[linux-lvm] RE: Sharing LVM's via NFS on Redhat 8.0 (nice clarification)

["DJ TweeQ" <djtweeq@hotmail.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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