1ad38ed4f0
ZFS large block support. The default recordsize remains at 128KB.
A new tunable/sysctl variable, vfs.zfs.max_recordsize is added to
allow adjusting the permitted maximum record size, or
zfs_max_recordsize, with a default of 1MB. ZFS will not allow
setting recordsize greater than zfs_max_recordsize as a safety
belt, because larger recordsize means greater read and write
latency and more memory usage.
Please note that booting from datasets that have recordsize greater
than 128KB is not supported (but it's Okay to enable the feature on
the pool).
Limited safety belt is provided for mounted root filesystem but use
caution when using a larger value.
Illumos issue:
5027 zfs large block support
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|---|---|---|
| .. | ||
| blkptr.c | ||
| fletcher.c | ||
| lz4.c | ||
| lzjb.c | ||
| README | ||
| sha256.c | ||
| zfsimpl.h | ||
| zfssubr.c | ||
| zle.c | ||
$FreeBSD$
This directory contains various files derived from CDDL sources that
are used by the ZFS bootstrap:
fletcher.c checksum support
sha256.c checksum support
lz4.c compression support
lzjb.c compression support
blkptr.c ZFS embedded-data block pointers support
zfssubr.c checksum, compression and raidz support
zfsimpl.h mostly describing the physical layout
The files fletcher.c, lzjb.c, lz4.c, sha256.c and blkptr.c are largely identical
to the ZFS base code (with write support removed) and could be shared but that
might complicate future imports from Illumos.