[one-users] OpenNebula with additional storage

[Ruben S. Montero]

Hi

So I assume that you have 2 different NFS shares (or equivalent):

About Mount Points

They **must** use the same ID as the one assigned by OpenNebula. So if you
want datastore with ID 100 be backed by datastore1 (192.168.8.11), then you
must mount the volume on /var/lib/one/datastore/100. Same apply to 0,1
default and system datastores created by OpenNebula by default.

About Datastore Types and Usage

There are two types of Datastores: Images where you usually store base
images (e.g. default ID:1) and system where the VMs run from (e.g. system
ID:0). And there are three types of images: persistent no copy from image
to system datastores (link); no-persistent images are copied (cloned) to
the system datastore; and volatile disks, always created in the datastore.

Summary, register an image (oneimage create) will take space from your
image DS, deploying a vm (onevm deploy) will take space from your system
DS. How much space? It depends on the image (persistent vs non-persistent)
and the format raw vs qcow2.

You  also need to consider that checkpoints (suspend/stop a VM) will
generate a checkpoint file to be stored also in the system DS


Hope you can now plan better your storage.

Cheers

Ruben



On Wed, Sep 18, 2013 at 4:18 PM, Amier Anis <mymabma at gmail.com> wrote:

> Guys,
>
> any suggestion or advise. really need your help.
>
> On Tue, Sep 17, 2013 at 7:41 PM, Amier Anis <mymabma at gmail.com> wrote:
>
>> Hi,
>>
>> I would like to know how I should implement the datastore if I have 2
>> different size of storage but with same datastore types (shared FS). As I
>> know I need to I need to mount the target datastore to very hosts.
>>
>> However, I little bit confuse on the datastore structure and where to
>> mount the the first datastore1 (192.168.8.11) and 2nd datastore2
>> (192.168.8.12). Is that correct if i mount the datastore like this at every
>> node?
>>
>> *Method 1*
>>
>>    1. datastore1 to /var/lib/one/datastore/0
>>    2. datastore2 to /var/lib/one/datastore/1
>>
>> or i need to like this
>>
>> *Method 2*
>>
>>    1. datastore1 to /var/lib/one/datastore/1
>>    2. datastore2 to /var/lib/one/datastore/2
>>
>> Is the /var/lib/one/datastore/0 is for frontend use? how much space we
>> need if we have 1TB of datastore or VM?
>>
>> Is there any specfic number that I must use and cannot use to mount the
>> datastore?
>>
>> How do i set the additional datastore?
>>
>>
>> Hope you can advise further.
>>
>> OpenNebula : 4.x
>> OpenNebula Sunstone : 192.168.8.10
>> Storage 1 / Datastore 1 : 192.168.8.11
>> Storage 2 / Datastore 2 : 192.168.8.12
>>
>> Your kind assistant is highly sought.
>>
>> Thanks you.
>>
>> Regards & Best Wishes,
>>
>>
>> *.: Amier Anis :.*
>>
>
>
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>


-- 
-- 
Join us at OpenNebulaConf2013 in Berlin, 24-26 September, 2013
-- 
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula
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