11 Feb
2015
11 Feb
'15
2:18 p.m.
------=_Part_9482614_1272915913.1423660680338 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit It will require an available size according to the disk snapshot you're attempting to remove. ----- Original Message ----- From: "Rik Theys" <Rik.Theys@esat.kuleuven.be> To: "Elad Ben Aharon" <ebenahar@redhat.com> Cc: users@ovirt.org Sent: Wednesday, 11 February, 2015 3:06:35 PM Subject: Re: [ovirt-users] Can't remove snapshot due to low disk space on storage domain? Hi, OK since my hosts are still CentOS 6.6, I will schedule downtime. Will removing it this way also require the additional disk space in the storage domain? Rik On 02/11/2015 02:03 PM, Elad Ben Aharon wrote: > Indeed, removing the disk snapshot from the 'Disk Snapshots' subtab will > remove only the snapshot of the disk, not the disk itself. > Regarding snapshot removal while the VM is running - this feature is > pretty new (live snapshot merge). AFAIK, this feature is tech preview > for 3.5. It also depends on the OS you're using on the hosts. RHEL 7.1 > supports it, but again, as tech preview. > Therefore, the safest way to remove the snapshot of the disk would be to > do it while the VM is not running. > > > ------------------------------------------------------------------------ > *From: *"Rik Theys" <Rik.Theys@esat.kuleuven.be> > *To: *"Elad Ben Aharon" <ebenahar@redhat.com> > *Cc: *users@ovirt.org > *Sent: *Wednesday, 11 February, 2015 2:44:55 PM > *Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk > space on storage domain? > > Hi, > > I created the snapshot on the Snapshots subtab of the Virtual machines > tab. I did this when my engine (and host) was running oVirt 3.4. It > is/was a snapshot of the entire VM (I deselected the memory state). > > I since upgraded the engine to 3.5. > > When I look at the snapshots subtab of the virtual machine, I see the > Current snapshot which is "Active VM" and the snapshot I created before. > This snapshot is a snapshot of both the OS and data disk. > > I can not delete the second snapshot when the VM is running. If I power > down the VM, I can't remove the snapshot as it brings up the error I > mentioned before. > > However, when I look at the disk snapshots subtab of the storage tab > (like you suggested), I see both disks with a snapshot and I can select > "Remove" there while the VM is running. Is it safe to remove them this > way? This will only remove the snapshot and not the disk (and data) from > my (running) VM? > > Regards, > > Rik > > > On 02/11/2015 01:26 PM, Elad Ben Aharon wrote: > > I'm not sure I understand which RHEV version you're using now. > > If you're using RHEV 3.5, it is possible to remove a snapshot of a > > single disk. > > You can do it via webadmin, Under the 'Disks Snapshots' subtab of the > > relevant storage domain, in the 'Storage' main tab. > > > > As for your second question, the free space has to be in the same > > storage domain. > > ------------------------------------------------------------------------ > > *From: *"Rik Theys" <Rik.Theys@esat.kuleuven.be> > > *To: *"Elad Ben Aharon" <ebenahar@redhat.com> > > *Cc: *users@ovirt.org > > *Sent: *Wednesday, 11 February, 2015 2:10:13 PM > > *Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk > > space on storage domain? > > > > Hi, > > > > Thats unfortunate :-(. It would have been great if oVirt told me during > > the creation of the snapshot that I would be unable to remove it later > > due to unsufficient free space in the storage domain :-). > > > > The VM has two disks - a small and a large one - so the snapshot > > contains both. Can I still remove the large disk while it has snapshots? > > > > Luckily the used disk space in the (preallocated) large disk is low > > enough so I can fit it on another temporary disk then. > > > > Does the free space have to be in the same storage domain, or can oVirt > > use another storage domain for the temporary volume? IOW, can I add an > > NFS storage domain which oVirt can use to create the temporary disk on? > > > > Regards, > > > > Rik > > > > > > On 02/11/2015 12:57 PM, Elad Ben Aharon wrote: > > > *equals or larger than the disk size > > > > > > > ------------------------------------------------------------------------ > > > *From: *"Elad Ben Aharon" <ebenahar@redhat.com> > > > *To: *"Rik Theys" <Rik.Theys@esat.kuleuven.be> > > > *Cc: *users@ovirt.org > > > *Sent: *Wednesday, 11 February, 2015 12:18:35 PM > > > *Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk > > > space on storage domain? > > > > > > Snapshot removal (merge) includes a create volume phase. This > volume is > > > temporary and gets removed once the snapshot merge is completed. Its > > > size is the size of the disk. > > > That means that in order to remove the snapshot, the storage domain > > > should have available size that is equal to the disk size. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Elad Ben Aharon > > > RHEV-QE storage > > > > > > > > > > ------------------------------------------------------------------------ > > > *From: *"Rik Theys" <Rik.Theys@esat.kuleuven.be> > > > *To: *users@ovirt.org > > > *Sent: *Tuesday, 10 February, 2015 12:00:10 PM > > > *Subject: *[ovirt-users] Can't remove snapshot due to low disk space > > > on storage domain? > > > > > > Hi, > > > > > > I'm running the ovirt engine 3.4 series. I've created a snapshot > of a VM > > > with an OS and data disk before upgrading the machine. > > > > > > The upgrade went fine and I now want to remove the snapshot. > > > Unfortunately this fails with the error: > > > > > > "Cannot remove Snapshot. Low disk space on target Storage Domain > > > stadius-virt2_PERC." > > > > > > So I can't free disk space by removing the snapshot because I > don't have > > > enough space? > > > > > > When I look at the VM the disks are shown as preallocated (which > is what > > > I selected during installation). When I look at the storage tab > and list > > > the disks in my storage domain, the disks are now shown as thin > > > provisioned with the actual size > virtual size. > > > > > > How can I remove this snapshot? I don't have enough free disk space in > > > my storage domain to duplicate the data disk of my VM. > > > > > > Regards, > > > > > > Rik > > > > > > > > > -- > > > Rik Theys > > > System Engineer > > > KU Leuven - Dept. Elektrotechniek (ESAT) > > > Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee > > > +32(0)16/32.11.07 > > > ---------------------------------------------------------------- > > > <<Any errors in spelling, tact or fact are transmission errors>> > > > _______________________________________________ > > > Users mailing list > > > Users@ovirt.org > > > http://lists.ovirt.org/mailman/listinfo/users > > > > > > > > > _______________________________________________ > > > Users mailing list > > > Users@ovirt.org > > > http://lists.ovirt.org/mailman/listinfo/users > > > > > > > > > -- > > Rik Theys > > System Engineer > > KU Leuven - Dept. Elektrotechniek (ESAT) > > Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee > > +32(0)16/32.11.07 > > ---------------------------------------------------------------- > > <<Any errors in spelling, tact or fact are transmission errors>> > > > > > -- > Rik Theys > System Engineer > KU Leuven - Dept. Elektrotechniek (ESAT) > Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee > +32(0)16/32.11.07 > ---------------------------------------------------------------- > <<Any errors in spelling, tact or fact are transmission errors>> > -- Rik Theys System Engineer KU Leuven - Dept. Elektrotechniek (ESAT) Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee +32(0)16/32.11.07 ---------------------------------------------------------------- <<Any errors in spelling, tact or fact are transmission errors>> ------=_Part_9482614_1272915913.1423660680338 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><body><div style=3D"font-family: times new roman, new york, times, se= rif; font-size: 12pt; color: #000000"><div>It will require an available siz= e according to the disk snapshot you're attempting to remove. <br></div><di= v><br></div><div><br></div><hr id=3D"zwchr"><div style=3D"color:#000;font-w= eight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,A= rial,sans-serif;font-size:12pt;"><b>From: </b>"Rik Theys" <Rik.Theys@esa= t.kuleuven.be><br><b>To: </b>"Elad Ben Aharon" <ebenahar@redhat.com&g= t;<br><b>Cc: </b>users@ovirt.org<br><b>Sent: </b>Wednesday, 11 February, 20= 15 3:06:35 PM<br><b>Subject: </b>Re: [ovirt-users] Can't remove snapshot du= e to low disk space on stora= ge domain?<br><div><br></div>Hi,<br><div><br></div>OK since my hosts are st= ill CentOS 6.6, I will schedule downtime.<br><div><br></div>Will removing i= t this way also require the additional disk space in the <br>storage domain= ?<br><div><br></div>Rik<br><div><br></div><br>On 02/11/2015 02:03 PM, Elad = Ben Aharon wrote:<br>> Indeed, removing the disk snapshot from the 'Disk= Snapshots' subtab will<br>> remove only the snapshot of the disk, not t= he disk itself.<br>> Regarding snapshot removal while the VM is ru= nning - this feature is<br>> pretty new (live snapshot merge). AFAIK, th= is feature is tech preview<br>> for 3.5. It also depends on the OS you'r= e using on the hosts. RHEL 7.1<br>> supports it, but again, as tech prev= iew.<br>> Therefore, the safest way to remove the snapshot of the disk w= ould be to<br>> do it while the VM is not running.<br>><br>><br>&g= t; ------------------------------------------------------------------------= <br>> *From: *"Rik Theys" <Rik.Theys@esat.kuleuven.be><br>> *To= : *"Elad Ben Aharon" <ebenahar@redhat.com><br>> *Cc: *users@ovirt.= org<br>> *Sent: *Wednesday, 11 February, 2015 2:44:55 PM<br>> *Subjec= t: *Re: [ovirt-users] Can't remove snapshot due to low disk<br>> space &= nbsp; on storage domain?<br>><br>> Hi,<br>><br= >> I created the snapshot on the Snapshots subtab of the Virtual machine= s<br>> tab. I did this when my engine (and host) was running oVirt 3.4. = It<br>> is/was a snapshot of the entire VM (I deselected the memory stat= e).<br>><br>> I since upgraded the engine to 3.5.<br>><br>> Whe= n I look at the snapshots subtab of the virtual machine, I see the<br>> = Current snapshot which is "Active VM" and the snapshot I created before.<br= >> This snapshot is a snapshot of both the OS and data disk.<br>><br>= > I can not delete the second snapshot when the VM is running. If I powe= r<br>> down the VM, I can't remove the snapshot as it brings up the erro= r I<br>> mentioned before.<br>><br>> However, when I look at the d= isk snapshots subtab of the storage tab<br>> (like you suggested), I see= both disks with a snapshot and I can select<br>> "Remove" there while t= he VM is running. Is it safe to remove them this<br>> way? This will onl= y remove the snapshot and not the disk (and data) from<br>> my (running)= VM?<br>><br>> Regards,<br>><br>> Rik<br>><br>><br>> O= n 02/11/2015 01:26 PM, Elad Ben Aharon wrote:<br>> > I'm not su= re I understand which RHEV version you're using now.<br>> > If = you're using RHEV 3.5, it is possible to remove a snapshot of a<br>> &nb= sp;> single disk.<br>> > You can do it via webadmin, Under t= he 'Disks Snapshots' subtab of the<br>> > relevant storage doma= in, in the 'Storage' main tab.<br>> ><br>> > As for= your second question, the free space has to be in the same<br>> &= gt; storage domain.<br>> > ------------------------------------= ------------------------------------<br>> > *From: *"Rik Theys"= <Rik.Theys@esat.kuleuven.be><br>> > *To: *"Elad Ben Ahar= on" <ebenahar@redhat.com><br>> > *Cc: *users@ovirt.org<br= >> > *Sent: *Wednesday, 11 February, 2015 2:10:13 PM<br>> &n= bsp;> *Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk= <br>> > space on storage domain?<br>= > ><br>> > Hi,<br>> ><br>> >= ; Thats unfortunate :-(. It would have been great if oVirt told me during<b= r>> > the creation of the snapshot that I would be unable to re= move it later<br>> > due to unsufficient free space in the stor= age domain :-).<br>> ><br>> > The VM has two disks = - a small and a large one - so the snapshot<br>> > contains bot= h. Can I still remove the large disk while it has snapshots?<br>> = ><br>> > Luckily the used disk space in the (preallocated) l= arge disk is low<br>> > enough so I can fit it on another tempo= rary disk then.<br>> ><br>> > Does the free space h= ave to be in the same storage domain, or can oVirt<br>> > use a= nother storage domain for the temporary volume? IOW, can I add an<br>> &= nbsp;> NFS storage domain which oVirt can use to create the temporary di= sk on?<br>> ><br>> > Regards,<br>> ><br= >> > Rik<br>> ><br>> ><br>> &g= t; On 02/11/2015 12:57 PM, Elad Ben Aharon wrote:<br>> > = > *equals or larger than the disk size<br>> > ><br>= > > ><br>> ----------------------------------------= --------------------------------<br>> > > *From: *"Ela= d Ben Aharon" <ebenahar@redhat.com><br>> > > *To= : *"Rik Theys" <Rik.Theys@esat.kuleuven.be><br>> > = > *Cc: *users@ovirt.org<br>> > > *Sent: *Wednesday,= 11 February, 2015 12:18:35 PM<br>> > > *Subject: *Re:= [ovirt-users] Can't remove snapshot due to low disk<br>> > &nb= sp;> space on stor= age domain?<br>> > ><br>> > > Sna= pshot removal (merge) includes a create volume phase. This<br>> volume i= s<br>> > > temporary and gets removed once the snapsho= t merge is completed. Its<br>> > > size is the size of= the disk.<br>> > > That means that in order to remove= the snapshot, the storage domain<br>> > > should have= available size that is equal to the disk size.<br>> > &g= t;<br>> > ><br>> > ><br>> &nbs= p;> ><br>> > ><br>> > &g= t;<br>> > ><br>> > ><br>> &nbs= p;> ><br>> > > Elad Ben Aharon<br>> &nb= sp;> > RHEV-QE storage<br>> > ><br>> &n= bsp;> ><br>> > ><br>> -----------------= -------------------------------------------------------<br>> > = > *From: *"Rik Theys" <Rik.Theys@esat.kuleuven.be><br>> &= nbsp;> > *To: *users@ovirt.org<br>> > > *S= ent: *Tuesday, 10 February, 2015 12:00:10 PM<br>> > > = *Subject: *[ovirt-users] Can't remove snapshot due to low disk space<br>>= ; > > on storage domain?<br>&g= t; > ><br>> > > Hi,<br>> &g= t; ><br>> > > I'm running the ovirt engine 3.= 4 series. I've created a snapshot<br>> of a VM<br>> > = > with an OS and data disk before upgrading the machine.<br>> &= gt; ><br>> > > The upgrade went fine and I no= w want to remove the snapshot.<br>> > > Unfortunately = this fails with the error:<br>> > ><br>> >= > "Cannot remove Snapshot. Low disk space on target Storage Domai= n<br>> > > stadius-virt2_PERC."<br>> > &nb= sp;><br>> > > So I can't free disk space by removin= g the snapshot because I<br>> don't have<br>> > > e= nough space?<br>> > ><br>> > > Wh= en I look at the VM the disks are shown as preallocated (which<br>> is w= hat<br>> > > I selected during installation). When I l= ook at the storage tab<br>> and list<br>> > > the d= isks in my storage domain, the disks are now shown as thin<br>> &g= t; > provisioned with the actual size > virtual size.<br>> &= nbsp;> ><br>> > > How can I remove this sn= apshot? I don't have enough free disk space in<br>> > >= ; my storage domain to duplicate the data disk of my VM.<br>> >= ><br>> > > Regards,<br>> > = ;><br>> > > Rik<br>> > ><br>&g= t; > ><br>> > > --<br>> >= ; > Rik Theys<br>> > > System Engineer<br>>= ; > > KU Leuven - Dept. Elektrotechniek (ESAT)<br>> &n= bsp;> > Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-= Heverlee<br>> > > +32(0)16/32.11.07<br>> >= > ---------------------------------------------------------------= -<br>> > > <<Any errors in spelling, tact or fac= t are transmission errors>><br>> > > ___________= ____________________________________<br>> > > Users ma= iling list<br>> > > Users@ovirt.org<br>> >= > http://lists.ovirt.org/mailman/listinfo/users<br>> >= ; ><br>> > ><br>> > > __= _____________________________________________<br>> > >= Users mailing list<br>> > > Users@ovirt.org<br>> &= nbsp;> > http://lists.ovirt.org/mailman/listinfo/users<br>> = > ><br>> ><br>> ><br>> &= gt; --<br>> > Rik Theys<br>> > System Engineer<br>&= gt; > KU Leuven - Dept. Elektrotechniek (ESAT)<br>> > = Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee<br>> &nb= sp;> +32(0)16/32.11.07<br>> > ------------------------------= ----------------------------------<br>> > <<Any errors in= spelling, tact or fact are transmission errors>><br>> ><= br>><br>><br>> --<br>> Rik Theys<br>> System Engineer<br>>= ; KU Leuven - Dept. Elektrotechniek (ESAT)<br>> Kasteelpark Arenberg 10 = bus 2440 - B-3001 Leuven-Heverlee<br>> +32(0)16/32.11.07<br>> -= ---------------------------------------------------------------<br>> <= ;<Any errors in spelling, tact or fact are transmission errors>><b= r>><br><div><br></div><br>-- <br>Rik Theys<br>System Engineer<br>KU Leuv= en - Dept. Elektrotechniek (ESAT)<br>Kasteelpark Arenberg 10 bus 2440 = ;- B-3001 Leuven-Heverlee<br>+32(0)16/32.11.07<br>-------------------------= ---------------------------------------<br><<Any errors in spelling, = tact or fact are transmission errors>><br></div><div><br></div></div>= </body></html> ------=_Part_9482614_1272915913.1423660680338--