From deepak.jagtap at maxta.com Tue Jun 6 03:31:30 2017 Content-Type: multipart/mixed; boundary="===============7796544765067303654==" MIME-Version: 1.0 From: Deepak Jagtap To: devel at ovirt.org Subject: [ovirt-devel] Snapshots & clone support from datastore Date: Tue, 06 Jun 2017 02:57:36 +0000 Message-ID: --===============7796544765067303654== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_MWHPR11MB166305908F1E2918F9B3FE4AEDCB0MWHPR11MB1663namp_ Content-Type: text/plain; charset=3D"iso-8859-1" Content-Transfer-Encoding: quoted-printable Hey Guys, I am newbie to ovirt, and wanted to confirm whats the best way to leverage = =3D snapshot, clone features provided by the datastore filesystem. I have a btrfs datastore exported and wanted use btrfs snapshots for vm sna= =3D pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= =3D filesystem? Thanks & Regards, Deepak --_000_MWHPR11MB166305908F1E2918F9B3FE4AEDCB0MWHPR11MB1663namp_ Content-Type: text/html; charset=3D"iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to levera= =3D ge snapshot, clone features 

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots fo= =3D r vm snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by = =3D the filesystem?


Thanks & Regards,

Deepak

 

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On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap wrote: > Hey Guys, > > > I am newbie to ovirt, and wanted to confirm whats the best way to leverage > snapshot, clone features > > provided by the datastore filesystem. > > I have a btrfs datastore exported and wanted use btrfs snapshots for vm > snapshot & clones. > > Does ovirt offers any hooks/APIs so that image snapshots are created by > the filesystem? > > > Thanks & Regards, > > Deepak > > > > _______________________________________________ > Devel mailing list > Devel(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/devel > --===============3766136035862255652== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+PGRpdiBjbGFzcz0iZ21haWxfZGVmYXVsdCIgc3R5bGU9ImZvbnQtZmFt aWx5Om1vbm9zcGFjZSxtb25vc3BhY2UiPlVuZm9ydHVuYXRlbHksIHRoZXJlJiMzOTtzIG5vIHN1 Y2ggaW50ZWdyYXRpb24gcG9pbnQgYXQgdGhlIG1vbWVudC48L2Rpdj48L2Rpdj48ZGl2IGNsYXNz PSJnbWFpbF9leHRyYSI+PGJyPjxkaXYgY2xhc3M9ImdtYWlsX3F1b3RlIj5PbiBUdWUsIEp1biA2 LCAyMDE3IGF0IDU6NTcgQU0sIERlZXBhayBKYWd0YXAgPHNwYW4gZGlyPSJsdHIiPiZsdDs8YSBo cmVmPSJtYWlsdG86ZGVlcGFrLmphZ3RhcEBtYXh0YS5jb20iIHRhcmdldD0iX2JsYW5rIj5kZWVw YWsuamFndGFwQG1heHRhLmNvbTwvYT4mZ3Q7PC9zcGFuPiB3cm90ZTo8YnI+PGJsb2NrcXVvdGUg Y2xhc3M9ImdtYWlsX3F1b3RlIiBzdHlsZT0ibWFyZ2luOjAgMCAwIC44ZXg7Ym9yZGVyLWxlZnQ6 MXB4ICNjY2Mgc29saWQ7cGFkZGluZy1sZWZ0OjFleCI+CgoKCgo8ZGl2IGRpcj0ibHRyIj4KPGRp diBpZD0ibV8tNDg3MzI0NjA5NTE3Mzk2ODIyNGRpdnRhZ2RlZmF1bHR3cmFwcGVyIiBzdHlsZT0i Zm9udC1zaXplOjEycHQ7Y29sb3I6IzAwMDAwMDtmb250LWZhbWlseTpDYWxpYnJpLEFyaWFsLEhl bHZldGljYSxzYW5zLXNlcmlmIiBkaXI9Imx0ciI+CjxwPkhleSBHdXlzLDwvcD4KPHA+PGJyPgo8 L3A+CjxwPkkgYW0gbmV3YmllIHRvIG92aXJ0LCBhbmQgd2FudGVkIHRvIGNvbmZpcm0gd2hhdHMg dGhlIGJlc3Qgd2F5IHRvIGxldmVyYWdlIHNuYXBzaG90LCBjbG9uZSBmZWF0dXJlc8KgPC9wPgo8 cD5wcm92aWRlZCBieSB0aGUgZGF0YXN0b3JlIGZpbGVzeXN0ZW0uPC9wPgo8cD5JIGhhdmUgYSBi dHJmcyBkYXRhc3RvcmUgZXhwb3J0ZWTCoGFuZCB3YW50ZWQgdXNlIGJ0cmZzIHNuYXBzaG90cyBm b3Igdm0gc25hcHNob3QgJmFtcDsgY2xvbmVzLjwvcD4KPHA+RG9lcyBvdmlydCBvZmZlcnMgYW55 IGhvb2tzL0FQSXMgc28gdGhhdCBpbWFnZSBzbmFwc2hvdHMgYXJlIGNyZWF0ZWQgYnkgdGhlIGZp bGVzeXN0ZW0/PC9wPgo8cD48YnI+CjwvcD4KPHA+VGhhbmtzICZhbXA7IFJlZ2FyZHMsPC9wPgo8 cD5EZWVwYWs8L3A+CjxwPsKgPC9wPgo8L2Rpdj4KPC9kaXY+Cgo8YnI+X19fX19fX19fX19fX19f X19fX19fX19fX19fX19fPHdicj5fX19fX19fX19fX19fX19fXzxicj4KRGV2ZWwgbWFpbGluZyBs aXN0PGJyPgo8YSBocmVmPSJtYWlsdG86RGV2ZWxAb3ZpcnQub3JnIj5EZXZlbEBvdmlydC5vcmc8 L2E+PGJyPgo8YSBocmVmPSJodHRwOi8vbGlzdHMub3ZpcnQub3JnL21haWxtYW4vbGlzdGluZm8v ZGV2ZWwiIHJlbD0ibm9yZWZlcnJlciIgdGFyZ2V0PSJfYmxhbmsiPmh0dHA6Ly9saXN0cy5vdmly dC5vcmcvPHdicj5tYWlsbWFuL2xpc3RpbmZvL2RldmVsPC9hPjxicj48L2Jsb2NrcXVvdGU+PC9k aXY+PGJyPjwvZGl2Pgo= --===============3766136035862255652==-- From deepak.jagtap at maxta.com Tue Jun 6 22:37:06 2017 Content-Type: multipart/mixed; boundary="===============9217416582561519642==" MIME-Version: 1.0 From: Deepak Jagtap To: devel at ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Date: Tue, 06 Jun 2017 22:37:03 +0000 Message-ID: In-Reply-To: CADgXf3yVV0LQya_V06mB1XuzwCnUnQR3cTq9mjbO_d====TcEQ@mail.gmail.com --===============9217416582561519642== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_DM5PR11MB1657164B114E44AEAF747A8EEDCB0DM5PR11MB1657namp_ Content-Type: text/plain; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable Thanks Allon! Best Regards, Deepak ________________________________ From: Allon Mureinik Sent: Tuesday, June 6, 2017 2:43:17 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Unfortunately, there's no such integration point at the moment. On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap > wrote: Hey Guys, I am newbie to ovirt, and wanted to confirm whats the best way to leverage = =3D snapshot, clone features provided by the datastore filesystem. I have a btrfs datastore exported and wanted use btrfs snapshots for vm sna= =3D pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= =3D filesystem? Thanks & Regards, Deepak _______________________________________________ Devel mailing list Devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/devel --_000_DM5PR11MB1657164B114E44AEAF747A8EEDCB0DM5PR11MB1657namp_ Content-Type: text/html; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable

Thanks Allon!


Best Regards,

Deepak

From: Allon Mureinik &l= t;am=3D ureini(a)redhat.com>
Sent: Tuesday, June 6, 2017 2:43:17 PM
To: Deepak Jagtap
Cc: devel(a)ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
= Unfo=3D rtunately, there's no such integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap = <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to levera= =3D ge snapshot, clone features 

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots fo= =3D r vm snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by = =3D the filesystem?


Thanks & Regards,

Deepak

 


_______________________________________________
Devel mailing list
Devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/devel<=3D br>

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--_000_MWHPR11MB1663F5706A4201A33C8C7759EDC50MWHPR11MB1663namp_ Content-Type: text/plain; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable Hi Allon, After going through current vdsm code base, noticed that after taking a sna= =3D pshot vm starts referring the newly created qcow image/volume. For internal snapshots which are not qcow is it configurable somehow so th= =3D at vm continues doing writes to same base image? Thanks & Regards, Deepak ________________________________ From: Deepak Jagtap Sent: Tuesday, June 6, 2017 3:37:03 PM To: Allon Mureinik Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Thanks Allon! Best Regards, Deepak ________________________________ From: Allon Mureinik Sent: Tuesday, June 6, 2017 2:43:17 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Unfortunately, there's no such integration point at the moment. On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap > wrote: Hey Guys, I am newbie to ovirt, and wanted to confirm whats the best way to leverage = =3D snapshot, clone features provided by the datastore filesystem. I have a btrfs datastore exported and wanted use btrfs snapshots for vm sna= =3D pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= =3D filesystem? Thanks & Regards, Deepak _______________________________________________ Devel mailing list Devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/devel --_000_MWHPR11MB1663F5706A4201A33C8C7759EDC50MWHPR11MB1663namp_ Content-Type: text/html; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Allon,


After going through current vdsm code base, noticed that after= =3D taking a snapshot vm starts referring the newly created qcow image/volume.= =3D

For internal snapshots which are not qcow  is it configurable = =3D somehow so that vm continues doing writes to same base image?


Thanks & Regards,

Deepak

From: Deepak Jagtap
Sent: Tuesday, June 6, 2017 3:37:03 PM
To: Allon Mureinik
Cc: devel(a)ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 

Thanks Allon!


Best Regards,

Deepak

From: Allon Mureinik &l= t;am=3D ureini(a)redhat.com>
Sent: Tuesday, June 6, 2017 2:43:17 PM
To: Deepak Jagtap
Cc: devel(a)ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
= Unfo=3D rtunately, there's no such integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap = <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to levera= =3D ge snapshot, clone features 

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots fo= =3D r vm snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by = =3D the filesystem?


Thanks & Regards,

Deepak

 


_______________________________________________
Devel mailing list
Devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/devel<=3D br>

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--===============4402631659953374590== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Not sure I understand the question. Could you give an example of what you mean perhpas? On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap wrote: > Hi Allon, > > > After going through current vdsm code base, noticed that after taking a > snapshot vm starts referring the newly created qcow image/volume. > > For internal snapshots which are not qcow is it configurable somehow so > that vm continues doing writes to same base image? > > > Thanks & Regards, > > Deepak > ------------------------------ > *From:* Deepak Jagtap > *Sent:* Tuesday, June 6, 2017 3:37:03 PM > *To:* Allon Mureinik > *Cc:* devel(a)ovirt.org > *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore > > > Thanks Allon! > > > Best Regards, > > Deepak > ------------------------------ > *From:* Allon Mureinik > *Sent:* Tuesday, June 6, 2017 2:43:17 PM > *To:* Deepak Jagtap > *Cc:* devel(a)ovirt.org > *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore > > Unfortunately, there's no such integration point at the moment. > > On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap > wrote: > >> Hey Guys, >> >> >> I am newbie to ovirt, and wanted to confirm whats the best way to >> leverage snapshot, clone features >> >> provided by the datastore filesystem. >> >> I have a btrfs datastore exported and wanted use btrfs snapshots for vm >> snapshot & clones. >> >> Does ovirt offers any hooks/APIs so that image snapshots are created by >> the filesystem? >> >> >> Thanks & Regards, >> >> Deepak >> >> >> >> _______________________________________________ >> Devel mailing list >> Devel(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/devel >> > > --===============4402631659953374590== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+PGRpdiBjbGFzcz0iZ21haWxfZGVmYXVsdCIgc3R5bGU9ImZvbnQtZmFt aWx5Om1vbm9zcGFjZSxtb25vc3BhY2UiPk5vdCBzdXJlIEkgdW5kZXJzdGFuZCB0aGUgcXVlc3Rp b24uIENvdWxkIHlvdSBnaXZlIGFuIGV4YW1wbGXCoG9mIHdoYXQgeW91IG1lYW4gcGVyaHBhcz88 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Pjxicj48L2Rpdj4K --===============4402631659953374590==-- From deepak.jagtap at maxta.com Wed Jun 21 20:02:39 2017 Content-Type: multipart/mixed; boundary="===============3496073040068719392==" MIME-Version: 1.0 From: Deepak Jagtap To: devel at ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Date: Wed, 21 Jun 2017 19:28:44 +0000 Message-ID: In-Reply-To: CADgXf3z3bBmDuWWJUpOJTYZ_tdk+0DmGP15qPEq5O3e=7Y30TA@mail.gmail.com --===============3496073040068719392== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_MWHPR11MB1663D3BF9B01DB6E1142AB1DEDDA0MWHPR11MB1663namp_ Content-Type: text/plain; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable Hi Allon, I am trying to leverage snapshot capability of underlying filesystem. As per my understanding current snapshot works like this: Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm sta= =3D rts writing on newly created qcow image. So in this case vm is going to do all new writes on snap2(qcow) voulme and = =3D will redirect read IOs to snap1 & Base image as required. But in my case snapshots created by the filesystem are read only and it's i= =3D n raw format. As a result after creating snapshot vm disk configuration won't change afte= =3D r taking snapshot but will continue doing writes on same base image. So snapshots will look like this: Base Image(raw)--->snap1(raw)->snap2(raw) Base Image will always remain writable, while the snapshots will remain rea= =3D d only raw format. Just wanted to confirm is this configurable so that vm continues referring= =3D base image after the snapshot instead of newly created qcow image? Thanks & Regards, Deepak ________________________________ From: Allon Mureinik Sent: Tuesday, June 20, 2017 7:59:03 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Not sure I understand the question. Could you give an example of what you m= =3D ean perhpas? On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap > wrote: Hi Allon, After going through current vdsm code base, noticed that after taking a sna= =3D pshot vm starts referring the newly created qcow image/volume. For internal snapshots which are not qcow is it configurable somehow so th= =3D at vm continues doing writes to same base image? Thanks & Regards, Deepak ________________________________ From: Deepak Jagtap Sent: Tuesday, June 6, 2017 3:37:03 PM To: Allon Mureinik Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Thanks Allon! Best Regards, Deepak ________________________________ From: Allon Mureinik > Sent: Tuesday, June 6, 2017 2:43:17 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Unfortunately, there's no such integration point at the moment. On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap > wrote: Hey Guys, I am newbie to ovirt, and wanted to confirm whats the best way to leverage = =3D snapshot, clone features provided by the datastore filesystem. I have a btrfs datastore exported and wanted use btrfs snapshots for vm sna= =3D pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= =3D filesystem? Thanks & Regards, Deepak _______________________________________________ Devel mailing list Devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/devel --_000_MWHPR11MB1663D3BF9B01DB6E1142AB1DEDDA0MWHPR11MB1663namp_ Content-Type: text/html; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Allon,


I am trying to leverage snapshot  capability of underlying fil= =3D esystem.

As per my understanding current snaps= ho=3D t works like this:

Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each s= =3D napshot vm starts writing on newly created qcow image.

So in this case vm is going to do all new writes on snap2(qcow) voulme a= =3D nd will redirect read IOs to snap1 & Base image as required.


But in my case snapshots created by the filesystem are read only and it'= =3D s in raw format.

As a result after creating snapshot vm disk configuration won't change a= =3D fter taking snapshot but will continue doing writes on same base image.

So snapshots will look like this:

Base Image(raw)--->snap1(raw)->snap2(raw)

Base Image will always remain writable, while the s= =3D napshots will remain read only raw format.


Just wanted to confirm is this configurable so that vm continues  r= =3D eferring base image after the snapshot instead of newly created qcow image?= =3D


Thanks & Regards,

Deepak




 

From: Allon Mureinik &l= t;am=3D ureini(a)redhat.com>
Sent: Tuesday, June 20, 2017 7:59:03 PM
To: Deepak Jagtap
Cc: devel(a)ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
= Not =3D sure I understand the question. Could you give an example of what you = =3D mean perhpas?

On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagta= p =3D <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hi Allon,


After going through current vdsm code base, noticed that after= =3D taking a snapshot vm starts referring the newly created qcow image/volume.= =3D

For internal snapshots which are not qcow  is it configurable = =3D somehow so that vm continues doing writes to same base image?


Thanks & Regards,

Deepak

From:<= /b> =3D Deepak Jagtap
Sent: Tuesday, June 6, 2017 3:37:03 PM
To: Allon Mureinik
Cc: devel= (a)ovirt=3D .org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 

Thanks Allon!


Best Regards,

Deepak

From:<= /b> =3D Allon Mureinik <amureini(a)redhat.com>
Sent: Tuesday, June 6, 2017 2:43:17 PM
To: Deepak Jagtap
Cc: devel= (a)ovirt=3D .org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
= Unfo=3D rtunately, there's no such integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap = <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to levera= =3D ge snapshot, clone features 

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots fo= =3D r vm snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by = =3D the filesystem?


Thanks & Regards,

Deepak

 


_______________________________________________
Devel mailing list
Devel(a)ovirt.or= g http://lists.ovirt.org/mailman/listinfo/devel<=3D br>


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from datastore Date: Wed, 21 Jun 2017 23:47:26 +0300 Message-ID: In-Reply-To: MWHPR11MB1663D3BF9B01DB6E1142AB1DEDDA0@MWHPR11MB1663.namprd11.prod.outlook.com --===============4333150082228740033== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap wrote: > Hi Allon, > > > I am trying to leverage snapshot capability of underlying filesystem. > > As per my understanding current snapshot works like this: > > Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm > starts writing on newly created qcow image. > > So in this case vm is going to do all new writes on snap2(qcow) voulme and > will redirect read IOs to snap1 & Base image as required. > > > But in my case snapshots created by the filesystem are read only and it's > in raw format. > > As a result after creating snapshot vm disk configuration won't change > after taking snapshot but will continue doing writes on same base image. > > So snapshots will look like this: > > Base Image(raw)--->snap1(raw)->snap2(raw) > > Base Image will always remain writable, while the snapshots will remain > read only raw format. > > > Just wanted to confirm is this configurable so that vm continues > referring base image after the snapshot instead of newly created qcow > image? > It is not. It'll need code modification to allow externally taking snapshots of VM disks. Y. > > Thanks & Regards, > > Deepak > > > > > > ------------------------------ > *From:* Allon Mureinik > *Sent:* Tuesday, June 20, 2017 7:59:03 PM > > *To:* Deepak Jagtap > *Cc:* devel(a)ovirt.org > *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore > > Not sure I understand the question. Could you give an example of what you > mean perhpas? > > On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap > wrote: > >> Hi Allon, >> >> >> After going through current vdsm code base, noticed that after taking a >> snapshot vm starts referring the newly created qcow image/volume. >> >> For internal snapshots which are not qcow is it configurable somehow so >> that vm continues doing writes to same base image? >> >> >> Thanks & Regards, >> >> Deepak >> ------------------------------ >> *From:* Deepak Jagtap >> *Sent:* Tuesday, June 6, 2017 3:37:03 PM >> *To:* Allon Mureinik >> *Cc:* devel(a)ovirt.org >> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >> >> >> Thanks Allon! >> >> >> Best Regards, >> >> Deepak >> ------------------------------ >> *From:* Allon Mureinik >> *Sent:* Tuesday, June 6, 2017 2:43:17 PM >> *To:* Deepak Jagtap >> *Cc:* devel(a)ovirt.org >> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >> >> Unfortunately, there's no such integration point at the moment. >> >> On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap >> wrote: >> >>> Hey Guys, >>> >>> >>> I am newbie to ovirt, and wanted to confirm whats the best way to >>> leverage snapshot, clone features >>> >>> provided by the datastore filesystem. >>> >>> I have a btrfs datastore exported and wanted use btrfs snapshots for vm >>> snapshot & clones. >>> >>> Does ovirt offers any hooks/APIs so that image snapshots are created by >>> the filesystem? >>> >>> >>> Thanks & Regards, >>> >>> Deepak >>> >>> >>> >>> _______________________________________________ >>> Devel mailing list >>> Devel(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/devel >>> >> >> > > _______________________________________________ > Devel mailing list > Devel(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/devel > --===============4333150082228740033== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; 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--===============4333150082228740033==-- From deepak.jagtap at maxta.com Wed Jun 21 20:57:07 2017 Content-Type: multipart/mixed; boundary="===============2804472995247618556==" MIME-Version: 1.0 From: Deepak Jagtap To: devel at ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Date: Wed, 21 Jun 2017 20:57:04 +0000 Message-ID: In-Reply-To: CAJgorsbxeG8uoVwVSVCkjuKB6ij_zVwgNTvFR81H6UK8p7xu3w@mail.gmail.com --===============2804472995247618556== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_MWHPR11MB1663B80CFB0DAD1AD0B0C09CEDDA0MWHPR11MB1663namp_ Content-Type: text/plain; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable Thanks Yaniv! ________________________________ From: Yaniv Kaul Sent: Wednesday, June 21, 2017 1:47:26 PM To: Deepak Jagtap Cc: Allon Mureinik; devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap > wrote: Hi Allon, I am trying to leverage snapshot capability of underlying filesystem. As per my understanding current snapshot works like this: Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm sta= =3D rts writing on newly created qcow image. So in this case vm is going to do all new writes on snap2(qcow) voulme and = =3D will redirect read IOs to snap1 & Base image as required. But in my case snapshots created by the filesystem are read only and it's i= =3D n raw format. As a result after creating snapshot vm disk configuration won't change afte= =3D r taking snapshot but will continue doing writes on same base image. So snapshots will look like this: Base Image(raw)--->snap1(raw)->snap2(raw) Base Image will always remain writable, while the snapshots will remain rea= =3D d only raw format. Just wanted to confirm is this configurable so that vm continues referring= =3D base image after the snapshot instead of newly created qcow image? It is not. It'll need code modification to allow externally taking snapshot= =3D s of VM disks. Y. Thanks & Regards, Deepak ________________________________ From: Allon Mureinik > Sent: Tuesday, June 20, 2017 7:59:03 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Not sure I understand the question. Could you give an example of what you m= =3D ean perhpas? On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap > wrote: Hi Allon, After going through current vdsm code base, noticed that after taking a sna= =3D pshot vm starts referring the newly created qcow image/volume. For internal snapshots which are not qcow is it configurable somehow so th= =3D at vm continues doing writes to same base image? Thanks & Regards, Deepak ________________________________ From: Deepak Jagtap Sent: Tuesday, June 6, 2017 3:37:03 PM To: Allon Mureinik Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Thanks Allon! Best Regards, Deepak ________________________________ From: Allon Mureinik > Sent: Tuesday, June 6, 2017 2:43:17 PM To: Deepak Jagtap Cc: devel(a)ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Unfortunately, there's no such integration point at the moment. On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap > wrote: Hey Guys, I am newbie to ovirt, and wanted to confirm whats the best way to leverage = =3D snapshot, clone features provided by the datastore filesystem. I have a btrfs datastore exported and wanted use btrfs snapshots for vm sna= =3D pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= =3D filesystem? Thanks & Regards, Deepak _______________________________________________ Devel mailing list Devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/devel _______________________________________________ Devel mailing list Devel(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/devel --_000_MWHPR11MB1663B80CFB0DAD1AD0B0C09CEDDA0MWHPR11MB1663namp_ Content-Type: text/html; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable

Thanks Yaniv!

From: Yaniv Kaul <yk= aul@=3D redhat.com>
Sent: Wednesday, June 21, 2017 1:47:26 PM
To: Deepak Jagtap
Cc: Allon Mureinik; devel(a)ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 


On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagta= p =3D <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hi Allon,


I am trying to leverage snapshot  capability of underlying fil= =3D esystem.

As per my understanding current snapsho= t&=3D nbsp;works like this:

Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after e= =3D ach snapshot vm starts writing on newly created qcow image.

So in this case vm is going to do all new writes on snap2(qcow) voulme a= =3D nd will redirect read IOs to snap1 & Base image as required.


But in my case snapshots created by the filesystem are read only and it'= =3D s in raw format.

As a result after creating snapshot vm disk configuration won't change a= =3D fter taking snapshot but will continue doing writes on same base image.

So snapshots will look like this:

Base Image(raw)--->snap1(raw)->snap2(raw)

Base Image will always remain writable, while the snapshots will = =3D remain read only raw format.


Just wanted to confirm is this configurable so that vm continues  r= =3D eferring base image after the snapshot instead of newly created qcow image?= =3D


It is not. It'll need code modification to allow externally taking sna= =3D pshots of VM disks.
Y.
 


Thanks & Regards,

Deepak




 

From:= =3D Allon Mureinik <amureini(a)redhat.com>
Sent: Tuesday, June 20, 2017 7:59:03 PM

To: Deepak Jagtap
Cc: devel= (a)ovirt=3D .org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
Not sure I understand the = qu=3D estion. Could you give an example of what you mean perhpas?

On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagta= p =3D <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hi Allon,


After going through current vdsm code base, noticed that after= =3D taking a snapshot vm starts referring the newly created qcow image/volume.= =3D

For internal snapshots which are not qcow  is it configurable = =3D somehow so that vm continues doing writes to same base image?


Thanks & Regards,

Deepak

From: Deepak Jagtap
Sent: Tuesday, June 6, 2017 3:37:03 PM
To: Allon Mureinik
Cc: devel= (a)ovirt=3D .org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 

Thanks Allon!


Best Regards,

Deepak

From: Allon Mureinik <amureini(a)redhat.com>
Sent: Tuesday, June 6, 2017 2:43:17 PM
To: Deepak Jagtap
Cc: devel= (a)ovirt=3D .org
Subject: Re: [ovirt-devel] Snapshots & clone support from datast= =3D ore
 
Unfortunately, there's no = su=3D ch integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap = <deep= ak.jag=3D tap(a)maxta.com> wrote:

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to levera= =3D ge snapshot, clone features 

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots fo= =3D r vm snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by = =3D the filesystem?


Thanks & Regards,

Deepak

 


_______________________________________________
Devel mailing list
Devel(a)ovirt.or= g http://lists.ovirt.org/mailman/listinfo/devel<=3D br>



_______________________________________________
Devel mailing list
Devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/devel<=3D br>

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look at the libfgapi patches as the are the first to externalize the snapshot process to separate implementation. Thanks, YANIV LAVI (YANIV DARY) SENIOR TECHNICAL PRODUCT MANAGER Red Hat Israel Ltd. 34 Jerusalem Road, Building A, 1st floor Ra'anana, Israel 4350109 ylavi(a)redhat.com T: +972-9-7692306/8272306 F: +972-9-7692223 IM= : ylavi TRIED. TESTED. TRUSTED. @redhatnews Red Hat Red Hat On Wed, Jun 21, 2017 at 11:57 PM, Deepak Jagtap wrote: > Thanks Yaniv! > ------------------------------ > *From:* Yaniv Kaul > *Sent:* Wednesday, June 21, 2017 1:47:26 PM > *To:* Deepak Jagtap > *Cc:* Allon Mureinik; devel(a)ovirt.org > > *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore > > > > On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap > wrote: > >> Hi Allon, >> >> >> I am trying to leverage snapshot capability of underlying filesystem. >> >> As per my understanding current snapshot works like this: >> >> Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm >> starts writing on newly created qcow image. >> >> So in this case vm is going to do all new writes on snap2(qcow) voulme >> and will redirect read IOs to snap1 & Base image as required. >> >> >> But in my case snapshots created by the filesystem are read only and it's >> in raw format. >> >> As a result after creating snapshot vm disk configuration won't change >> after taking snapshot but will continue doing writes on same base image. >> >> So snapshots will look like this: >> >> Base Image(raw)--->snap1(raw)->snap2(raw) >> >> Base Image will always remain writable, while the snapshots will remain >> read only raw format. >> >> >> Just wanted to confirm is this configurable so that vm continues >> referring base image after the snapshot instead of newly created qcow >> image? >> > > It is not. It'll need code modification to allow externally taking > snapshots of VM disks. > Y. > > >> >> Thanks & Regards, >> >> Deepak >> >> >> >> >> >> ------------------------------ >> *From:* Allon Mureinik >> *Sent:* Tuesday, June 20, 2017 7:59:03 PM >> >> *To:* Deepak Jagtap >> *Cc:* devel(a)ovirt.org >> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >> >> Not sure I understand the question. Could you give an example of what you >> mean perhpas? >> >> On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap >> wrote: >> >>> Hi Allon, >>> >>> >>> After going through current vdsm code base, noticed that after taking a >>> snapshot vm starts referring the newly created qcow image/volume. >>> >>> For internal snapshots which are not qcow is it configurable somehow so >>> that vm continues doing writes to same base image? >>> >>> >>> Thanks & Regards, >>> >>> Deepak >>> ------------------------------ >>> *From:* Deepak Jagtap >>> *Sent:* Tuesday, June 6, 2017 3:37:03 PM >>> *To:* Allon Mureinik >>> *Cc:* devel(a)ovirt.org >>> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >>> >>> >>> Thanks Allon! >>> >>> >>> Best Regards, >>> >>> Deepak >>> ------------------------------ >>> *From:* Allon Mureinik >>> *Sent:* Tuesday, June 6, 2017 2:43:17 PM >>> *To:* Deepak Jagtap >>> *Cc:* devel(a)ovirt.org >>> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >>> >>> Unfortunately, there's no such integration point at the moment. >>> >>> On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap >>> wrote: >>> >>>> Hey Guys, >>>> >>>> >>>> I am newbie to ovirt, and wanted to confirm whats the best way to >>>> leverage snapshot, clone features >>>> >>>> provided by the datastore filesystem. >>>> >>>> I have a btrfs datastore exported and wanted use btrfs snapshots for vm >>>> snapshot & clones. >>>> >>>> Does ovirt offers any hooks/APIs so that image snapshots are created by >>>> the filesystem? >>>> >>>> >>>> Thanks & Regards, >>>> >>>> Deepak >>>> >>>> >>>> >>>> _______________________________________________ >>>> Devel mailing list >>>> Devel(a)ovirt.org >>>> http://lists.ovirt.org/mailman/listinfo/devel >>>> >>> >>> >> >> _______________________________________________ >> Devel mailing list >> Devel(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/devel >> > > > _______________________________________________ > Devel mailing list > 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multipart/mixed; boundary="===============1588635176259760506==" MIME-Version: 1.0 From: Nir Soffer To: devel at ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Date: Thu, 22 Jun 2017 13:20:13 +0000 Message-ID: In-Reply-To: CACKMAy-B_CG=XLVYpQ2fCWs11st_jkJuxTdgMAFx4_OOT=7GJg@mail.gmail.com --===============1588635176259760506== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Jun 22, 2017 at 3:39 PM Yaniv Lavi (Dary) wrot= e: > Hi, > You can have a look at the libfgapi patches as the are the first to > externalize the snapshot process to separate implementation. > Snapshots in libgfapi are not using any external process. The only difference is modifying the volume from file path (/rhev/data-center/mnt/server:path/sd_id/images/img_id/vol_id) to gluster path (volume/sd_id/images/img_id/vol_id). This modification is done when we prepare a volume. This is basically a hack since gluster connections are not managed properly in engine like other types of storage. Nir > > > Thanks, > > YANIV LAVI (YANIV DARY) > > SENIOR TECHNICAL PRODUCT MANAGER > > Red Hat Israel Ltd. > > 34 Jerusalem Road, Building A, 1st floor > > Ra'anana, Israel 4350109 > > ylavi(a)redhat.com T: +972-9-7692306/8272306 F: +972-9-7692223 = IM: ylavi > TRIED. TESTED. TRUSTED. > @redhatnews Red Hat Red Hat > > > On Wed, Jun 21, 2017 at 11:57 PM, Deepak Jagtap > wrote: > >> Thanks Yaniv! >> ------------------------------ >> *From:* Yaniv Kaul >> *Sent:* Wednesday, June 21, 2017 1:47:26 PM >> *To:* Deepak Jagtap >> *Cc:* Allon Mureinik; devel(a)ovirt.org >> >> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >> >> >> >> On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap >> wrote: >> >>> Hi Allon, >>> >>> >>> I am trying to leverage snapshot capability of underlying filesystem. >>> >>> As per my understanding current snapshot works like this: >>> >>> Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm >>> starts writing on newly created qcow image. >>> >>> So in this case vm is going to do all new writes on snap2(qcow) voulme >>> and will redirect read IOs to snap1 & Base image as required. >>> >>> >>> But in my case snapshots created by the filesystem are read only and >>> it's in raw format. >>> >>> As a result after creating snapshot vm disk configuration won't change >>> after taking snapshot but will continue doing writes on same base image. >>> >>> So snapshots will look like this: >>> >>> Base Image(raw)--->snap1(raw)->snap2(raw) >>> >>> Base Image will always remain writable, while the snapshots will remain >>> read only raw format. >>> >>> >>> Just wanted to confirm is this configurable so that vm continues >>> referring base image after the snapshot instead of newly created qcow >>> image? >>> >> >> It is not. It'll need code modification to allow externally taking >> snapshots of VM disks. >> Y. >> >> >>> >>> Thanks & Regards, >>> >>> Deepak >>> >>> >>> >>> >>> >>> ------------------------------ >>> *From:* Allon Mureinik >>> *Sent:* Tuesday, June 20, 2017 7:59:03 PM >>> >>> *To:* Deepak Jagtap >>> *Cc:* devel(a)ovirt.org >>> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >>> >>> Not sure I understand the question. Could you give an example of what >>> you mean perhpas? >>> >>> On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap >> > wrote: >>> >>>> Hi Allon, >>>> >>>> >>>> After going through current vdsm code base, noticed that after taking a >>>> snapshot vm starts referring the newly created qcow image/volume. >>>> >>>> For internal snapshots which are not qcow is it configurable >>>> somehow so that vm continues doing writes to same base image? >>>> >>>> >>>> Thanks & Regards, >>>> >>>> Deepak >>>> ------------------------------ >>>> *From:* Deepak Jagtap >>>> *Sent:* Tuesday, June 6, 2017 3:37:03 PM >>>> *To:* Allon Mureinik >>>> *Cc:* devel(a)ovirt.org >>>> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >>>> >>>> >>>> Thanks Allon! >>>> >>>> >>>> Best Regards, >>>> >>>> Deepak >>>> ------------------------------ >>>> *From:* Allon Mureinik >>>> *Sent:* Tuesday, June 6, 2017 2:43:17 PM >>>> *To:* Deepak Jagtap >>>> *Cc:* devel(a)ovirt.org >>>> *Subject:* Re: [ovirt-devel] Snapshots & clone support from datastore >>>> >>>> Unfortunately, there's no such integration point at the moment. >>>> >>>> On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap >>>> wrote: >>>> >>>>> Hey Guys, >>>>> >>>>> >>>>> I am newbie to ovirt, and wanted to confirm whats the best way to >>>>> leverage snapshot, clone features >>>>> >>>>> provided by the datastore filesystem. >>>>> >>>>> I have a btrfs datastore exported and wanted use btrfs snapshots for >>>>> vm snapshot & clones. >>>>> >>>>> Does ovirt offers any hooks/APIs so that image snapshots are created >>>>> by the filesystem? >>>>> >>>>> >>>>> Thanks & Regards, >>>>> >>>>> Deepak >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Devel mailing list >>>>> Devel(a)ovirt.org >>>>> http://lists.ovirt.org/mailman/listinfo/devel >>>>> >>>> >>>> >>> >>> _______________________________________________ >>> Devel mailing list >>> Devel(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/devel >>> >> >> >> _______________________________________________ >> Devel mailing list >> Devel(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/devel >> > > _______________________________________________ > Devel mailing list > Devel(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/devel --===============1588635176259760506== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+PGRpdiBjbGFzcz0iZ21haWxfcXVvdGUiPjxkaXYgZGlyPSJsdHIiPk9u IFRodSwgSnVuIDIyLCAyMDE3IGF0IDM6MzkgUE0gWWFuaXYgTGF2aSAoRGFyeSkgJmx0OzxhIGhy ZWY9Im1haWx0bzp5bGF2aUByZWRoYXQuY29tIj55bGF2aUByZWRoYXQuY29tPC9hPiZndDsgd3Jv dGU6PGJyPjwvZGl2PjxibG9ja3F1b3RlIGNsYXNzPSJnbWFpbF9xdW90ZSIgc3R5bGU9Im1hcmdp bjowIDAgMCAuOGV4O2JvcmRlci1sZWZ0OjFweCAjY2NjIHNvbGlkO3BhZGRpbmctbGVmdDoxZXgi PjxkaXYgZGlyPSJsdHIiPkhpLDxkaXY+WW91IGNhbiBoYXZlIGEgbG9vayBhdCB0aGUgbGliZmdh cGnCoHBhdGNoZXMgYXMgdGhlIGFyZSB0aGUgZmlyc3QgdG8gZXh0ZXJuYWxpemUgdGhlIHNuYXBz 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> Base Image(raw)--->snap1(qcow)->snap2(qcow), i.e after each snapshot vm > starts writing on newly created qcow image. > > So in this case vm is going to do all new writes on snap2(qcow) voulme and > will redirect read IOs to snap1 & Base image as required. > Right But in my case snapshots created by the filesystem are read only and it's > in raw format. > > As a result after creating snapshot vm disk configuration won't change > after taking snapshot but will continue doing writes on same base image. > > So snapshots will look like this: > > Base Image(raw)--->snap1(raw)->snap2(raw) > Not sure what is snap1 and snap2 - how do you create and use them with your file system? what is the underlying file system? > Base Image will always remain writable, while the snapshots will remain > read only raw format. > This works like ceph volumes. Our flow for ceph is: 1. engine invokes VM.freeze vdsm api to ensure that guest file systems are consistent 2. engine create new snapshot via cinder api 3. engine may invokes VM.snapshot vdsm api (without the ceph disk) if memory snapshot is needed. memory snapshot is stored in a new disk created by engine before this flow 4. engine invokes VM.thaw to unfreeze guest file systems > Just wanted to confirm is this configurable so that vm continues > referring base image after the snapshot instead of newly created qcow > image? > No, it will use new image, this is not possible with snapshot. Vdsm has the basic building blocks to do what you need, except creating and deleting snapshots. To implement such feature you need to add a new type of storage in engine that will call the right vdsm apis when creating and deleting snapshots, and new vdsm apis to create and delete snapshots. 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