[Linux-cluster] Cross mount of block devices on 2 nodes

[Kaloyan Kovachev]

Hi,

On Sun, 04 Jul 2010 19:24:03 +0400, AlannY <m at alanny.ru> wrote:
> Hi there. I'm new in clustering, so I have a question.
> 
> I have 2 nodes. For example, ONE and TWO. On ONE, I can export disk
block
> device
> (via GNBD or iSCSI) to TWO. On TWO, I can export another disk block
device
> and import
> it in ONE.
> 
> Some, ASCII art:
> 
>   +-------------+          +-----------+
>   | ONE +-------+          | TWO       |
>   |     | disk1 | -------> |           |
>   |     +-------+          +-------+   |
>   |             | <------- | disk2 |   |
>   |             |          +-------+   |
>   +-------------+          +-------+---+
> 
> Is it possible? Can I append this 2 block devices in one LVM volume
group?
> Can I format this volume group in GFS2 (or any other cluster
filesystem)?
> 

Yes, it is possible, but i guess you want to make a mirror between the two
... take a look at DRBD in this case

> Is there any pros and cons for this method?
> 

It depends on your usage case, but you haven't provided any info about it.

> Thanks for patience.
> 
> P.S. I'm not dumb, just newbie.
> 
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