From kripper at imatronix.cl Fri May 15 14:01:33 2015 Content-Type: multipart/mixed; boundary="===============7019613298582216735==" MIME-Version: 1.0 From: Christopher Pereira To: devel at ovirt.org Subject: Re: [ovirt-devel] BlockCommit for Clone VM Date: Fri, 15 May 2015 15:01:30 -0300 Message-ID: <5556347A.5040606@imatronix.cl> In-Reply-To: 2FD5A2F9-97F4-4491-848E-4D2E8510A9ED@redhat.com --===============7019613298582216735== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable This is a multi-part message in MIME format. --------------030004050500020509080908 Content-Type: text/plain; charset=3Dwindows-1252; format=3Dflowed Content-Transfer-Encoding: 8bit Thanks Michal. We scripted a live backup tool using libvirt snapshots + gluster (with = SEEK_HOLE hacks [1]) + block-commit. It works like a sharm. This is probably the most efficient way to create live backups = available. MicroCheckpointing [2] looks promising too but I'm worried = about its costs. Its wonderfull to have all this tools like libvirtd and qemu available. = Thanks Fabrice Bellard [3]! Thanks OpenSource! We tried the wonderful REST API first. It was really a very good = experience how easy it was to get the expected results, error messages = and supported actions (RSDL). API was gentle to tell us that live migration was not supported (VM must = be down). We finally scripted libvirt directly to have access to all features, but = it would be great to use the REST API whenever possible to keep = consistency and use oVirt Engine as Front-End. Have a good one. [1] Accessing the bricks directly supports SEEK_HOLE and boosts = performance (sparse image copying takes seconds instead of hours). [2] http://wiki.qemu.org/Features/MicroCheckpointing [3] http://en.wikipedia.org/wiki/Fabrice_Bellard On 15-05-2015 7:08, Michal Skrivanek wrote: > On 13 May 2015, at 05:51, Christopher Pereira wrote: > >> Hi Nir, >> >> I'm interested in using BlockCommit [1]. >> Can we use it for Clone VM via REST API [2]? > we planned to have Clone VM from VM for running VMs using snapshot&live m= erge, but due to delays of live merge feature it's not in 3.6. > You can possibly script it yourself via API in latest 3.5.z and EL7 > > Thanks, > michal > >> [1] http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit >> [2] http://www.ovirt.org/Features/Clone_VM >> >> _______________________________________________ >> Devel mailing list >> Devel(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/devel > -- = *J. Christopher Pereira* Gerente General IMATRONIX S.A. www.imatronix.com M=C3=B3vil : (09) 72 188 630 Santiago: (+56) (02) 28 99 44 60 + anexo 800 Valpara=C3=ADso: (+56) (32) 2 76 80 77 + anexo 800 --------------030004050500020509080908 Content-Type: text/html; charset=3Dwindows-1252 Content-Transfer-Encoding: 8bit

Thanks Michal.

We scripted a live backup tool using libvirt snapshots + gluster (with SEEK_HOLE hacks [1]) + block-commit. It works like a sharm.
This is probably the most efficient way to create live backups available. MicroCheckpointing [2] looks promising too but I'm worried about its costs.
Its wonderfull to have all this tools like libvirtd and qemu available. Thanks Fabrice Bellard [3]! Thanks OpenSource!

We tried the wonderful REST API first. It was really a very good experience how easy it was to get the expected results, error messages and supported actions (RSDL).
API was gentle to tell us that live migration was not supported (VM must be down).

We finally scripted libvirt directly to have access to all features, but it would be great to use the REST API whenever possible to keep consistency and use oVirt Engine as Front-End.

Have a good one.

[1] Accessing the bricks directly supports SEEK_HOLE and boosts performance (sparse image copying takes seconds instead of hours).
[2] http://wiki.qemu.org/Features/MicroCheckpointin= g
[3] http://en.wikipedia.org/wiki/Fabrice_Bellard

On 15-05-2015 7:08, Michal Skrivanek wrote:

On 13 May 2015, at 05:51, Christopher Pereira wrote:

Hi Nir,

I'm interested in using BlockCommit [1].
Can we use it for Clone VM  via REST API [2]?

we planned to have Clone VM from VM for running VMs using snapshot&live=
 merge, but due to delays of live merge feature it's not in 3.6.
You can possibly script it yourself via API in latest 3.5.z and EL7

Thanks,
michal

[1] http://wiki.libvirt.org/page/Liv=
e-disk-backup-with-active-blockcommit
[2] http://www.ovirt.org/Features/Clone_VM

_______________________________________________
Devel mailing list
Dev=
el(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/devel

--

J. Christopher Pereira
Gerente General
IMATRONIX S.A.
www.imatronix.com

M=C3=B3vil : (09) 72 188 630

Santiago: (+56) (02) 28 99 44 60 + anexo 800
Valpara=C3=ADso: (+56) (32) 2 76 80 77 + anexo 800

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