Document the zle compression algorithm

Signed-off-by: Richard Laager <rlaager@wiktel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

diff --git a/man/man8/zfs.8 b/man/man8/zfs.8
index 26dc6ca..d237269 100644 (file)
--- a/man/man8/zfs.8
+++ b/man/man8/zfs.8
@@ -660,11 +660,15 @@ Changing this property affects only newly-written data.
 .ne 2
 .mk
 .na
-\fB\fBcompression\fR=\fBon\fR | \fBoff\fR | \fBlzjb\fR | \fBgzip\fR | \fBgzip-\fR\fIN\fR\fR
+\fBcompression\fR=\fBon\fR | \fBoff\fR | \fBlzjb\fR | \fBgzip\fR | \fBgzip-\fR\fIN\fR | \fBzle\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 compression. Setting compression to \fBon\fR uses the \fBlzjb\fR compression algorithm. The \fBgzip\fR compression algorithm uses the same compression as the \fBgzip\fR(1) command. You can specify the \fBgzip\fR level by using the 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)).
+Controls the compression algorithm used for this dataset. The \fBlzjb\fR compression algorithm is optimized for performance while providing decent data compression. Setting compression to \fBon\fR uses the \fBlzjb\fR compression algorithm.
+.sp
+The \fBgzip\fR compression algorithm uses the same compression as the \fBgzip\fR(1) command. You can specify the \fBgzip\fR level by using the 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)).
+.sp
+The \fBzle\fR (zero-length encoding) compression algorithm is a fast and simple algorithm to eliminate runs of zeroes.
 .sp
 This property can also be referred to by its shortened column name \fBcompress\fR. Changing this property affects only newly-written data.
 .RE