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Prakash Surya f521ce1b9c Allow "arc_p" to drop to zero or grow to "arc_c" 
Setting a limit on the minimum value of "arc_p" has been shown to have
detrimental effects on the arc hit rate for certain "metadata" intensive
workloads. Specifically, this has been exhibited with a workload that
constantly dirties new "metadata" but also frequently touches a "small"
amount of mfu data (e.g. mkdir's).

What is seen is that the new anon data throttles the mfu list to a
negligible size (because arc_p > anon + mru in arc_get_data_buf), even
though the mfu ghost list receives a constant stream of hits. To remedy
this, arc_p is now allowed to drop to zero if the algorithm deems it
necessary.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2110
2014-02-21 16:10:27 -08:00
cmd Add erratum for issue #2094 2014-02-21 12:10:40 -08:00
config Add systemd unit files for ZFS startup 2014-02-05 12:25:30 -08:00
dracut Refresh dracut module setup 2013-03-21 12:51:06 -07:00
etc Add systemd unit files for ZFS startup 2014-02-05 12:25:30 -08:00
include Add erratum for issue #2094 2014-02-21 12:10:40 -08:00
lib Add generic errata infrastructure 2014-02-21 12:10:40 -08:00
man Allow "arc_p" to drop to zero or grow to "arc_c" 2014-02-21 16:10:27 -08:00
module Allow "arc_p" to drop to zero or grow to "arc_c" 2014-02-21 16:10:27 -08:00
patches Adding grub2 mkconfig support patch 2012-07-30 16:17:23 -07:00
rpm Add explicit Conflicts for zfs-fuse packages 2014-02-10 15:54:27 -08:00
scripts Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
udev Open pools asynchronously after module load 2013-07-03 09:24:38 -07:00
.gitignore Ignore *.{deb,rpm,tar.gz} files in the top directory. 2013-04-24 16:18:59 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add systemd unit files for ZFS startup 2014-02-05 12:25:30 -08:00
copy-builtin Consistent menuconfig name 2012-08-26 13:49:37 -07:00
COPYRIGHT Refresh links to web site 2013-03-06 15:46:41 -08:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am cstyle: Exclude several files from 'make checkstyle' 2013-12-18 16:46:35 -08:00
META Tag zfs-0.6.2 2013-08-22 13:33:26 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
zfs-script-config.sh.in Retire zpool_id infrastructure 2013-01-29 12:23:17 -08:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

Native ZFS for Linux!

ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.

ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers.

Full documentation for installing ZoL on your favorite Linux distribution can be found at: http://zfsonlinux.org