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Alan Somers a0e01997ec Parallelize vdev_load metaslab_init is the slowest part of importing a mature pool, and it must be repeated hundreds of times for each top-level vdev. But its speed is dominated by a few serialized disk accesses. That can lead to import times of > 1 hour for pools with many top-level vdevs on spinny disks. Speed up the import by using a taskqueue to parallelize vdev_load across all top-level vdevs. This also requires adding mutex protection to metaslab_class_t.mc_historgram. The mc_histogram fields were unprotected when that code was first written in "Illumos 4976-4984 - metaslab improvements" (OpenZFS `f3a7f6610f`). The lock wasn't added until `3dfb57a35e`, though it's unclear exactly which fields it's supposed to protect. In any case, it wasn't until vdev_load was parallelized that any code attempted concurrent access to those fields. Sponsored by: Axcient Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alan Somers <asomers@gmail.com> Closes #11470		2021-01-26 19:35:59 -08:00
.github	Forward questions to github discussions	2020-12-21 20:09:02 -08:00
cmd	cppcheck: integrete cppcheck	2021-01-26 16:12:26 -08:00
config	cppcheck: integrete cppcheck	2021-01-26 16:12:26 -08:00
contrib	dracut: Fix race condition between load-key and import	2021-01-26 12:14:22 -08:00
etc	Verify zfs module loaded before starting services	2020-11-28 11:11:18 -08:00
include	Parallelize vdev_load	2021-01-26 19:35:59 -08:00
lib	cppcheck: integrete cppcheck	2021-01-26 16:12:26 -08:00
man	Fix a man page link in zfs-program.8	2021-01-26 16:17:11 -08:00
module	Parallelize vdev_load	2021-01-26 19:35:59 -08:00
rpm	Install zgenhostid to sbindir	2021-01-21 12:58:24 -08:00
scripts	DKMS: Disable weak modules	2020-12-15 09:22:30 -08:00
tests	RAIDZ2/3 fails to heal silently corrupted parity w/2+ bad disks	2021-01-26 16:05:05 -08:00
udev	Centralize variable substitution	2020-07-14 17:33:44 -07:00
.editorconfig	Add an .editorconfig; document git whitespace settings	2020-01-27 13:32:52 -08:00
.gitignore	Add FreeBSD support to OpenZFS	2020-04-14 11:36:28 -07:00
.gitmodules	Add zimport.sh compatibility test script	2014-02-21 12:10:31 -08:00
AUTHORS	Add zstd support to zfs	2020-08-20 10:30:06 -07:00
autogen.sh	Cause autogen.sh to fail if autoreconf fails	2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md	Replace ZFS on Linux references with OpenZFS	2020-10-08 20:10:13 -07:00
configure.ac	Autoconf 2.70 compatibility	2021-01-02 16:55:55 -08:00
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
LICENSE	Update build system and packaging	2018-05-29 16:00:33 -07:00
Makefile.am	cppcheck: integrete cppcheck	2021-01-26 16:12:26 -08:00
META	Linux 5.10 compat: META	2020-12-23 08:55:02 -08:00
NEWS	Fix NEWS file	2020-08-26 21:44:41 -07:00
NOTICE	Update build system and packaging	2018-05-29 16:00:33 -07:00
README.md	docs: update README's installation link	2020-10-08 09:33:53 -07:00
TEST	Remove CI builder customization from TEST	2020-03-16 10:46:03 -07:00
zfs.release.in	Move zfs.release generation to configure step	2012-07-12 12:22:51 -07:00

README.md

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.

Official Resources

Documentation - for using and developing this repo
ZoL Site - Linux release info & links
Mailing lists
OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)

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.