freebsd/sys/cddl/boot/zfs/README

$FreeBSD$

This directory contains various files derived from CDDL sources that
are used by the ZFS bootstrap:

    fletcher.c			checksum support
    sha256.c			checksum support
    lzjb.c			compression support
    zfssubr.c			mostly checksum and compression support
    zfsimpl.h			mostly describing the physical layout

The files fletcher.c, lzjb.c and sha256.c are largely identical to the
ZFS base code (with write support removed) and could be shared but
that might complicate future imports from OpenSolaris.
Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes. This bring huge amount of changes, I'll enumerate only user-visible changes: - Delegated Administration Allows regular users to perform ZFS operations, like file system creation, snapshot creation, etc. - L2ARC Level 2 cache for ZFS - allows to use additional disks for cache. Huge performance improvements mostly for random read of mostly static content. - slog Allow to use additional disks for ZFS Intent Log to speed up operations like fsync(2). - vfs.zfs.super_owner Allows regular users to perform privileged operations on files stored on ZFS file systems owned by him. Very careful with this one. - chflags(2) Not all the flags are supported. This still needs work. - ZFSBoot Support to boot off of ZFS pool. Not finished, AFAIK. Submitted by: dfr - Snapshot properties - New failure modes Before if write requested failed, system paniced. Now one can select from one of three failure modes: - panic - panic on write error - wait - wait for disk to reappear - continue - serve read requests if possible, block write requests - Refquota, refreservation properties Just quota and reservation properties, but don't count space consumed by children file systems, clones and snapshots. - Sparse volumes ZVOLs that don't reserve space in the pool. - External attributes Compatible with extattr(2). - NFSv4-ACLs Not sure about the status, might not be complete yet. Submitted by: trasz - Creation-time properties - Regression tests for zpool(8) command. Obtained from: OpenSolaris 2008-11-17 20:49:29 +00:00			$FreeBSD$

			`This directory contains various files derived from CDDL sources that`
			`are used by the ZFS bootstrap:`

			`fletcher.c checksum support`
			`sha256.c checksum support`
			`lzjb.c compression support`
			`zfssubr.c mostly checksum and compression support`
			`zfsimpl.h mostly describing the physical layout`

			`The files fletcher.c, lzjb.c and sha256.c are largely identical to the`
			`ZFS base code (with write support removed) and could be shared but`
			`that might complicate future imports from OpenSolaris.`