[ovirt-users] DevConf.CZ 2016 - my experience

[Yaniv Kaul]

On the first weekend of February I've had the pleaseure of attending
DevConf.CZ 2016, which took place in the wonderful city of Brno, CZ.
Compared to FOSDEM, it's a more relaxed, young and vibrant conference, but
it was just as fun and rewarding from my perspective.
Here's a disorganized personal summary:

- Met community members as well as customers and Red Hat TAMs (Technical
Account Managers) from all over Europe.
- Attended a presentation on a research to understand theoretical best
possible improvements to migration convergence performance[3]. I hope to
see some of it in coming versions of QEMU, while we work on other
improvements to this critical feature.
- Attended a presentation on the status of ARM on Fedora and CentOS[14].
Seems like a great positive effort, but the road is still long for complete
support. Would be cool to support ARM based hosts running virtual machines!
- Attended a presentation on native vs. threads implementation performance
in QEMU[4]. The results were not conclusive, though some improvements in
native brought it close to or better in some cases to threads. Seems that
our default of heuristic for threads in file-based storage and native in
block based storage is fine for the time being, but we'll watch closely for
developments in this area.
- Attended a presentation on debugging qemu (mainly) in OpenStack[5] - I
think (and asked) if libvirt can do a better job - in saving in a cyclic
log the QMP commands sent and the response from the guest and dump it in
case of a guest crash.
- Attended a Cockpit hackfest[9] - as we intend to use Cockpit as our UI
for RHEVH Next Generation Node, it was great to present our use case and
exchange thoughts, ideas and directions. Few bugs were filed during the
hackfest per our comments.
- Attended 'Dockerizing JBoss Applications' presentation[10]. Great work
done by the JBoss team to improve and streamline packaging of JBoss into
containers.
- Attended 'Fedora Upstream Testing' presentation[13]. I disscussed with
the presentor the possibiliy to run oVirt with Lago[17] in Fedora, in a CI
way, by monitoring distgit changes for relevant packages (such as lvm2,
device-mapper*, libvirt and others.
- Attended 'High Performance VMs in OpenStack'[12] - looks like oVirt is
already doing a lot of what OpenStack are working to achieve
high-performance from KVM!
- Preached on running Lago with OpenStack, Gluster and Cockpit. At least
the first two items look really promising and I'm looking forward to a
collaboration in those efforts. I might just try to do the Gluster one
myself.
- Having used the oVirt Live[18] USB DoK image in both FOSDEM and DevConf,
I've found several items where we can improve in and filed relevant RFEs
for them[15][16].

- The oVirt team has delivered numerous presentations in the virtualization
track[1][2][6] - and the Gluster team has additionally provided more
presentations[7][8], which were all well received.

I'd like to thank Red Hat's OSAS team members Mikey and Brian for once
again, just one week after FOSDEM, leading the effort of representing the
oVirt project and community in this event.
Y.

[1] https://www.youtube.com/watch?v=cQqJEiK7-Ug - Smart VM Scheduling -
Martin Sivák
[2] https://www.youtube.com/watch?v=V1JQtmdleaM - Host fencing in oVirt -
Fixing the unknown and allowing VMs to be highly available - Martin Peřina
[3] https://www.youtube.com/watch?v=XkMIMJKJeTY - in-depth look of virtual
machine migration algorithms - Marcelo Tosatti
[4] https://www.youtube.com/watch?v=Jx93riUF5_I - Qemu Disk I/O: Which
performs better, Native or Threads? - Pradeep K Surisetty
[5] https://www.youtube.com/watch?v=Dd2AGGMWXQM - Debugging the
Virtualization Layer (libvirt and QEMU) in OpenStack - Kashyap Chamarthy
[6] https://www.youtube.com/watch?v=4CbHTAkVDZo - Ceph integration with
oVirt using Cinder - Nir Soffer
[7] https://www.youtube.com/watch?v=XudYwEWQF7U - oVirt and Gluster
Hyperconvergence - Ramesh Nachimuthu
[8] https://www.youtube.com/watch?v=TczVVCbm8NE - Improvements in gluster
for virtualization usecase - Prasanna Kumar Kalever
[9] https://www.youtube.com/watch?v=TNDe90WSZow - Cockpit Hackfest -
Dominik Perpeet, Marius Vollmer, Peter Volpe, Stef Walter
[10] https://www.youtube.com/watch?v=NpyEoFlDzOQ - Dockerizing JBoss
Products - David Becvarik
[11] https://www.youtube.com/watch?v=rqavfmPAt7o - Avocado and Jenkins:
Test Automation and CI - Lukáš Doktor, Yash Mankad
[12] https://www.youtube.com/watch?v=9J_sEdlpIlQ - High performance VMs in
OpenStack - Nikola Dipanov
[13] https://www.youtube.com/watch?v=15-yXOJuonQ - Upstream First Testing -
Tim Flink
[14] https://www.youtube.com/watch?v=q4gU87wdRtI - Growing the ARM server
ecosystem - Jim Perrin
[15] https://bugzilla.redhat.com/show_bug.cgi?id=1307261 - [RFE] register
.vv files so they'll be opened automatically with remote-viewer
[16] https://bugzilla.redhat.com/show_bug.cgi?id=1307262 - [RFE] Disable
power management (display and computer)
[17] https://github.com/lago-project/lago
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