diff options
| author | Matthew Ahrens <[email protected]> | 2014-11-03 12:15:08 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-05-11 12:23:16 -0700 |
| commit | f1512ee61e2f22186ac16481a09d86112b2d6788 (patch) | |
| tree | 6098f841f27955f13d4c2a53b2a4826b5f3bacda /module/zcommon/zfs_prop.c | |
| parent | 3df293404a102398445fc013b67250073db9004e (diff) | |
Illumos 5027 - zfs large block support
5027 zfs large block support
Reviewed by: Alek Pinchuk <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Josef 'Jeff' Sipek <[email protected]>
Reviewed by: Richard Elling <[email protected]>
Reviewed by: Saso Kiselkov <[email protected]>
Reviewed by: Brian Behlendorf <[email protected]>
Approved by: Dan McDonald <[email protected]>
References:
https://www.illumos.org/issues/5027
https://github.com/illumos/illumos-gate/commit/b515258
Porting Notes:
* Included in this patch is a tiny ISP2() cleanup in zio_init() from
Illumos 5255.
* Unlike the upstream Illumos commit this patch does not impose an
arbitrary 128K block size limit on volumes. Volumes, like filesystems,
are limited by the zfs_max_recordsize=1M module option.
* By default the maximum record size is limited to 1M by the module
option zfs_max_recordsize. This value may be safely increased up to
16M which is the largest block size supported by the on-disk format.
At the moment, 1M blocks clearly offer a significant performance
improvement but the benefits of going beyond this for the majority
of workloads are less clear.
* The illumos version of this patch increased DMU_MAX_ACCESS to 32M.
This was determined not to be large enough when using 16M blocks
because the zfs_make_xattrdir() function will fail (EFBIG) when
assigning a TX. This was immediately observed under Linux because
all newly created files must have a security xattr created and
that was failing. Therefore, we've set DMU_MAX_ACCESS to 64M.
* On 32-bit platforms a hard limit of 1M is set for blocks due
to the limited virtual address space. We should be able to relax
this one the ABD patches are merged.
Ported-by: Brian Behlendorf <[email protected]>
Closes #354
Diffstat (limited to 'module/zcommon/zfs_prop.c')
| -rw-r--r-- | module/zcommon/zfs_prop.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/module/zcommon/zfs_prop.c b/module/zcommon/zfs_prop.c index 70f1d93df..aaebab444 100644 --- a/module/zcommon/zfs_prop.c +++ b/module/zcommon/zfs_prop.c @@ -426,8 +426,8 @@ zfs_prop_init(void) /* inherit number properties */ zprop_register_number(ZFS_PROP_RECORDSIZE, "recordsize", - SPA_MAXBLOCKSIZE, PROP_INHERIT, - ZFS_TYPE_FILESYSTEM, "512 to 128k, power of 2", "RECSIZE"); + SPA_OLD_MAXBLOCKSIZE, PROP_INHERIT, + ZFS_TYPE_FILESYSTEM, "512 to 1M, power of 2", "RECSIZE"); /* hidden properties */ zprop_register_hidden(ZFS_PROP_CREATETXG, "createtxg", PROP_TYPE_NUMBER, |