--_000_MWHPR11MB1663B80CFB0DAD1AD0B0C09CEDDA0MWHPR11MB1663namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Thanks Yaniv! ________________________________ From: Yaniv Kaul <ykaul@redhat.com> Sent: Wednesday, June 21, 2017 1:47:26 PM To: Deepak Jagtap Cc: Allon Mureinik; devel@ovirt.org Subject: Re: [ovirt-devel] Snapshots & clone support from datastore On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap <deepak.jagtap@maxta.com<ma= ilto:deepak.jagtap@maxta.com>> 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= rts 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 i= n raw format. As a result after creating snapshot vm disk configuration won't change afte= 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= d 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 snapshot= s of VM disks. Y. Thanks & Regards, Deepak ________________________________ From: Allon Mureinik <amureini@redhat.com<mailto:amureini@redhat.com>> Sent: Tuesday, June 20, 2017 7:59:03 PM To: Deepak Jagtap Cc: devel@ovirt.org<mailto:devel@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= ean perhpas? On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap <deepak.jagtap@maxta.com<ma= ilto:deepak.jagtap@maxta.com>> wrote: Hi Allon, After going through current vdsm code base, noticed that after taking a sna= pshot vm starts referring the newly created qcow image/volume. For internal snapshots which are not qcow is it configurable somehow so th= 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@ovirt.org<mailto:devel@ovirt.org> Subject: Re: [ovirt-devel] Snapshots & clone support from datastore Thanks Allon! Best Regards, Deepak ________________________________ From: Allon Mureinik <amureini@redhat.com<mailto:amureini@redhat.com>> Sent: Tuesday, June 6, 2017 2:43:17 PM To: Deepak Jagtap Cc: devel@ovirt.org<mailto:devel@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 <deepak.jagtap@maxta.com<mail= to:deepak.jagtap@maxta.com>> 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 sna= pshot & clones. Does ovirt offers any hooks/APIs so that image snapshots are created by the= filesystem? Thanks & Regards, Deepak _______________________________________________ Devel mailing list Devel@ovirt.org<mailto:Devel@ovirt.org> http://lists.ovirt.org/mailman/listinfo/devel _______________________________________________ Devel mailing list Devel@ovirt.org<mailto:Devel@ovirt.org> http://lists.ovirt.org/mailman/listinfo/devel --_000_MWHPR11MB1663B80CFB0DAD1AD0B0C09CEDDA0MWHPR11MB1663namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
</head> <body> <style type=3D"text/css" style=3D"display:none;"><!-- P {margin-top:0;margi= n-bottom:0;} --></style> <div id=3D"divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;font= -family:Calibri,Arial,Helvetica,sans-serif;" dir=3D"ltr"> <p>Thanks Yaniv!</p> </div> <hr style=3D"display:inline-block;width:98%" tabindex=3D"-1"> <div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st= yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Yaniv Kaul <ykaul@= redhat.com><br> <b>Sent:</b> Wednesday, June 21, 2017 1:47:26 PM<br> <b>To:</b> Deepak Jagtap<br> <b>Cc:</b> Allon Mureinik; devel@ovirt.org<br> <b>Subject:</b> Re: [ovirt-devel] Snapshots & clone support from datast= ore</font> <div> </div> </div> <div> <div dir=3D"ltr"><br> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">On Wed, Jun 21, 2017 at 10:28 PM, Deepak Jagtap = <span dir=3D"ltr"> <<a href=3D"mailto:deepak.jagtap@maxta.com" target=3D"_blank">deepak.jag= tap@maxta.com</a>></span> wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> <div> <div id=3D"m_-9072135902178749810divtagdefaultwrapper" style=3D"font-size:1= 2pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif" dir=3D"lt= r"> <p>Hi Allon,</p> <p><br> </p> <p>I am trying to leverage snapshot capability of underlying fil= esystem.</p> <p><span style=3D"font-size:12pt">As per my understanding current snapshot&= nbsp;</span><span style=3D"font-size:12pt"></span><span style=3D"font-size:= 12pt">works like this:</span></p> <p>Base Image(raw)--->snap1(qcow)-><wbr>snap2(qcow), i.e after e= ach snapshot vm starts writing on newly created qcow image.</p> <p>So in this case vm is going to do all new writes on snap2(qcow) voulme a= nd will redirect read IOs to snap1 & Base image as required.</p> <p><br> </p> <p>But in my case snapshots created by the filesystem are read only and it'= s in raw format.</p> <p>As a result after creating snapshot vm disk configuration won't change a= fter taking snapshot but will continue doing writes on same base image.</p> <p>So snapshots will look like this:</p> <p><span style=3D"font-family:Calibri,Arial,Helvetica,sans-serif,EmojiFont,= "Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,&qu= ot;Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:1= 6px">Base Image(raw)--->snap1(raw)-><wbr>snap2(raw)</span><br> </p> <p><span style=3D"font-family:Calibri,Arial,Helvetica,sans-serif,EmojiFont,= "Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,&qu= ot;Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:1= 6px">Base Image will always remain writable, while the snapshots will = remain read only raw format.</span></p> <p><br> </p> <p>Just wanted to confirm is this configurable so that vm continues r= eferring base image after the snapshot instead of newly created qcow image?= </p> </div> </div> </blockquote> <div><br> </div> <div>It is not. It'll need code modification to allow externally taking sna= pshots of VM disks.</div> <div>Y.</div> <div> </div> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> <div> <div id=3D"m_-9072135902178749810divtagdefaultwrapper" style=3D"font-size:1= 2pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif" dir=3D"lt= r"> <p><br> </p> <p>Thanks & Regards,</p> <p>Deepak</p> <p><span style=3D"font-family:Calibri,Arial,Helvetica,sans-serif,EmojiFont,= "Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,&qu= ot;Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:1= 6px"><br> </span></p> <p><span style=3D"font-family:Calibri,Arial,Helvetica,sans-serif,EmojiFont,= "Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,&qu= ot;Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:1= 6px"><br> </span></p> <p><br> </p> <p> </p> </div> <hr style=3D"display:inline-block;width:98%"> <div id=3D"m_-9072135902178749810divRplyFwdMsg" dir=3D"ltr"><font face=3D"C= alibri, sans-serif" style=3D"font-size:11pt" color=3D"#000000"><b>From:</b>= Allon Mureinik <<a href=3D"mailto:amureini@redhat.com" target=3D"_blank= ">amureini@redhat.com</a>><br> <b>Sent:</b> Tuesday, June 20, 2017 7:59:03 PM <div> <div class=3D"h5"><br> <b>To:</b> Deepak Jagtap<br> <b>Cc:</b> <a href=3D"mailto:devel@ovirt.org" target=3D"_blank">devel@ovirt= .org</a><br> <b>Subject:</b> Re: [ovirt-devel] Snapshots & clone support from datast= ore</div> </div> </font> <div> </div> </div> <div> <div class=3D"h5"> <div> <div dir=3D"ltr"> <div style=3D"font-family:monospace,monospace">Not sure I understand the qu= estion. Could you give an example of what you mean perhpas?</div> </div> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">On Tue, Jun 20, 2017 at 10:01 PM, Deepak Jagtap = <span dir=3D"ltr"> <<a href=3D"mailto:deepak.jagtap@maxta.com" target=3D"_blank">deepak.jag= tap@maxta.com</a>></span> wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> <div> <div id=3D"m_-9072135902178749810m_5891938740723837127divtagdefaultwrapper"= style=3D"font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,= sans-serif" dir=3D"ltr"> <p>Hi Allon,</p> <p><br> </p> <p>After going through current vdsm code base, noticed that after= taking a snapshot vm starts referring the newly created qcow image/volume.= </p> <p>For internal snapshots which are not qcow is it configurable = somehow so that vm continues doing writes to same base image?</p> <p><br> </p> <p>Thanks & Regards,</p> <p>Deepak</p> </div> <hr style=3D"display:inline-block;width:98%"> <div id=3D"m_-9072135902178749810m_5891938740723837127divRplyFwdMsg" dir=3D= "ltr"><font face=3D"Calibri, sans-serif" style=3D"font-size:11pt" color=3D"= #000000"><b>From:</b> Deepak Jagtap<br> <b>Sent:</b> Tuesday, June 6, 2017 3:37:03 PM<br> <b>To:</b> Allon Mureinik<span><br> <b>Cc:</b> <a href=3D"mailto:devel@ovirt.org" target=3D"_blank">devel@ovirt= .org</a><br> <b>Subject:</b> Re: [ovirt-devel] Snapshots & clone support from datast= ore</span></font> <div> </div> </div> <span> <div> <div id=3D"m_-9072135902178749810m_5891938740723837127divtagdefaultwrapper"= style=3D"font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,= sans-serif" dir=3D"ltr"> <p>Thanks Allon!</p> <p><br> </p> <p>Best Regards,</p> <p>Deepak</p> </div> <hr style=3D"display:inline-block;width:98%"> <div id=3D"m_-9072135902178749810m_5891938740723837127divRplyFwdMsg" dir=3D= "ltr"><font face=3D"Calibri, sans-serif" style=3D"font-size:11pt" color=3D"= #000000"><b>From:</b> Allon Mureinik <<a href=3D"mailto:amureini@redhat.= com" target=3D"_blank">amureini@redhat.com</a>><br> <b>Sent:</b> Tuesday, June 6, 2017 2:43:17 PM<br> <b>To:</b> Deepak Jagtap<br> <b>Cc:</b> <a href=3D"mailto:devel@ovirt.org" target=3D"_blank">devel@ovirt= .org</a><br> <b>Subject:</b> Re: [ovirt-devel] Snapshots & clone support from datast= ore</font> <div> </div> </div> <div> <div dir=3D"ltr"> <div style=3D"font-family:monospace,monospace">Unfortunately, there's no su= ch integration point at the moment.</div> </div> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap <s= pan dir=3D"ltr"> <<a href=3D"mailto:deepak.jagtap@maxta.com" target=3D"_blank">deepak.jag= tap@maxta.com</a>></span> wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> <div dir=3D"ltr"> <div id=3D"m_-9072135902178749810m_5891938740723837127m_-487324609517396822= 4divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;font-family:Ca= libri,Arial,Helvetica,sans-serif" dir=3D"ltr"> <p>Hey Guys,</p> <p><br> </p> <p>I am newbie to ovirt, and wanted to confirm whats the best way to levera= ge snapshot, clone features </p> <p>provided by the datastore filesystem.</p> <p>I have a btrfs datastore exported and wanted use btrfs snapshots fo= r vm snapshot & clones.</p> <p>Does ovirt offers any hooks/APIs so that image snapshots are created by = the filesystem?</p> <p><br> </p> <p>Thanks & Regards,</p> <p>Deepak</p> <p> </p> </div> </div> <br> ______________________________<wbr>_________________<br> Devel mailing list<br> <a href=3D"mailto:Devel@ovirt.org" target=3D"_blank">Devel@ovirt.org</a><br=
<a href=3D"http://lists.ovirt.org/mailman/listinfo/devel" rel=3D"noreferrer= " target=3D"_blank">http://lists.ovirt.org/mailman<wbr>/listinfo/devel</a><= br> </blockquote> </div> <br> </div> </div> </div> </span></div> </blockquote> </div> <br> </div> </div> </div> </div> </div> <br> ______________________________<wbr>_________________<br> Devel mailing list<br> <a href=3D"mailto:Devel@ovirt.org">Devel@ovirt.org</a><br> <a href=3D"http://lists.ovirt.org/mailman/listinfo/devel" rel=3D"noreferrer= " target=3D"_blank">http://lists.ovirt.org/<wbr>mailman/listinfo/devel</a><= br> </blockquote> </div> <br> </div> </div> </div> </body> </html> --_000_MWHPR11MB1663B80CFB0DAD1AD0B0C09CEDDA0MWHPR11MB1663namp_--