From: "DJ TweeQ" <djtweeq@hotmail.com>
Subject: [linux-lvm] RE: Sharing LVM's via NFS on Redhat 8.0 (nice clarification)
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Date: Fri Feb 21 15:17:02 2003
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To: linux-lvm@sistina.com

Thanks Patrick...nice clarification and more than helpfull visual 
description :) Hey Sistina...wouldn't be such a bad idea to add that one to 
the sharing LV's/dangerous operations section on the HOWTO. :)

>Sharing over NFS is fine. What you are doing with NFS is sharing the 
> >filesystem.
>The dangerous behaviour mentioned is when you are sharing the actual >block
>device that is the LV. A subtle but very important distinction.

>This is safe:
>
>+----+   NFS   +---------+
>|    |---------|  Box B  |
>|boxA|         |         | +----+         +---------+                    | 
>SCSI/IDE/FC
>                    |
>		  ^^^^^^^
>		  |disks|
>		  |     |
>		  |     |
>		  |     |
>		  ^^^^^^^
>		  		  This is dangerous:
>
>+----+         +----+
>|    |         |    |
>|boxA|         |boxB| +----+         +----+      \       /       ^^^^^^^
>       |disks|
>       |     |
>       |     |
>       |     |
>       ^^^^^^^
>
>
>
>patrick
>









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