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Alexander Motin
645b833079
- Reduce number of allocators on small system down to one per 4 CPU cores, keeping maximum at 4 on 16+ core systems. Small systems should not have the lock contention multiple allocators supposed to solve, while having several metaslabs open and modified each TXG is not free. - Reduce number of write issue taskqs down to one per 16 CPU cores and an integer fraction of number of allocators. On mid- sized systems, where multiple allocators already make sense, too many write issue taskqs may reduce write speed on single-file workloads, since single file is handled by only one taskq to reduce fragmentation. On large systems, that can actually benefit from many taskq's better IOPS, the bottleneck is less important, since in worst case there will be at least 16 cores to handle it. - Distribute dnodes between allocators (and taskqs) in a round- robin fashion instead of relying on sync taskqs to be balanced. The last is not guarantied and may depend on scheduling. - Remove io_wr_iss_tq from struct zio. io_allocator is enough. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #16130
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.