MD: a caching layer for raid5/6
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b4 am [email protected]Versions newest first
- v3 Latest0 of 8 patches 0 repliesNew
Changes in v3 from the cover letter
-make reclaim multi-thread
-add statistics in sysfs
-bug fixes
Patches in v3 No applies recorded yet
None of the 8 patches the cover letter announces are in this archive.
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v3 yet.
Cover letter Fwd: [PATCH v3 0/8] MD: a caching layer for raid5/6
Sorry for intruding on the patch reviewing process and for the novice question.
Is this caching layer also suitable for a smaller system with only one raid5 where /boot and / resides? Or is it meant for dedicated data storage(s) only?
Regards
Davor Vusir
-------- Vidarebefordrat meddelande --------
Ämne: [PATCH v3 0/8] MD: a caching layer for raid5/6
Datum: Wed, 3 Jun 2015 15:48:35 -0700
Från: Shaohua Li <[email protected]>
Till: [email protected]
Kopia: [email protected], [email protected], [email protected], [email protected], [email protected]
Hi,
This is the third version of the raid5/6 caching layer patches. The patches add a caching layer for raid5/6. The caching layer uses a SSD as a cache for a raid 5/6. It works like the similar way of a hardware raid controller. The purpose is to improve raid performance (reduce read-modify-write) and fix write hole issue. The main patch is patch 3 and the description has all details about the implementation. Please review!
Thanks,
Shaohua
V3:
-make reclaim multi-thread
-add statistics in sysfs
-bug fixes
V2:
-metadata write doesn't use FUA
-discard request is only issued when necessary
-bug fixes and cleanup
Shaohua Li (7):
raid5: directly use mddev->queue
raid5: A caching layer for RAID5/6
raid5: add some sysfs entries
md: don't allow resize/reshape with cache support
raid5: skip resync if caching is enabled
raid5: guarantee cache release stripes in correct way
raid5: multi-thread support for raid5 caching reclaim
Song Liu (1):
MD: add a new disk role to present cache device
drivers/md/Makefile | 2 +- drivers/md/md.c | 14 +- drivers/md/md.h | 4 + drivers/md/raid5-cache.c | 3775 ++++++++++++++++++++++++++++++++++++++++ drivers/md/raid5.c | 177 +- drivers/md/raid5.h | 25 +- include/uapi/linux/raid/md_p.h | 73 + 7 files changed, 4022 insertions(+), 48 deletions(-) create mode 100644 drivers/md/raid5-cache.c
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