RFC ore: raid6
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- v1 RFC Latest3 patches 4 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | ore: (trivial) reformat some codefs/ fs/ | +9 | 3 replies | |
| 2/3 | ore: Remove redundant dev_order(), more cleanupsfs/ fs/ fs/ | +10 | 0 replies | |
| 3/3 | ore: Support for raid 6fs/ fs/ fs/ +1 more | +81 | 0 replies |
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Cover letter [RFC 0/3] ore: raid6
Hi all
proud to present some experimentation with raid6 in ORE.
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.
Very RFC right now. Only lightly tested. Git clone linux and compile. Only a very few parameters tested:
group_width=5 && group_width=6 s_unit=4*PAGES && s_unit=1*PAGE
Please have a try, report all the crashes.
In the next iteration I would like to add some raid6-math documentation which I think is needed for completeness.
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