Xen users - Mar 2009 - Mount shared block-device: Iscsi? Or GNBD? Or CLVM? Or EVMS? It''s a hell...

Hello list,

I "just" want to mount a drbd-partition on both sides in
primary-primary.

Doing this brings up drbd with a disconnect while migrating a VM telling me
"drbd0: split-brain detected: disconneting".
So far so good...

Now, what i DON'T want is some kind of file-based images, like sparse-files
on ocfs2 or GFS. I want directly mount the blockdevice on both sides, so i need
some kind of locking mechanism for shared mounted block devices!

AFAIK this can be done with ISCSI or GNBD or CLVM or perhaps EVMS?

But what will REALLY do the trick? All of them?

Aim is, that i never can get parallel write-access on the block-devices and that
performance is ok.

Any recommondations?

Kind regards, Florian
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I''m on the same situation than you...  That''s why now I
learning about
OpenSolaris 2008.11 and its ZFS file system... its awesome!

 My dom0 is Debian Lenny with packaged Xen, my partitions are: /dev/sda1
256M on /boot and /dev/sda2 2G on /root;

 My first domU is OpenSolaris 2008.11 controlling all the rest of the disc
(498G of my /dev/sda3);

 So now I''m learning in how to share via ZFS native commands, my POOL
to any
other Linux domUs thats lives in another hypervisores on the network...

If you like it, help me! I''m totally newbie with Solaris... but maybe
my
idea is good!

I''m even thinking about enabling OpenSolaris 2008.11 as dom0 to enjoy
the
ZFS! But this is still only a possibility.

Regards,
Thiago

2009/3/4 Rustedt, Florian <Florian.Rustedt@smartnet.de>
> Hello list,
>
> I "just" want to mount a drbd-partition on both sides in
primary-primary.
>
> Doing this brings up drbd with a disconnect while migrating a VM telling me
> "drbd0: split-brain detected: disconneting".
> So far so good...
>
> Now, what i DON''T want is some kind of file-based images, like
sparse-files
> on ocfs2 or GFS. I want directly mount the blockdevice on both sides, so i
> need some kind of locking mechanism for shared mounted block devices!
>
> AFAIK this can be done with ISCSI or GNBD or CLVM or perhaps EVMS?
>
> But what will REALLY do the trick? All of them?
>
> Aim is, that i never can get parallel write-access on the block-devices and
> that performance is ok.
>
> Any recommondations?
>
> Kind regards, Florian
>
>
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> IMPORTANT: The contents of this email and any attachments are confidential.
> They are intended for the
> named recipient(s) only.
> If you have received this email in error, please notify the system manager
> or the sender immediately and do
> not disclose the contents to anyone or make copies thereof.
> *** eSafe scanned this email for viruses, vandals, and malicious content.
> ***
>
>
**********************************************************************************************
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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