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



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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