Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-11 Thread Barak Korren 
On 11 November 2015 at 01:02, Liam Curtis  wrote:
> Thanks for this info! Would be great if the temporary storage could
> ultimately be made to be persistent

Having persistent data on local storage will make your life very hard
when the time comes around to secure and back up that important data.
I think you can enjoy both worlds by using temporary local storage for
I/O-intensive calculation, and then store the important final results
to a central storage you can easily secure and back up.
If what you want to do is pool together your local storage to get
something that looks like a cheap central storage, then you are in the
realm of ceph/gluster/hyper-converge. There is a performance and
complexity overhead to using those technologies. (And not everything
is supported by oVirt yet)

-- 
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-11 Thread Liam Curtis 
Great..thanks all very much for insight and advice. Keep up the great work.
This is a very vibrant and supportive community.

On Wed, Nov 11, 2015 at 4:51 AM, Barak Korren  wrote:

> On 11 November 2015 at 01:02, Liam Curtis  wrote:
> > Thanks for this info! Would be great if the temporary storage could
> > ultimately be made to be persistent
>
> Having persistent data on local storage will make your life very hard
> when the time comes around to secure and back up that important data.
> I think you can enjoy both worlds by using temporary local storage for
> I/O-intensive calculation, and then store the important final results
> to a central storage you can easily secure and back up.
> If what you want to do is pool together your local storage to get
> something that looks like a cheap central storage, then you are in the
> realm of ceph/gluster/hyper-converge. There is a performance and
> complexity overhead to using those technologies. (And not everything
> is supported by oVirt yet)
>
> --
> Barak Korren
> bkor...@redhat.com
> RHEV-CI Team
>
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-10 Thread Liam Curtis 
Thanks for this info! Would be great if the temporary storage could
ultimately be made to be persistent
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-09 Thread Barak Korren 
On 9 November 2015 at 09:18, Sandro Bonazzola  wrote:

>
>
> On Sun, Nov 8, 2015 at 9:22 AM, Barak Korren  wrote:
>
>>
>>
>> On 3 November 2015 at 07:48, Liam Curtis  wrote:
>>
>>> Any chance this will change? It is a severe limitation to not be able to
>>> use local storage available to a host as that is often very fast storage.
>>>
>>>
>> It is not completely impossible to mix shared and local storage. There is
>> a VDSM hook that allows you to attach some local storage to a VM, stored on
>> a shared storage, for temporary use.
>> We actually plan to try and use it in the oVirt CI infrastructure to
>> speed up builds and other random-I/O-intensive operations.
>> Anton Marchukov from the oVirt infra team could give you more details
>> about that.
>>
>>
>
> Please document this somewhere in the wiki as well.
>


There is this: http://www.ovirt.org/VDSM-Hooks/scratchpad


>
>
>
>>
>>
>>> On Sun, Nov 1, 2015 at 10:22 AM, Aharon Canan  wrote:
>>>
 No...

 when creating DC you choose shared/local (where gluster is shared)

 You can mix shared (gluster/iscsi/nfs etc) but not local.




 Regards,
 __
 Aharon Canan

 --

 *From: *"Liam Curtis" 
 *To: *Users@ovirt.org
 *Sent: *Sunday, November 1, 2015 5:17:58 PM
 *Subject: *[ovirt-users] Wishlist - Mix gluster and local storage in
 same datacenter

 Hello all...

 Would like to be able to use both local storage and gluster within same
 host / data center.

 Wondering if this is something being worked on?

 ___
 Users mailing list
 Users@ovirt.org
 http://lists.ovirt.org/mailman/listinfo/users



>>>
>>>
>>> --
>>>
>>> *Liam Curtis*
>>> Manager of Systems EngineeringDatto, Inc.(203) 529-4949 x228
>>> www.datto.com
>>>
>>> 
>>> Join the conversation! [image: Facebook]
>>>  [image: Twitter]
>>>  [image: LinkedIn]
>>>  [image: Blog RSS]
>>>  [image: YouTube]
>>>  [image: Google Plus
>>> Page] 
>>>
>>> ___
>>> Users mailing list
>>> Users@ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>>
>> --
>> *Barak Korren*
>> bkor...@redhat.com
>> RHEV-CI Team
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
>
> --
> Sandro Bonazzola
> Better technology. Faster innovation. Powered by community collaboration.
> See how it works at redhat.com
>



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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-08 Thread Alex Crow 

Messed up the quote. removed it for clarity:
One thing that would render this whole issue moot is being able to use 
local fast storage on the hypervisor hosts, ie SSD or 3D-Xpoint drives 
in LVM-Cache to accelerate IOPS on shared storage.


The underlying stuff is already there, and it works. I've been using 
LVM cache for while in Centos 7.


Geting this to work in oVirt would be a killer feature.

Alex
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-08 Thread Alex Crow 
There are many things that tie a VM to a host, like USB device 
passthrough, but that's not reason to remove all such support from 
oVirt, is it? In my case, I'd like to mix iSCSI and local storage, 
because I have a couple of systems that need higher disk I/O that I'd 
like to put on my shared storage. The two systems are redundant to each 
other, so that is taken care of at a different layer. The two systems 
don't however consume all the resources of the host machines (lots of 
CPU and RAM available). I'd like to make them nodes in my oVirt cluster, 
so those resources can be used for other VMs (that are on shared storage 
for that level of HA), but I can't do that (at least as far as I know, 
with oVirt 3.5). I thought that had been mentioned as a feature for 3.6, 
but I don't see it anywhere in the features or release notes, so I 
assume that functionality is still not available.


One thing that would render this whole issue moot is being able to use 
local fast storage on the hypervisor hosts, ie SSD or 3D-Xpoint drives 
in LVM-Cache to accelerate IOPS on shared storage.


The underlying stuff is already there, and it works. I've been using LVM 
cache for while in Centos 7.


Geting this to work in oVirt would be a killer feature.

Alex
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The information provided is correct to our knowledge & belief and must not
be used as a substitute for obtaining tax, regulatory, investment, legal or
any other appropriate advice.

"Transact" is operated by Integrated Financial Arrangements Ltd.
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-08 Thread Sandro Bonazzola 
On Sun, Nov 8, 2015 at 9:22 AM, Barak Korren  wrote:

>
>
> On 3 November 2015 at 07:48, Liam Curtis  wrote:
>
>> Any chance this will change? It is a severe limitation to not be able to
>> use local storage available to a host as that is often very fast storage.
>>
>>
> It is not completely impossible to mix shared and local storage. There is
> a VDSM hook that allows you to attach some local storage to a VM, stored on
> a shared storage, for temporary use.
> We actually plan to try and use it in the oVirt CI infrastructure to speed
> up builds and other random-I/O-intensive operations.
> Anton Marchukov from the oVirt infra team could give you more details
> about that.
>
>

Please document this somewhere in the wiki as well.



>
>
>> On Sun, Nov 1, 2015 at 10:22 AM, Aharon Canan  wrote:
>>
>>> No...
>>>
>>> when creating DC you choose shared/local (where gluster is shared)
>>>
>>> You can mix shared (gluster/iscsi/nfs etc) but not local.
>>>
>>>
>>>
>>>
>>> Regards,
>>> __
>>> Aharon Canan
>>>
>>> --
>>>
>>> *From: *"Liam Curtis" 
>>> *To: *Users@ovirt.org
>>> *Sent: *Sunday, November 1, 2015 5:17:58 PM
>>> *Subject: *[ovirt-users] Wishlist - Mix gluster and local storage in
>>> same datacenter
>>>
>>> Hello all...
>>>
>>> Would like to be able to use both local storage and gluster within same
>>> host / data center.
>>>
>>> Wondering if this is something being worked on?
>>>
>>> ___
>>> Users mailing list
>>> Users@ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>>
>>
>>
>> --
>>
>> *Liam Curtis*
>> Manager of Systems EngineeringDatto, Inc.(203) 529-4949 x228
>> www.datto.com
>>
>> 
>> Join the conversation! [image: Facebook]
>>  [image: Twitter]
>>  [image: LinkedIn]
>>  [image: Blog RSS]
>>  [image: YouTube]
>>  [image: Google Plus Page]
>> 
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
>
> --
> *Barak Korren*
> bkor...@redhat.com
> RHEV-CI Team
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>


-- 
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Better technology. Faster innovation. Powered by community collaboration.
See how it works at redhat.com
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-08 Thread Barak Korren 
On 3 November 2015 at 07:48, Liam Curtis  wrote:

> Any chance this will change? It is a severe limitation to not be able to
> use local storage available to a host as that is often very fast storage.
>
>
It is not completely impossible to mix shared and local storage. There is a
VDSM hook that allows you to attach some local storage to a VM, stored on a
shared storage, for temporary use.
We actually plan to try and use it in the oVirt CI infrastructure to speed
up builds and other random-I/O-intensive operations.
Anton Marchukov from the oVirt infra team could give you more details about
that.



> On Sun, Nov 1, 2015 at 10:22 AM, Aharon Canan  wrote:
>
>> No...
>>
>> when creating DC you choose shared/local (where gluster is shared)
>>
>> You can mix shared (gluster/iscsi/nfs etc) but not local.
>>
>>
>>
>>
>> Regards,
>> __
>> Aharon Canan
>>
>> --
>>
>> *From: *"Liam Curtis" 
>> *To: *Users@ovirt.org
>> *Sent: *Sunday, November 1, 2015 5:17:58 PM
>> *Subject: *[ovirt-users] Wishlist - Mix gluster and local storage in
>> same datacenter
>>
>> Hello all...
>>
>> Would like to be able to use both local storage and gluster within same
>> host / data center.
>>
>> Wondering if this is something being worked on?
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>>
>
>
> --
>
> *Liam Curtis*
> Manager of Systems EngineeringDatto, Inc.(203) 529-4949 x228
> www.datto.com
>
> 
> Join the conversation! [image: Facebook]
>  [image: Twitter]
>  [image: LinkedIn]
>  [image: Blog RSS]
>  [image: YouTube]
>  [image: Google Plus Page]
> 
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>


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bkor...@redhat.com
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-07 Thread Nir Soffer 
On Tue, Nov 3, 2015 at 7:48 AM, Liam Curtis  wrote:
>
> Any chance this will change? It is a severe limitation to not be able to use 
> local storage available to a host as that is often very fast storage.

This will couple the vm to this host, so you cannot run it to another
host. If this host
is down, you cannot run the vm on any other host, since your storage is gone.

Don't you think this is a severe limitation as well?

The current system is focused on high availability; all hosts must be
able to access all
storage domains in the data center, so you can run any vm on all hosts
on the data center.

If you don't need to migrate vms or manage shared storage, you can use
virt-manager
to run vms on specific hosts.

Nir

>
>
> On Sun, Nov 1, 2015 at 10:22 AM, Aharon Canan  wrote:
>>
>> No...
>>
>> when creating DC you choose shared/local (where gluster is shared)
>>
>> You can mix shared (gluster/iscsi/nfs etc) but not local.
>>
>>
>>
>>
>> Regards,
>> __
>> Aharon Canan
>>
>> 
>>
>> From: "Liam Curtis" 
>> To: Users@ovirt.org
>> Sent: Sunday, November 1, 2015 5:17:58 PM
>> Subject: [ovirt-users] Wishlist - Mix gluster and local storage in same data 
>>center
>>
>> Hello all...
>>
>> Would like to be able to use both local storage and gluster within same host 
>> / data center.
>>
>> Wondering if this is something being worked on?
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
>
>
> --
>
> Liam Curtis
> Manager of Systems Engineering
> Datto, Inc.
> (203) 529-4949 x228
> www.datto.com
>
>
> Join the conversation!
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-07 Thread Chris Adams 
Once upon a time, Nir Soffer  said:
> On Tue, Nov 3, 2015 at 7:48 AM, Liam Curtis  wrote:
> >
> > Any chance this will change? It is a severe limitation to not be able to 
> > use local storage available to a host as that is often very fast storage.
> 
> This will couple the vm to this host, so you cannot run it to another
> host. If this host
> is down, you cannot run the vm on any other host, since your storage is gone.
> 
> Don't you think this is a severe limitation as well?

There are many things that tie a VM to a host, like USB device
passthrough, but that's not reason to remove all such support from
oVirt, is it?

In my case, I'd like to mix iSCSI and local storage, because I have a
couple of systems that need higher disk I/O that I'd like to put on my
shared storage.  The two systems are redundant to each other, so that is
taken care of at a different layer.

The two systems don't however consume all the resources of the host
machines (lots of CPU and RAM available).  I'd like to make them nodes
in my oVirt cluster, so those resources can be used for other VMs (that
are on shared storage for that level of HA), but I can't do that (at
least as far as I know, with oVirt 3.5).  I thought that had been
mentioned as a feature for 3.6, but I don't see it anywhere in the
features or release notes, so I assume that functionality is still not
available.

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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-02 Thread Liam Curtis 
Any chance this will change? It is a severe limitation to not be able to
use local storage available to a host as that is often very fast storage.

On Sun, Nov 1, 2015 at 10:22 AM, Aharon Canan  wrote:

> No...
>
> when creating DC you choose shared/local (where gluster is shared)
>
> You can mix shared (gluster/iscsi/nfs etc) but not local.
>
>
>
>
> Regards,
> __
> Aharon Canan
>
> --
>
> *From: *"Liam Curtis" 
> *To: *Users@ovirt.org
> *Sent: *Sunday, November 1, 2015 5:17:58 PM
> *Subject: *[ovirt-users] Wishlist - Mix gluster and local storage in same
> datacenter
>
> Hello all...
>
> Would like to be able to use both local storage and gluster within same
> host / data center.
>
> Wondering if this is something being worked on?
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
>


-- 

*Liam Curtis*
Manager of Systems EngineeringDatto, Inc.(203) 529-4949 x228
www.datto.com


Join the conversation! [image: Facebook]
 [image:
Twitter]  [image: LinkedIn]
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Re: [ovirt-users] Wishlist - Mix gluster and local storage in same data center

2015-11-01 Thread Aharon Canan 
No... 

when creating DC you choose shared/local (where gluster is shared) 

You can mix shared (gluster/iscsi/nfs etc) but not local. 

Regards, 
__ 
Aharon Canan 

- Original Message -

> From: "Liam Curtis" 
> To: Users@ovirt.org
> Sent: Sunday, November 1, 2015 5:17:58 PM
> Subject: [ovirt-users] Wishlist - Mix gluster and local storage in same data
> center

> Hello all...

> Would like to be able to use both local storage and gluster within same host
> / data center.

> Wondering if this is something being worked on?

> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
___
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