%B

@@ -23,10 +23,11 @@
 .\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
 .\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
 .\" Copyright (c) 2012 by Delphix. All rights reserved.
 .\" Copyright (c) 2012, Joyent, Inc. All rights reserved.
 .\" Copyright 2012 Nexenta Systems, Inc. All Rights Reserved.
+.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
 .\"
 .TH ZFS 1M "Sep 16, 2012"
 .SH NAME
 zfs \- configures ZFS file systems
 .SH SYNOPSIS

@@ -910,11 +911,11 @@
 
 .sp
 .ne 2
 .na
 \fB\fBcompression\fR=\fBon\fR | \fBoff\fR | \fBlzjb\fR | \fBgzip\fR |
-\fBgzip-\fR\fIN\fR | \fBzle\fR\fR
+\fBgzip-\fR\fIN\fR | \fBzle\fR\fR | \fBlz4\fR | \fBlz4hc\fR
 .ad
 .sp .6
 .RS 4n
 Controls the compression algorithm used for this dataset. The \fBlzjb\fR
 compression algorithm is optimized for performance while providing decent data

@@ -924,10 +925,21 @@
 value \fBgzip-\fR\fIN\fR where \fIN\fR is an integer from 1 (fastest) to 9
 (best compression ratio). Currently, \fBgzip\fR is equivalent to \fBgzip-6\fR
 (which is also the default for \fBgzip\fR(1)). The \fBzle\fR compression
 algorithm compresses runs of zeros.
 .sp
+The \fBlz4\fR compression algorithm is a high-performance replacement
+for the \fBlzjb\fR algorithm. It features significantly faster
+compression and decompression, as well as a moderately higher
+compression ratio than \fBlzjb\fR, but can only be used on pools with
+the \fBlz4_compress\fR feature set to \fIenabled\fR. See
+\fBzpool-features\fR(5) for details on ZFS feature flags and the
+\fBlz4_compress\fR feature. The \fBlz4hc\fR algorithm is a
+high-compression variant of \fBlz4\fR. It provides compression ratios
+and compression speeds comparable to gzip, but much faster decompression
+(same as \fBlz4\fR).
+.sp
 This property can also be referred to by its shortened column name
 \fBcompress\fR. Changing this property affects only newly-written data.
 .RE
 
 .sp