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This patch adds a new top-level vdev type called dRAID, which stands
for Distributed parity RAID. This pool configuration allows all dRAID
vdevs to participate when rebuilding to a distributed hot spare device.
This can substantially reduce the total time required to restore full
parity to pool with a failed device.
A dRAID pool can be created using the new top-level `draid` type.
Like `raidz`, the desired redundancy is specified after the type:
`draid[1,2,3]`. No additional information is required to create the
pool and reasonable default values will be chosen based on the number
of child vdevs in the dRAID vdev.
zpool create <pool> draid[1,2,3] <vdevs...>
Unlike raidz, additional optional dRAID configuration values can be
provided as part of the draid type as colon separated values. This
allows administrators to fully specify a layout for either performance
or capacity reasons. The supported options include:
zpool create <pool> \
draid[<parity>][:<data>d][:<children>c][:<spares>s] \
<vdevs...>
- draid[parity] - Parity level (default 1)
- draid[:<data>d] - Data devices per group (default 8)
- draid[:<children>c] - Expected number of child vdevs
- draid[:<spares>s] - Distributed hot spares (default 0)
Abbreviated example `zpool status` output for a 68 disk dRAID pool
with two distributed spares using special allocation classes.
```
pool: tank
state: ONLINE
config:
NAME STATE READ WRITE CKSUM
slag7 ONLINE 0 0 0
draid2:8d:68c:2s-0 ONLINE 0 0 0
L0 ONLINE 0 0 0
L1 ONLINE 0 0 0
...
U25 ONLINE 0 0 0
U26 ONLINE 0 0 0
spare-53 ONLINE 0 0 0
U27 ONLINE 0 0 0
draid2-0-0 ONLINE 0 0 0
U28 ONLINE 0 0 0
U29 ONLINE 0 0 0
...
U42 ONLINE 0 0 0
U43 ONLINE 0 0 0
special
mirror-1 ONLINE 0 0 0
L5 ONLINE 0 0 0
U5 ONLINE 0 0 0
mirror-2 ONLINE 0 0 0
L6 ONLINE 0 0 0
U6 ONLINE 0 0 0
spares
draid2-0-0 INUSE currently in use
draid2-0-1 AVAIL
```
When adding test coverage for the new dRAID vdev type the following
options were added to the ztest command. These options are leverages
by zloop.sh to test a wide range of dRAID configurations.
-K draid|raidz|random - kind of RAID to test
-D <value> - dRAID data drives per group
-S <value> - dRAID distributed hot spares
-R <value> - RAID parity (raidz or dRAID)
The zpool_create, zpool_import, redundancy, replacement and fault
test groups have all been updated provide test coverage for the
dRAID feature.
Co-authored-by: Isaac Huang <he.huang@intel.com>
Co-authored-by: Mark Maybee <mmaybee@cray.com>
Co-authored-by: Don Brady <don.brady@delphix.com>
Co-authored-by: Matthew Ahrens <mahrens@delphix.com>
Co-authored-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Mark Maybee <mmaybee@cray.com>
Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10102
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| .. | ||
| .gitignore | ||
| fsck.zfs.8 | ||
| Makefile.am | ||
| mount.zfs.8 | ||
| vdev_id.8 | ||
| zdb.8 | ||
| zed.8.in | ||
| zfs_ids_to_path.8 | ||
| zfs-allow.8 | ||
| zfs-bookmark.8 | ||
| zfs-change-key.8 | ||
| zfs-clone.8 | ||
| zfs-create.8 | ||
| zfs-destroy.8 | ||
| zfs-diff.8 | ||
| zfs-get.8 | ||
| zfs-groupspace.8 | ||
| zfs-hold.8 | ||
| zfs-inherit.8 | ||
| zfs-jail.8 | ||
| zfs-list.8 | ||
| zfs-load-key.8 | ||
| zfs-mount-generator.8.in | ||
| zfs-mount.8 | ||
| zfs-program.8 | ||
| zfs-project.8 | ||
| zfs-projectspace.8 | ||
| zfs-promote.8 | ||
| zfs-receive.8 | ||
| zfs-recv.8 | ||
| zfs-redact.8 | ||
| zfs-release.8 | ||
| zfs-rename.8 | ||
| zfs-rollback.8 | ||
| zfs-send.8 | ||
| zfs-set.8 | ||
| zfs-share.8 | ||
| zfs-snapshot.8 | ||
| zfs-unallow.8 | ||
| zfs-unjail.8 | ||
| zfs-unload-key.8 | ||
| zfs-unmount.8 | ||
| zfs-upgrade.8 | ||
| zfs-userspace.8 | ||
| zfs-wait.8 | ||
| zfs.8 | ||
| zfsconcepts.8 | ||
| zfsprops.8 | ||
| zgenhostid.8 | ||
| zinject.8 | ||
| zpool_influxdb.8 | ||
| zpool-add.8 | ||
| zpool-attach.8 | ||
| zpool-checkpoint.8 | ||
| zpool-clear.8 | ||
| zpool-create.8 | ||
| zpool-destroy.8 | ||
| zpool-detach.8 | ||
| zpool-events.8 | ||
| zpool-export.8 | ||
| zpool-get.8 | ||
| zpool-history.8 | ||
| zpool-import.8 | ||
| zpool-initialize.8 | ||
| zpool-iostat.8 | ||
| zpool-labelclear.8 | ||
| zpool-list.8 | ||
| zpool-offline.8 | ||
| zpool-online.8 | ||
| zpool-reguid.8 | ||
| zpool-remove.8 | ||
| zpool-reopen.8 | ||
| zpool-replace.8 | ||
| zpool-resilver.8 | ||
| zpool-scrub.8 | ||
| zpool-set.8 | ||
| zpool-split.8 | ||
| zpool-status.8 | ||
| zpool-sync.8 | ||
| zpool-trim.8 | ||
| zpool-upgrade.8 | ||
| zpool-wait.8 | ||
| zpool.8 | ||
| zpoolconcepts.8 | ||
| zpoolprops.8 | ||
| zstream.8 | ||
| zstreamdump.8 | ||