diff options
| author | loli10K <[email protected]> | 2019-02-08 21:32:12 +0100 |
|---|---|---|
| committer | Matthew Ahrens <[email protected]> | 2019-02-08 12:32:12 -0800 |
| commit | 4417096956f7439322c65d9e70a4526df45ea8d0 (patch) | |
| tree | 178e2f569132f796e7e724711be9a681671608c0 /man/man8 | |
| parent | 0902c4577f4ba2a3687549f7d5d19718a275fb52 (diff) | |
Pool allocation classes misplacing small file blocks
Due to an off-by-one condition in spa_preferred_class() we are picking
the "normal" allocation class instead of the "special" one for file
blocks with size equal to the special_small_blocks property value.
This change fix the small code issue, update the ZFS Test Suite and the
zfs(8) man page.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Don Brady <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes #8351
Closes #8361
Diffstat (limited to 'man/man8')
| -rw-r--r-- | man/man8/zfs.8 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/man/man8/zfs.8 b/man/man8/zfs.8 index be28f2b62..4658c5b8b 100644 --- a/man/man8/zfs.8 +++ b/man/man8/zfs.8 @@ -1521,9 +1521,11 @@ This feature must be enabled to be used .Pc . .It Sy special_small_blocks Ns = Ns Em size This value represents the threshold block size for including small file -blocks into the special allocation class. Valid values are zero or a -power of two from 512B up to 128K. The default size is 0 which means no -small file blocks will be allocated in the special class. +blocks into the special allocation class. Blocks smaller than or equal to this +value will be assigned to the special allocation class while greater blocks +will be assigned to the regular class. Valid values are zero or a power of two +from 512B up to 128K. The default size is 0 which means no small file blocks +will be allocated in the special class. .Pp Before setting this property, a special class vdev must be added to the pool. See |