[Gluster-users] GlusterFS as virtual machine storage

[Pavel Szalbot]

Hey guys,

I got another "reboot crash" with gfapi and this time libvirt-3.2.1
(from cbs.centos.org). Is there anyone who can audit the libgfapi
usage in libvirt? :-)

WK: I use bonded 2x10Gbps and I do get crashes only in heavy I/O
situations (fio). Upgrading system (apt-get dist-upgrade) was ok, so
this might be even related to amount of IOPS.

-ps


On Sun, Sep 10, 2017 at 6:37 AM, WK <wkmail at bneit.com> wrote:
> I'm on 3.10.5. Its rock solid (at least with the fuse mount <Grin>)
>
> We are also typically on a somewhat slower GlusterFS LAN network (bonded
> 2x1G, jumbo frames) so that may be a factor.
>
> I'll try to setup a trusted pool to test libgfapi soon.
>
> I'm curious as to how much faster it is, but the fuse mount is fast enough,
> dirt simple to use, and just works on all VM ops such as migration, snaps
> etc, so there hasn't been a compelling need to squeeze out a few more I/Os.
>
>
>
>
>
>
> On 9/9/2017 3:08 PM, lemonnierk at ulrar.net wrote:
>
> Mh, not so sure really, using libgfapi and it's been working perfectly
> fine. And trust me, there had been A LOT of various crashes, reboots and
> kill of nodes.
>
> Maybe it's a version thing ? A new bug in the new gluster releases that
> doesn't affect our 3.7.15.
>
> On Sat, Sep 09, 2017 at 10:19:24AM -0700, WK wrote:
>
> Well, that makes me feel better.
>
> I've seen all these stories here and on Ovirt recently about VMs going
> read-only, even on fairly simply layouts.
>
> Each time, I've responded that we just don't see those issues.
>
> I guess the fact that we were lazy about switching to gfapi turns out to
> be a potential explanation <grin>
>
> -wk
>
>
>
>
>
>
> On 9/9/2017 6:49 AM, Pavel Szalbot wrote:
>
> Yes, this is my observation so far.
>
> On Sep 9, 2017 13:32, "Gionatan Danti" <g.danti at assyoma.it
> <mailto:g.danti at assyoma.it>> wrote:
>
>
>     So, to recap:
>     - with gfapi, your VMs crashes/mount read-only with a single node
>     failure;
>     - with gpapi also, fio seems to have no problems;
>     - with native FUSE client, both VMs and fio have no problems at all.
>
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