ore: raid6
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- v1 Latest2 of 3 patches 0 repliesNew
changes since RFC from the cover letter
Nothing changed. one checkpatch fix. And this time all patches actually compile (thanks to Tigran)
2 of 3 patches are in this archive. The cover letter announces 3.
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | ore: (trivial) reformat some codefs/ fs/ | +9 | 0 replies | |
| 3/3 | ore: Support for raid 6fs/ fs/ fs/ +1 more | +80 | 0 replies |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.
Cover letter [PACHSET 0/3] ore: raid6
Hi all
proud to present support for raid6 in ORE.
changes since RFC:
Nothing changed. one checkpatch fix. And this time all patches actually compile (thanks to Tigran)
I have by now tested better. RAID6 code was not actually tested heavily but RAID5 was, and there are no known regressions to RAID5 so I'm pushing this for next merge.
.I.E: Yes I did run all tests on RAID6 but user-mode utils do not support
scrubbing and checking of RAID6 yet. So I'm not confident that it is 100% cosher. But I do have a XOR checker and RAID5 is just as good as current code. So I'm pushing this now and any RAID6 specific problems can be fixed when they are found.
These simple patches will enable raid6 using the Kernel's raid6_pq engine for support under exofs and pnfs-objects. There is nothing needed to do at exofs and pnfs-obj. Just fire your mkfs.exofs with --raid=6 (that was already supported before) and off you go as usual. The ORE will pick up the new map and will start writing two devices of redundancy bits. Including the pNFS server code and pnfs-export bits at exofs, they all work supporting raid6 without any code modifications.
I want to deeply thank Daniel Gryniewicz who found first all the bugs in the old raid code, and inspired these patches.
list of patches:
[PATCH 1/4] ore: (trivial) reformat some code [PATCH 2/4] ore: Remove redundant dev_order(), more cleanups [PATCH 3/4] ore: Support for raid 6
Cheers
Boaz
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