04bae5ec95
High priority threads are handling ZIL writes. While there is no ZIL compression, there is encryption, checksuming and RAIDZ math. We've found that on large systems 1 taskq with 5 threads can be a bottleneck for throughput, IOPS or both. Instead of just bumping number of threads with a risk of overloading CPUs and increasing latency, switch to using TQ_FRONT mechanism to increase sync write requests priority within standard write threads. Do not do it on Illumos, since its TQ_FRONT implementation is inherently unfair. FreeBSD and Linux don't have this problem, so we can do it there. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rob Norris <robn@despairlabs.com> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored-By: iXsystems, Inc. Closes #16146 |
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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
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 12.4-RELEASE.