and too slow at the same time

Jonathan Proulx jon at csail.mit.edu
Fri May 5 20:17:29 UTC 2017

On Fri, May 05, 2017 at 02:04:43PM -0600, John Griffith wrote:
:On Fri, May 5, 2017 at 11:24 AM, Chris Friesen <chris.friesen at windriver.com>

:> Cinder theoretically supports LVM/iSCSI, but if you actually try to use it
:> for anything stressful it falls over.
:​Oh really?​
:​I'd love some detail on this.  What falls over?

I'm a bit out of date on this personally, but we ditched all iSCSI a
few years ago becasue we found it generally flaky on Linux. We we were
motly using Equallogic SAN both for OpenStack and stand alone servers
but saw same issues with some other targets as well.

So I wonder if this is a Cinder issue or just a Linux issue.

What we saw fall over was any slight network bump would permanently
drop conenct to backing storage requiring reset.  But as I say this
was decidedly not a Cinder issue.


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