[ovirt-users] Re: Changing from thin provisioned to preallocated?

2019-04-18 Thread Karli Sjöberg 

On 2019-04-17 13:31, Wesley Stewart wrote:
>  Appreciate the response!
>
> But there is plenty of space available.  About 250 free GBs. My test
> VM is about 40gb.
>
> On Tue, Apr 16, 2019, 1:12 AM Eyal Shenitzky  > wrote:
>
> Hi Wesley,
>
> Currently, there is no direct way to change disks allocation
> policy (thin-provision <-> preallocation).
>
> In your case, it sounds like your ISCSI storage is running out of
> space, changing disk from thin-provisioned to preallocation will
> consume *more* space on the storage, thin-provision is more space
> effective but impact the performance.
>
> On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart
> mailto:wstewa...@gmail.com>> wrote:
>
> I am currently running a ZFS server (Running RaidZ2) and I
> have been experimenting with NFS and shares to host my
> guests.  I am currently running oVirt 4.2.8 and using a RaidZ2
> NFS mount for the guests.
>
> ZFS definitely is definitely pretty awful (At least in my
> experience so far) for hosting VMs.
>
ZFS is definitely pretty awful at keeping your data _unsafe_ : )

Add a piece of the SSD's as mirrored SLOG and be both safe as fast. My
two cents.

/K

> I believe this is due to the synchronous writes being
> performed.  However, I think running an iSCSI target with
> Synchronization disabled over a 10Gb connection might do the
> trick. (I have a couple of mirroed SSD drives for performance
> if I need it, but the RaidZ2 crawls for disk speed).
>
> When I tried to migrate a thin provisioned guest to iSCSI, I
> keep getting an "Out of disk space error" which I am pretty
> sure is due to the block style storage on the iSCSI target. 
> Is there a way to switch from Thin to Preallocated?  Or is my
> best bet to try and take a snapshot and clone this into a
> pre-allocated disk?
> ___
> Users mailing list -- users@ovirt.org 
> To unsubscribe send an email to users-le...@ovirt.org
> 
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
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> 
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>
>
>
> -- 
> Regards,
> Eyal Shenitzky
>
> On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart
> mailto:wstewa...@gmail.com>> wrote:
>
> I am currently running a ZFS server (Running RaidZ2) and I
> have been experimenting with NFS and shares to host my
> guests.  I am currently running oVirt 4.2.8 and using a RaidZ2
> NFS mount for the guests.
>
> ZFS definitely is definitely pretty awful (At least in my
> experience so far) for hosting VMs.  I believe this is due to
> the synchronous writes being performed.  However, I think
> running an iSCSI target with Synchronization disabled over a
> 10Gb connection might do the trick. (I have a couple of
> mirroed SSD drives for performance if I need it, but the
> RaidZ2 crawls for disk speed).
>
> When I tried to migrate a thin provisioned guest to iSCSI, I
> keep getting an "Out of disk space error" which I am pretty
> sure is due to the block style storage on the iSCSI target. 
> Is there a way to switch from Thin to Preallocated?  Or is my
> best bet to try and take a snapshot and clone this into a
> pre-allocated disk?
> ___
> Users mailing list -- users@ovirt.org 
> To unsubscribe send an email to users-le...@ovirt.org
> 
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct:
> https://www.ovirt.org/community/about/community-guidelines/
> List Archives:
> 
> https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZDBAGS6Y66SJATBCVDNSLWYTOYIXHJR/
>
>
>
> -- 
> Regards,
> Eyal Shenitzky
>
>
> ___
> Users mailing list -- users@ovirt.org
> To unsubscribe send an email to users-le...@ovirt.org
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct: 
> https://www.ovirt.org/community/about/community-guidelines/
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> https://lists.ovirt.org/archives/list/users@ovirt.org/message/NQCOAS5NJKZ3XRIHGKDD75BVMTI5RCNG/


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[ovirt-users] Re: Changing from thin provisioned to preallocated?

2019-04-17 Thread Wesley Stewart 
 Appreciate the response!

But there is plenty of space available.  About 250 free GBs. My test VM is
about 40gb.

On Tue, Apr 16, 2019, 1:12 AM Eyal Shenitzky  wrote:

> Hi Wesley,
>
> Currently, there is no direct way to change disks allocation policy
> (thin-provision <-> preallocation).
>
> In your case, it sounds like your ISCSI storage is running out of space,
> changing disk from thin-provisioned to preallocation will consume *more* space
> on the storage, thin-provision is more space effective but impact the
> performance.
>
> On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart 
> wrote:
>
>> I am currently running a ZFS server (Running RaidZ2) and I have been
>> experimenting with NFS and shares to host my guests.  I am currently
>> running oVirt 4.2.8 and using a RaidZ2 NFS mount for the guests.
>>
>> ZFS definitely is definitely pretty awful (At least in my experience so
>> far) for hosting VMs.  I believe this is due to the synchronous writes
>> being performed.  However, I think running an iSCSI target with
>> Synchronization disabled over a 10Gb connection might do the trick. (I have
>> a couple of mirroed SSD drives for performance if I need it, but the RaidZ2
>> crawls for disk speed).
>>
>> When I tried to migrate a thin provisioned guest to iSCSI, I keep getting
>> an "Out of disk space error" which I am pretty sure is due to the block
>> style storage on the iSCSI target.  Is there a way to switch from Thin to
>> Preallocated?  Or is my best bet to try and take a snapshot and clone this
>> into a pre-allocated disk?
>> ___
>> Users mailing list -- users@ovirt.org
>> To unsubscribe send an email to users-le...@ovirt.org
>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>> oVirt Code of Conduct:
>> https://www.ovirt.org/community/about/community-guidelines/
>> List Archives:
>> https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZDBAGS6Y66SJATBCVDNSLWYTOYIXHJR/
>>
>
>
> --
> Regards,
> Eyal Shenitzky
>
> On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart 
> wrote:
>
>> I am currently running a ZFS server (Running RaidZ2) and I have been
>> experimenting with NFS and shares to host my guests.  I am currently
>> running oVirt 4.2.8 and using a RaidZ2 NFS mount for the guests.
>>
>> ZFS definitely is definitely pretty awful (At least in my experience so
>> far) for hosting VMs.  I believe this is due to the synchronous writes
>> being performed.  However, I think running an iSCSI target with
>> Synchronization disabled over a 10Gb connection might do the trick. (I have
>> a couple of mirroed SSD drives for performance if I need it, but the RaidZ2
>> crawls for disk speed).
>>
>> When I tried to migrate a thin provisioned guest to iSCSI, I keep getting
>> an "Out of disk space error" which I am pretty sure is due to the block
>> style storage on the iSCSI target.  Is there a way to switch from Thin to
>> Preallocated?  Or is my best bet to try and take a snapshot and clone this
>> into a pre-allocated disk?
>> ___
>> Users mailing list -- users@ovirt.org
>> To unsubscribe send an email to users-le...@ovirt.org
>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>> oVirt Code of Conduct:
>> https://www.ovirt.org/community/about/community-guidelines/
>> List Archives:
>> https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZDBAGS6Y66SJATBCVDNSLWYTOYIXHJR/
>>
>
>
> --
> Regards,
> Eyal Shenitzky
>
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[ovirt-users] Re: Changing from thin provisioned to preallocated?

2019-04-15 Thread Eyal Shenitzky 
Hi Wesley,

Currently, there is no direct way to change disks allocation policy
(thin-provision <-> preallocation).

In your case, it sounds like your ISCSI storage is running out of space,
changing disk from thin-provisioned to preallocation will consume *more* space
on the storage, thin-provision is more space effective but impact the
performance.

On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart  wrote:

> I am currently running a ZFS server (Running RaidZ2) and I have been
> experimenting with NFS and shares to host my guests.  I am currently
> running oVirt 4.2.8 and using a RaidZ2 NFS mount for the guests.
>
> ZFS definitely is definitely pretty awful (At least in my experience so
> far) for hosting VMs.  I believe this is due to the synchronous writes
> being performed.  However, I think running an iSCSI target with
> Synchronization disabled over a 10Gb connection might do the trick. (I have
> a couple of mirroed SSD drives for performance if I need it, but the RaidZ2
> crawls for disk speed).
>
> When I tried to migrate a thin provisioned guest to iSCSI, I keep getting
> an "Out of disk space error" which I am pretty sure is due to the block
> style storage on the iSCSI target.  Is there a way to switch from Thin to
> Preallocated?  Or is my best bet to try and take a snapshot and clone this
> into a pre-allocated disk?
> ___
> Users mailing list -- users@ovirt.org
> To unsubscribe send an email to users-le...@ovirt.org
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct:
> https://www.ovirt.org/community/about/community-guidelines/
> List Archives:
> https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZDBAGS6Y66SJATBCVDNSLWYTOYIXHJR/
>


-- 
Regards,
Eyal Shenitzky

On Mon, Apr 15, 2019 at 8:35 PM Wesley Stewart  wrote:

> I am currently running a ZFS server (Running RaidZ2) and I have been
> experimenting with NFS and shares to host my guests.  I am currently
> running oVirt 4.2.8 and using a RaidZ2 NFS mount for the guests.
>
> ZFS definitely is definitely pretty awful (At least in my experience so
> far) for hosting VMs.  I believe this is due to the synchronous writes
> being performed.  However, I think running an iSCSI target with
> Synchronization disabled over a 10Gb connection might do the trick. (I have
> a couple of mirroed SSD drives for performance if I need it, but the RaidZ2
> crawls for disk speed).
>
> When I tried to migrate a thin provisioned guest to iSCSI, I keep getting
> an "Out of disk space error" which I am pretty sure is due to the block
> style storage on the iSCSI target.  Is there a way to switch from Thin to
> Preallocated?  Or is my best bet to try and take a snapshot and clone this
> into a pre-allocated disk?
> ___
> Users mailing list -- users@ovirt.org
> To unsubscribe send an email to users-le...@ovirt.org
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct:
> https://www.ovirt.org/community/about/community-guidelines/
> List Archives:
> https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZDBAGS6Y66SJATBCVDNSLWYTOYIXHJR/
>


-- 
Regards,
Eyal Shenitzky
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