[dm-devel] dm-cache: dirty state of blocks in writethrough mode

[Heinz Mauelshagen]

On 07/26/2013 04:45 AM, Kumar amit mehta wrote:
> On Thu, Jul 25, 2013 at 12:45:31PM +0200, Heinz Mauelshagen wrote:
>> You can set up a mirrored metadata device to be resilient against
>> SSD failures.
> Okay
>
>> Plus you can take metadata snapshots at arbitrary points in time;
>> see the targets kernel documentation in thin-provisioning.txt for this
>> and the recent thin_dump support metadata snapshots  in the rawhide
>> device-mapper-persistent-data package.
>>
> So these feature is already upstream and also in fedora 20, but not in
> Red Hat 6.4 yet ?

No, it's planned for RHEL7.

>
>> Either is subject to future LVM2 support and isn't supported as yet.
> So, if LVM2 doesn't support it as of now, Any idea if EVMS or any other
> volume Managers consume these features?

None that I'm aware of.

Use dmsetup for early testing.

We'll support it in LVM2 later in the year.

Heinz

>
> !!amit
>
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