Hey Jayme,  everyone
I saw that most related bugs are closed wontfix and a comment that not enough performance increase was found.
I think it would help if you could update the related bugzilla entries with the performance results that you observed.

Anyone interested in this feature, or with benchmark results should post them in :
https://bugzilla.redhat.com/show_bug.cgi?id=1484227
https://bugzilla.redhat.com/show_bug.cgi?id=1465810


Guillaume Pavese
Ingénieur Système et Réseau
Interactiv-Group


On Thu, Dec 19, 2019 at 11:44 AM Jayme <jaymef@gmail.com> wrote:
It would be nice to see some progress. I have no idea why there wouldn’t be interest in adding to rhev. The io performance increase I saw while testing was phenomenal 

On Wed, Dec 18, 2019 at 9:42 PM Guillaume Pavese <guillaume.pavese@interactiv-group.com> wrote:
The bug has been closed wontfix for a lack of perceived progress on the issue : 

However when following the related opened bugs in qemu, i get the feeling things are getting ready to have libgfapi working in a replica 3 cluster. See : https://bugzilla.redhat.com/show_bug.cgi?id=1465810

I wish someone would reopen those closed bugs in order for that issue not being forgotten.

Guillaume Pavese
Ingénieur Système et Réseau
Interactiv-Group


On Tue, Dec 17, 2019 at 7:21 AM Jayme <jaymef@gmail.com> wrote:
I believe the snapshot issue is only present with gluster replica 3 volumes.  I can confirm it on my replica 3 cluster

On Mon, Dec 16, 2019 at 4:18 PM Alex McWhirter <alex@triadic.us> wrote:

I also use libgfapi in prod.


1. This is a pretty annoying issue, i wish engine-config would look to see if it already enabled and just keep it that way.

2. Edit /etc/libvirt/qemu.conf and set dynamic ownership to 0, will stop the permission changes.

3. I don't see this error on any of my clusters, all using libgfapi.


I also have no issues using snapshots with libgfapi, but live migration between storage domains indeed does not work.


On 2019-12-16 12:46, Darrell Budic wrote:

I use libgfap in production, the performance is worth a couple of quirks for me.
 
- watch major version updates, they'll silently turn it off because the engine starts using a new version variable
- VM/qemu security quirk that resets ownership when the VM quits, was supposedly fixed in 4.3.6 but I still have it happen to me, a cron'd chown keeps it under control for me
- some VMs cause a libvirt/vdsmd interaction that results in failed stats query, and the engine thinks my VMs are offline because the stats gathering is stuck. hoped a bug fix in 4.3.6 would take care of this too, but didn't. may be my VMs though, still analyzing for specific file issues
 
I need to spend some time doing a little more research and filing/updating some bug reports, but it's been a busy end of year so far...
 
  -Darrell

On Dec 14, 2019, at 5:47 PM, Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

 
According to GlusterFS Storage Domain 
the feature is not the default as it is incompatible with Live Storage Migration.
 
Best Regards,
Strahil Nikolov
 
 
В събота, 14 декември 2019 г., 17:06:32 ч. Гринуич+2, Jayme <jaymef@gmail.com> написа:
 
 
Are there currently any known issues with using libgfapi in the latest stable version of ovirt in hci deployments?  I have recently enabled it and have noticed a significant (over 4x) increase in io performance on my vms. I'm concerned however since it does not seem to be an ovirt default setting.  Is libgfapi considered safe and stable to use in ovirt 4.3 hci?
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