From 62bdd5eb7a35288cc25c5ae968bcd0f08889f986 Mon Sep 17 00:00:00 2001 From: Daniil Lunev Date: Sat, 18 Oct 2014 11:58:11 -0400 Subject: Illumos 4924 - LZ4 Compression for metadata Reviewed by Matthew Ahrens Reviewed by Saso Kiselkov Approved by: Christopher Siden References: https://github.com/illumos/illumos-gate/commit/b8289d2 https://www.illumos.org/issues/3756 Porting notes: The static function zfs_prop_activate_feature() was removed because this change removes the only caller. The function was not removed from Illumos but instead left as dead code. However, to keep gcc happy it was removed from Linux and may be easily restored if needed. Ported by: DHE Signed-off-by: Brian Behlendorf Closes #1540 --- man/man5/zpool-features.5 | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'man') diff --git a/man/man5/zpool-features.5 b/man/man5/zpool-features.5 index ff8313bf5..d80bb02ba 100644 --- a/man/man5/zpool-features.5 +++ b/man/man5/zpool-features.5 @@ -223,11 +223,14 @@ When the \fBlz4_compress\fR feature is set to \fBenabled\fR, the administrator can turn on \fBlz4\fR compression on any dataset on the pool using the \fBzfs\fR(8) command. Please note that doing so will immediately activate the \fBlz4_compress\fR feature on the underlying -pool (even before any data is written), and the feature will not be -deactivated. Since this feature is not read-only compatible, this -operation will render the pool unimportable on systems without support -for the \fBlz4_compress\fR feature. Booting off of \fBlz4\fR-compressed -root pools is supported. +pool using the \fBzfs\fR(1M) command. Also, all newly written metadata +will be compressed with \fBlz4\fR algorithm. Since this feature is not +read-only compatible, this operation will render the pool unimportable +on systems without support for the \fBlz4_compress\fR feature. Booting +off of \fBlz4\fR-compressed root pools is supported. + +This feature becomes \fBactive\fR as soon as it is enabled and will +never return to being \fBenabled\fB. .RE .sp -- cgit v1.2.3