On 12/18/2017 09:28 AM, Scott Bauer wrote: > This device mapper module remaps and unstripes IO so it lands > solely on a single drive in a RAID 0/dm-stripe target. > In a 4 drive RAID 0 the mapper exposes 1/4th of the LBA range > as a virtual drive. Each IO to that virtual drive will land on > only one of the 4 drives, selected by the user. > > Signed-off-by: Scott Bauer <scott.bauer@xxxxxxxxx> > Acked-by: Keith Busch <keith.busch@xxxxxxxxx> > --- > drivers/md/Kconfig | 10 +++ > drivers/md/Makefile | 1 + > drivers/md/dm-unstripe.c | 204 +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 215 insertions(+) > create mode 100644 drivers/md/dm-unstripe.c > > diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig > index 83b9362be09c..e1c48a7f98f1 100644 > --- a/drivers/md/Kconfig > +++ b/drivers/md/Kconfig > @@ -269,6 +269,16 @@ config DM_BIO_PRISON > > source "drivers/md/persistent-data/Kconfig" > > +config DM_UN_STRIPE > + tristate "Transpose IO to individual drives on a raid device" > + depends on BLK_DEV_DM > + ---help--- > + Enable this feature if you with to unstripe I/O on a RAID 0 > + device to the respective drive. If your hardware has physical > + RAID 0 this module can unstripe the I/O to respective sides. What does "sides" mean above? > + > + If unsure say N. > + thanks, -- ~Randy -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
