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Adam D. Moss 666aa69f32
Non-l2arc pool reads shouldn't be l2arc misses 
The current l2_misses accounting behavior treats all reads to pools 
without a configured l2arc as an l2arc miss, IFF there is at least 
one other pool on the system which does have an l2arc configured.

This makes it extremely hard to tune for an improved l2arc hit/miss 
ratio because this ratio will be modulated by reads from pools which 
do not (and should not) have l2arc devices; its upper limit will 
depend on the ratio of reads from l2arc'd pools and non-l2arc'd pools.

This PR prevents ARC reads affecting l2arc stats (n.b. l2_misses is 
the only relevant one) where the target spa doesn't have an l2arc.

Includes new test - l2arc_l2miss_pos.ksh

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Adam Moss <c@yotes.com>
Closes #10921
2020-10-20 11:39:52 -07:00
.github Document branching structure 2020-09-28 13:23:49 -07:00
cmd zed syslog entries drop important info 2020-10-19 11:01:00 -07:00
config blkg_tryget config test: initialize struct 2020-10-13 16:36:36 -07:00
contrib Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
etc Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
include Cross-platform acltype 2020-10-13 21:25:48 -07:00
lib Cross-platform acltype 2020-10-13 21:25:48 -07:00
man Cross-platform acltype 2020-10-13 21:25:48 -07:00
module Non-l2arc pool reads shouldn't be l2arc misses 2020-10-20 11:39:52 -07:00
rpm Add zpool_influxdb command 2020-10-09 09:29:21 -07:00
scripts Fix commitcheck on FreeBSD 2020-10-20 08:35:53 -07:00
tests Non-l2arc pool reads shouldn't be l2arc misses 2020-10-20 11:39:52 -07:00
udev Centralize variable substitution 2020-07-14 17:33:44 -07:00
.editorconfig
.gitignore
.gitmodules
AUTHORS Add zstd support to zfs 2020-08-20 10:30:06 -07:00
autogen.sh
CODE_OF_CONDUCT.md Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
configure.ac Add zpool_influxdb command 2020-10-09 09:29:21 -07:00
copy-builtin Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
cppcheck-suppressions.txt Import ZStandard v1.4.5 2020-08-20 10:30:06 -07:00
LICENSE
Makefile.am Fix commitcheck on FreeBSD 2020-10-20 08:35:53 -07:00
META Increase Supported Linux Kernel to 5.9 2020-10-13 09:51:13 -07:00
NEWS Fix NEWS file 2020-08-26 21:44:41 -07:00
NOTICE
README.md docs: update README's installation link 2020-10-08 09:33:53 -07:00
TEST
zfs.release.in

README.md

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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS is released under a CDDL license. For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are 12-STABLE and 13-CURRENT.