[ovirt-users] difference between thin/depentend and clone/dependent vm virtual machine
Tamer.americo
tamer.americo at gmail.com
Wed Apr 23 10:09:28 EDT 2014
hi,
no. is not hosted engine.
on server 01 I installed ovirt engine , vdsm, libvirt, postgres , etc using engine-setup . In this machine I have 3 VMs, all running centos65
this server 01 has ovirt web admin (jboss) and there I see all hosts ( server 01, 02 and 03) on the cluster. I can create and manage VM (thin and cloned)
tamer
Em 23/04/2014, às 10:21, Dafna Ron <dron at redhat.com> escreveu:
> what do you mean that host1 is engine + vdsm, are you using hosted engine?
>
>
>
> On 04/23/2014 01:59 PM, Tamer Lima wrote:
>>
>> hello,
>> thanks for reply
>>
>> my storage is NFS v3, defined on host 01. My DATA-DOMAIN and ISO-DOMAIN are hosted on host 01;
>> my SPM is located on host 03, I dont remember why. I tried to migrate SPM to host 01 but is not possible. All creation of virtual machine starts on server 01 (
>>
>>
>>
>>
>>
>>
>> On Wed, Apr 23, 2014 at 5:19 AM, Dafna Ron <dron at redhat.com <mailto:dron at redhat.com>> wrote:
>>
>> I think that you are mixing up a lot of different things and to be
>> honest I am not sure what configuration you have and what exactly
>> you are trying to do.
>> so lets try to simplify it?
>> what type of storage are you working on?
>> which host is the spm?
>>
>>
>>
>> On 04/22/2014 07:36 PM, Tamer Lima wrote:
>>
>> hello,
>>
>> I am in trouble
>>
>> I have 3 servers dedicated to test OVIRT:
>> 01- engine + vdsm (8 cpus, 32GB ram , 2TB HD)
>> 02 - vdsm (8 cpus, 32GB ram , 2TB HD)
>> 03 - vdsm (8 cpus, 32GB ram , 2TB HD)
>>
>> I want to create cloned virtual machines but in my
>> configuration I can only save virtual machines on server 01;
>> my configuration refers a DATA DOMAIN on server 01
>>
>> All my virtual machines are : 2 cpu , 6 GB ram , 500gb HD and
>> were created like CLONE
>>
>> My server 01 is the data domain and all new virtual machine is
>> created, via NFS, on server 01 , who has 2TB maximum capacity
>> ( the same size of partition /sda3 = 2TB)
>>
>> how can I save each virtual machine on a desired vdsm server ?
>>
>> What I want is :
>> server 01 - engine + vdsm : 03 virtual machines running and
>> hosted phisicaly on this host
>> server 02 - vdsm : 04 virtual machines running and hosted
>> phisicaly on this host
>> server 03 - vdsm : 04 virtual machines running and hosted
>> phisicaly on this host
>>
>> but I have this :
>> server 01 - engine + vdsm : 03 virtual machines running and
>> hosted phisicaly on this host
>> server 02 - vdsm : 01 virtual machines running on this server
>> BUT hosted phisicaly on server 01
>> server 03 - vdsm : none, because my DATA DOMAIN IS FULL (2TB )
>>
>> How to solve this problem ?
>> is it possible create one DATA DOMAIN for each VDSM host ? I
>> think this is the solution but I do not know how to point VMs
>> to be saved on specific data domain.
>>
>> thanks
>>
>>
>>
>>
>> On Fri, Apr 18, 2014 at 4:48 AM, Michal Skrivanek
>> <michal.skrivanek at redhat.com
>> <mailto:michal.skrivanek at redhat.com>
>> <mailto:michal.skrivanek at redhat.com
>> <mailto:michal.skrivanek at redhat.com>>> wrote:
>>
>>
>> On Apr 17, 2014, at 16:43 , Tamer Lima
>> <tamer.americo at gmail.com <mailto:tamer.americo at gmail.com>
>> <mailto:tamer.americo at gmail.com
>> <mailto:tamer.americo at gmail.com>>> wrote:
>>
>> > hi, thanks for reply
>> >
>> > I am investigating what is and how "thin virtualization"
>> works
>> >
>> > Do you know if HADOOP is indicated to work under "thin"
>> environment ?
>> > On Hadoop I will put large workloads and this thin
>> virtualization utilizes more resources than exists (shareable
>> environment)
>> > that is,
>> > if I have a real physical necessity of 500gb for each hadoop
>> host and my Thin Virtualization has 2TB on NFS, I can have
>> only 4
>> virtual machines (500GB each), or less.
>> >
>> > For this case I believe clone virtual machine is the right
>> choice. But in my environment it takes 1h30m to build one
>> cloned
>> virtual machine.
>>
>> if you plan to overcommit then go with thin. The drawback
>> is that
>> if you of course hit the physical limit the VMs will run
>> out of
>> space...
>> if you plan to allocate 500GB each, consume all of it,
>> never plan
>> to grow then go with the "clone"….yes, it's going to take
>> time to
>> write all that stuff. With "thin" you need to do the same
>> amount
>> of writes, but gradually over time while you're allocating
>> it it
>>
>> hope it helps
>>
>> Thanks,
>> michal
>>
>> >
>> >
>> >
>> > Am I correct ?
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Apr 17, 2014 at 7:33 AM, Michal Skrivanek
>> <michal.skrivanek at redhat.com
>> <mailto:michal.skrivanek at redhat.com>
>> <mailto:michal.skrivanek at redhat.com
>> <mailto:michal.skrivanek at redhat.com>>>
>>
>> wrote:
>> >
>> > On Apr 16, 2014, at 16:41 , Tamer Lima
>> <tamer.americo at gmail.com <mailto:tamer.americo at gmail.com>
>> <mailto:tamer.americo at gmail.com
>> <mailto:tamer.americo at gmail.com>>> wrote:
>> >
>> > >
>> > >
>> > > Hello,
>> > >
>> > > I created VMs by two ways :
>> > >
>> > > 1) on tab virtual machines > new vm > template
>> (centos_65_64bits)
>> > > 1.1 configuration : I do not select stateless checkbox
>> > > 1.2 this process takes a 1h30 to create each machine.
>> > >
>> > > 2) on tab pools > new vm > template (centos_65_64bits)
>> > > 2.1 default configuration : stateless
>> > > 2.2 Here I created 3 virtual machines at once
>> > > 2.3 this process takes only one minute
>> > >
>> > > On the tab virtual machines I can see all virtual
>> machines.
>> > > Pooled machines have different icon image
>> > > and description is different too:
>> > >
>> > > machines generated from tab VM are described as
>> clone/dependent
>> > > - clone is a phisical copy?
>> > > machines generated from tab POOL are described as
>> thin/independent
>> > > - thin is a just a reference to template vm ? what is
>> phisical? any configuration file?
>> >
>> > yeah, sort of.
>> > just google thin provisioning in general:)
>> >
>> >
>> > >
>> > >
>> > > In practice, what is the difference between these
>> machines ?
>> > >
>> > >
>> > >
>> > >
>> > > http://www.ovirt.org/Features/PrestartedVm
>> > > "Today there are 2 types of Vm pools:
>> > > • Manual - the Vm is supposed to be manually returned
>> to the
>> pool. In practice, this is not really entirely supported.
>> > > • Automatic - once the user shuts down the Vm - it
>> returns to
>> the pool (stateless)."
>> > >
>> > > all vm created from pool are stateless ?
>> >
>> > the automatic pool, yes
>> >
>> > Thanks,
>> > michal
>> >
>> > >
>> > >
>> > > thanks
>> > >
>> > >
>> > >
>> > > _______________________________________________
>> > > Users mailing list
>> > > Users at ovirt.org <mailto:Users at ovirt.org>
>> <mailto:Users at ovirt.org <mailto:Users at ovirt.org>>
>> > > http://lists.ovirt.org/mailman/listinfo/users
>>
>> >
>> >
>>
>>
>>
>>
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>>
>>
>> -- Dafna Ron
>>
>>
>
>
> --
> Dafna Ron
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