raid5 - again
hi
It's been some two years since I read about the becoming of raid5 etc i= n btrfs. Since the code is available in linux, why isn't this already i= n btrfs? Is Oracle holding back?
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Vennlige hilsener / Best regards
roy
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2011/2/19 Roy Sigurd Karlsbakk <[email protected]>:
Quoted 3 lines
hi
It's been some two years since I read about the becoming of raid5 etc in btrfs. Since the code is available in linux,
Code of what? Raid5? Raid5 is some functionality that can't be easly ported to another project with different blocks management and structure.
Quoted 1 line
why isn't this already in btrfs? Is Oracle holding back?
IMO Raid5 in btrfs should be implemented from scratch.
[Sorry if I didn't understand you]
Regards,
Marcin Kuk
Quoted 1 line · Marcin Kuk
IMO Raid5 in btrfs should be implemented from scratch.
I believe Roy was referring to the development work that others were doing on raid5 in btrfs and was residing outside of Chris's trees.
However, as Hugo has pointed out, Chris is busy with getting a functional btrfsck going.
All the best,
Chris
Signature · 4 lines
Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. For more info see: http://en.wikipedia.org/wiki/OpenPGP
Quoted 3 lines · Roy Sigurd Karlsbakk
It's been some two years since I read about the becoming of raid5 etc in btrfs. Since the code is available in linux, why isn't this already in btrfs? Is Oracle holding back?
It's about resourcing and stability. Oracle only employ one person
(AFAIK) on btrfs -- Chris Mason. He does a sterling job of maintaining and developing the filesystem, but there is only one of him.
Since well before December, he's been working on a functional fsck,
trying to get it to a state where it won't demolish your filesystem even more than it already is. This has left the work to integrate the RAID-5/6 patches behind. He's also been working hard on fixing a great many other stability issues as they're reported, and integrating patches from other developers.
I believe that RAID-5/6 is the next major piece of work that Chris
is intending to integrate, once fsck is ready. However, stability is better than features at this point. I don't see any commercial benefit in preventing the integration and deployment of the RAID-5/6 patches, but simply that there's other things that are more important. Please be patient.
Hugo.
Signature · 3 lines
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Startle, startle, little twink. How I wonder what you think. ---