[linux-lvm] thin discards

[Raymond Jennings]

As a pure matter of opinion, I enjoy "fat provisioning" on my filesystems,
since I run a desktop and in theory it really cuts down on physical
fragmentation.

Snapshots are something I use whenever I need to make a fundamental
reconfiguration to the system as a whole that can't be done live, such as
resizing or reconfiguring the root filesystem.

This would preclude the unquestionable usage of thin volumes.



On Mon, Jul 22, 2013 at 3:16 AM, Zdenek Kabelac <zkabelac at redhat.com> wrote:

> Dne 22.7.2013 12:12, Raymond Jennings napsal(a):
>
>  I tried to run a fstrim on a mounted snapshot (regular snapshot, not thin
>> snapshot) and got zip.
>>
>>
> I've been talking about  thin snapshots.
>
> Of course - for old non-thin snapshot - TRIM is not supported.
> (And it doesn't look like anything simple to implement)
>
> Zdenek
>
>
>
>>
>> On Mon, Jul 22, 2013 at 2:47 AM, Zdenek Kabelac <zkabelac at redhat.com
>> <mailto:zkabelac at redhat.com>> wrote:
>>
>>     Dne 21.7.2013 21:40, Zdenek Kabelac napsal(a):
>>
>>         Dne 21.7.2013 13:01, Raymond Jennings napsal(a):
>>
>>             Do snapshots behave the same way as thin volumes wrt discards?
>>
>>
>>     Yes, snapshots are just like any other thin volumes.
>>
>>     Just a side note - until I think 3.9 kernel there used to be
>>     bug, which had wrong ref-counting of shared blocks.
>>
>>     Zdenek
>>
>>
>>
>
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