[ovirt-users] Shrinking a storage domain

[Nir Soffer]

On Fri, Feb 26, 2016 at 5:31 PM, Troels Arvin <troels at arvin.dk> wrote:

> Hello,
>
> I'm moving some storage from one SAN storage unit to another SAN storage
> unit (i.e.: block device storage). So I have two RHEV storage domains:
>
> SD1
> SD2
>
> We need to move most of SD1s data to SD2.
>
> Live storage migration for a guest works fine: It's easy to migrate a
> disk from being in SD1 to SD2.
>
> But now that I have released around half of SD1, I would like to let go
> of a LUN which is part of SD1. How is that done?


Sorry, this is not supported.

Your only option is to move all disks from SD1, remove SD1, and recreate it.


> (If this were a stand-
> alone Linux box, I would use vgreduce to release a PV and then remove the
> PV from the server.)
>

This should work on our vgs, but:
- It may move lvs from this pv to another pv, breaking our metadata
  (stored in the metadata lv)
- Engine will have stale pvs for this vg, this may break your setup

If this feature is important for your, please file a bug and explain the
use case,
so we can consider this for future versions.

Nir


>
> --
> Regards,
> Troels Arvin
>
>
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>
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