RE: [Xen-users] how to mount one volume to 2 guests

[Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>]

No, that’s not true.  OCFS2 is a distributed block locking mechanism specifically built to allow multiple systems to simultaneously access the same block device.

 

Best Regards

Nathan Eisenberg

Sr. Systems Administrator

Atlas Networks, LLC

support@xxxxxxxxxxxxxxxx

http://support.atlasnetworks.us/portal

 

From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Alain Barthe
Sent: Wednesday, June 03, 2009 9:54 AM
To: nikolanikov@xxxxxxx
Cc: Fajar A. Nugraha; Xen User-List
Subject: Re: [Xen-users] how to mount one volume to 2 guests

 

 

2009/6/2 <nikolanikov@xxxxxxx>

 
Yes I realize that, I want to use it with ocfs2. How I can set mode to w! ?

I am not sure to understand, but OCFS2 is a file system. If you want to use it, I think you have to create a disk image file on your ocfs2 file system, then to use the "file:" or "tap:io:" prefix in your domU config files.

You can't use directly a shared physical device, even if you created OCFS2 file systems on it.
 

 
Цитат от "Fajar A. Nugraha" <fajar@xxxxxxxxx>:

> 009/6/1  <nikolanikov@xxxxxxx>:
>> I want to ask how to mount one storage device to 2 guests?
>> When I try to create vm handle everything is fine I can create one vdi and
>> vbds for every guest. When I start first machine everything is ok, but when
>> I try to start second one it says that
>>
>> ERROR: 2 INTERNAL_ERROR Device 2051 (vbd) could not be connected.
>> Device /dev/mapper/test_vg-test64_454 is mounted in a guest domain,
>> and so cannot be mounted now.
>>
>> any Ideas how I can share one device to two or more virtual machines? I
>> don't want network solution like nfs,iscsi ... etc
>
> First of all, you DO realize that sharing a block device without some
> kind of cluster file system could lead to data corruption?
>
> If you want to share it anyway, you can try changing the mode to "r"
> (for read only) or "w!" (to force read-write multiple mount).
>
> --
> Fajar
>
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> Xen-users mailing list
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>
>

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