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Tony Nguyen c8bbf7c00b Improve write performance by using dmu_read_by_dnode() 
In zfs_log_write(), we can use dmu_read_by_dnode() rather than
dmu_read() thus avoiding unnecessary dnode_hold() calls.

We get a 2-5% performance gain for large sequential_writes tests, >=128K
writes to files with recordsize=8K.

Testing done on Ubuntu 18.04 with 4.15 kernel, 8vCPUs and SSD storage on
VMware ESX.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Nguyen <tony.nguyen@delphix.com>
Closes #9156
2019-08-15 17:36:24 -06:00
.github Update CONTRIBUTING to point users to IRC as well as mailing list 2019-03-13 11:57:57 -07:00
cmd spa_load_verify() may consume too much memory 2019-08-13 08:11:57 -06:00
config Minor style cleanup 2019-07-16 17:22:31 -07:00
contrib Add channel program for property based snapshots 2019-07-30 16:02:19 -07:00
etc Race between zfs-share and zfs-mount services 2019-07-28 18:13:56 -07:00
include Prevent race in blkptr_verify against device removal 2019-08-13 21:24:43 -06:00
lib Fix device expansion when VM is powered off 2019-08-13 21:18:53 -06:00
man spa_load_verify() may consume too much memory 2019-08-13 08:11:57 -06:00
module Improve write performance by using dmu_read_by_dnode() 2019-08-15 17:36:24 -06:00
rpm install path fixes 2019-07-30 10:06:09 -07:00
scripts Fix out-of-tree build failures 2019-06-24 09:32:47 -07:00
tests Fix out-of-order ZIL txtype lost on hardlinked files 2019-08-13 21:21:27 -06:00
udev Add enclosure_symlinks option to vdev_id 2018-12-14 17:27:49 -08:00
.gitignore git ignore python 3.7 virtual environment directories 2019-03-25 15:05:26 -07:00
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AUTHORS Update build system and packaging 2018-05-29 16:00:33 -07:00
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CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac Add channel program for property based snapshots 2019-07-30 16:02:19 -07:00
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Makefile.am Fix out-of-tree build failures 2019-06-24 09:32:47 -07:00
META Tag 0.8.0 2019-05-21 11:11:41 -07:00
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README.md Explicitly state supported Linux versions 2018-05-30 20:11:19 -07:00
TEST Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

img

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

codecov coverity

Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux 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 kernel versions.