c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 10:37:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

Introduce ZFS module parameter l2arc_mfuonly

Browse Source 
In certain workloads it may be beneficial to reduce wear of L2ARC
devices by not caching MRU metadata and data into L2ARC. This commit
introduces a new tunable l2arc_mfuonly for this purpose.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #10710
This commit is contained in:
George Amanakis
2020-09-08 14:44:37 -04:00
committed by GitHub
parent ebc4b52369
commit feb3a7eef1
2 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
man/man5/zfs-module-parameters.5
+16
View File
@@ -198,6 +198,22 @@ feature.
Default value: \fB200\fR%.
.RE
.sp
.ne 2
.na
\fBl2arc_mfuonly\fR (int)
.ad
.RS 12n
Controls whether only MFU metadata and data are cached from ARC into L2ARC.
This may be desired to avoid wasting space on L2ARC when reading/writing large
amounts of data that are not expected to be accessed more than once. The
default is \fB0\fR, meaning both MRU and MFU data and metadata are cached.
When turning off (\fB0\fR) this feature some MRU buffers will still be present
in ARC and eventually cached on L2ARC.
.sp
Use \fB0\fR for no (default) and \fB1\fR for yes.
.RE
.sp
.ne 2
.na