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d393166c54
Before parallel eviction implementation zfs_arc_evict_batch_limit caused loop exits after evicting 10 headers. The cost of it is not big and well motivated. Now though taskq task exit after the same 10 headers is much more expensive. To cover the context switch overhead of taskq introduce another level of batching, controlled by zfs_arc_evict_batches_limit tunable, used only for parallel eviction. My tests including 36 parallel reads with 4KB recordsize that shown 1.4GB/s (~460K blocks/s) before with heavy arc_evict_lock contention, now show 6.5GB/s (~1.6M blocks/s) without arc_evict_lock contention. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com> Closes #17970 |
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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 13.0-RELEASE.