[Users] Storage domain weirdness (or design)

[Alex Leonhardt]

I was just thinking - maybe adding a setting to storage domains who's the
"master" for that specific storage domain would get around this ?

e.g. storage_domain_1 => master = HV1, storage_domain_2 => master = HV2,
etc. etc.

What do you think ?

Alex



On 18 January 2013 09:34, Alex Leonhardt <alex.tuxx at gmail.com> wrote:

> Hmmm, but if I put the SPM host into Maint mode, then all the VMs would
> either be migrated or (in my case, all set to manual) not available during
> that time, correct ?
>
> Would changing the SPM priority in the host config have the desired effect
> w/o putting the host into Maint mode ? Or can I only do that when the host
> is in Maint mode ?
>
>
> On 17 January 2013 20:42, Maor Lipchuk <mlipchuk at redhat.com> wrote:
>
>> Hi Alex,
>> See my last respond, I add a comment inline there.
>> See my comments inline
>>
>> Regards,
>> Maor.
>>
>> On 01/17/2013 10:04 PM, Alex Leonhardt wrote:
>> > Hiya,
>> >
>> > Yes i can choose the storage domain, but I cannot force the host that is
>> > to be used for creating it. Even with 1Gbit network, creating a 80GB
>> > disk / 40 GB disk is still significantly longer process than actually
>> > required when doing a "dd" of /dev/null over the network.
>> >
>> > Is it possible to manually change who is SPM master, create the
>> > disks/VMs required, and change it back ?
>> You can maintain your SPM host, and active it back again, this will
>> change the SPM to be the other host which you want.
>> > How would that change affect the running VMs / would they try to
>> migrate to the other HV ?
>> The VM migration will still be under the same cluster.
>>
>> SPM is simply used to write to the storage domains, one of the reasons
>> we use the SPM is to avoid collisions when hosts write to the same
>> storage domain.
>>
>> >
>> > Alex
>> >
>> >
>> > On 01/17/2013 07:39 PM, Maor Lipchuk wrote:
>> >> Hi Alex,
>> >> The storage domains are part of the Data Center, and should not be
>> >> related to clusters.
>> >> Clusters are used for migrating VMs, which are the qemu processes,
>> >> between hosts.
>> >> Disks are created on the storage domains regardless to clusters.
>> >>
>> >> The host which write the data in the storage domain to create the disk
>> >> is the SPM.
>> >> You should have only one SPM in each Data Center (You can spot which
>> >> host is your SPM by looking at the SPM column in the hosts tab)
>> >> When you create a disk you should be able to choose the storage domain
>> >> which you want the disk to be created on.
>> >>
>> >> Regards,
>> >> Maor
>>
>>
>>
>
>
> --
>
> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
>



-- 

| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
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