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Distributed Spare (dRAID) Feature

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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
This commit is contained in:
Brian Behlendorf
2020-11-13 13:51:51 -08:00
committed by GitHub
parent a724db0374
commit b2255edcc0
153 changed files with 10203 additions and 1882 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/runfiles/common.run
+8 -4
View File
@@ -333,6 +333,8 @@ tests = ['zpool_create_001_pos', 'zpool_create_002_pos',
'zpool_create_020_pos', 'zpool_create_021_pos', 'zpool_create_022_pos',
'zpool_create_023_neg', 'zpool_create_024_pos',
'zpool_create_encrypted', 'zpool_create_crypt_combos',
'zpool_create_draid_001_pos', 'zpool_create_draid_002_pos',
'zpool_create_draid_003_pos', 'zpool_create_draid_004_pos',
'zpool_create_features_001_pos', 'zpool_create_features_002_pos',
'zpool_create_features_003_pos', 'zpool_create_features_004_neg',
'zpool_create_features_005_pos',
@@ -375,7 +377,7 @@ tests = ['zpool_import_001_pos', 'zpool_import_002_pos',
'zpool_import_006_pos', 'zpool_import_007_pos', 'zpool_import_008_pos',
'zpool_import_009_neg', 'zpool_import_010_pos', 'zpool_import_011_neg',
'zpool_import_012_pos', 'zpool_import_013_neg', 'zpool_import_014_pos',
'zpool_import_015_pos',
'zpool_import_015_pos', 'zpool_import_016_pos', 'zpool_import_017_pos',
'zpool_import_features_001_pos', 'zpool_import_features_002_neg',
'zpool_import_features_003_pos', 'zpool_import_missing_001_pos',
'zpool_import_missing_002_pos', 'zpool_import_missing_003_pos',
@@ -710,12 +712,14 @@ tests = ['redacted_compressed', 'redacted_contents', 'redacted_deleted',
tags = ['functional', 'redacted_send']
[tests/functional/raidz]
tests = ['raidz_001_neg', 'raidz_002_pos']
tests = ['raidz_001_neg', 'raidz_002_pos', 'raidz_003_pos', 'raidz_004_pos']
tags = ['functional', 'raidz']
[tests/functional/redundancy]
tests = ['redundancy_001_pos', 'redundancy_002_pos', 'redundancy_003_pos',
'redundancy_004_neg']
tests = ['redundancy_draid1', 'redundancy_draid2', 'redundancy_draid3',
'redundancy_draid_spare1', 'redundancy_draid_spare2',
'redundancy_draid_spare3', 'redundancy_mirror', 'redundancy_raidz1',
'redundancy_raidz2', 'redundancy_raidz3', 'redundancy_stripe']
tags = ['functional', 'redundancy']
[tests/functional/refquota]