* Status of Tripe Parity RAID
@ 2014-08-02 8:11 Ronny Egner
2014-08-04 1:07 ` NeilBrown
2014-08-07 19:34 ` David Brown
0 siblings, 2 replies; 3+ messages in thread
From: Ronny Egner @ 2014-08-02 8:11 UTC (permalink / raw)
To: linux-raid
Dear All,
i would like to ask about the status of Tripe Parity RAID.
I´ve found some posts on the list from Andrea Mazzoleni dating back to
2013
but after that nothing seemed to be moving.
If this is currently not on the wish list i would like to add that as
Feature Request :-)
Thanks Neil for this great piece of software.
Mit freundlichen Grüßen
Ronny Egner
--
Ronny Egner
Oracle Certified Master 11g (OCM)
EMail: ronnyegner@ronnyegner-consulting.de
<mailto:roonnyegner@ronnyegner-consulting.de>
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Status of Tripe Parity RAID
2014-08-02 8:11 Status of Tripe Parity RAID Ronny Egner
@ 2014-08-04 1:07 ` NeilBrown
2014-08-07 19:34 ` David Brown
1 sibling, 0 replies; 3+ messages in thread
From: NeilBrown @ 2014-08-04 1:07 UTC (permalink / raw)
To: Ronny Egner; +Cc: linux-raid
[-- Attachment #1: Type: text/plain, Size: 1517 bytes --]
On Sat, 2 Aug 2014 08:11:31 +0000 Ronny Egner
<ronnyegner@ronnyegner-consulting.de> wrote:
> Dear All,
>
> i would like to ask about the status of Tripe Parity RAID.
>
> I´ve found some posts on the list from Andrea Mazzoleni dating back to
> 2013
> but after that nothing seemed to be moving.
>
> If this is currently not on the wish list i would like to add that as
> Feature Request :-)
If you want wishes fulfilled, you'll need to find a genie.
>
>
> Thanks Neil for this great piece of software.
Thanks, but of course it isn't just me.
RAID6 (i.e. double-parity raid) is a good case in point.
That was developed and tested and pushed by Peter Anvin, not at all by me.
I eventually merged his separate raid6main.c into raid5.c and then merged some
of the functions. So I did some "maintainer" stuff, but didn't do the
development. It is likely that Triple Parity RAID will only happen if
someone else steps up like Peter did, because I'm really not that interested.
So we don't need feature requests, we need code submissions.
NeilBrown
>
>
> Mit freundlichen Grüßen
> Ronny Egner
> --
> Ronny Egner
> Oracle Certified Master 11g (OCM)
>
> EMail: ronnyegner@ronnyegner-consulting.de
> <mailto:roonnyegner@ronnyegner-consulting.de>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 828 bytes --]
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Status of Tripe Parity RAID
2014-08-02 8:11 Status of Tripe Parity RAID Ronny Egner
2014-08-04 1:07 ` NeilBrown
@ 2014-08-07 19:34 ` David Brown
1 sibling, 0 replies; 3+ messages in thread
From: David Brown @ 2014-08-07 19:34 UTC (permalink / raw)
To: Ronny Egner, linux-raid
On 02/08/14 10:11, Ronny Egner wrote:
> Dear All,
>
> i would like to ask about the status of Tripe Parity RAID.
>
> I´ve found some posts on the list from Andrea Mazzoleni dating back to
> 2013
> but after that nothing seemed to be moving.
>
> If this is currently not on the wish list i would like to add that as
> Feature Request :-)
>
>
> Thanks Neil for this great piece of software.
>
I believe Andrea got the code working for doing the multiple parity raid
calculations, but I don't know how complete it is. I have looked at his
maths, and agree that it is solid - and I think the general opinion is
that he has found the best algorithms for the task (better than the one
I came up with, and better than the one used by ZFS for triple parity).
As far as I know, no work has been done on integrating this into the md
code itself, nor into the mdadm code.
As Neil says, we don't need a feature request on this - it is already
requested. We need someone who is able to spend the time putting it
together. The mathematical bit is in place, so it doesn't have to be a
person (or people) who understands that part so well.
David
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-08-07 19:34 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-08-02 8:11 Status of Tripe Parity RAID Ronny Egner
2014-08-04 1:07 ` NeilBrown
2014-08-07 19:34 ` David Brown
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.