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3014dcb762
At least FreeBSD has a limit of 256 simultaneous AIO requests per process. Attempt to issue more results in EAGAIN errors. Since we issue 4 requests per disk/partition from 2xCPUs threads, it is quite easy to reach that limit on large systems, that results in random pool import failures. It annoyed me for quite a while on a system with 64 CPUs and 70+ partitioned disks. This patch from one side limits the number of threads to avoid the error, while from another should softly fall back to sync reads in case of error. It takes into account _SC_AIO_MAX as a system-wide AIO limit and _SC_AIO_LISTIO_MAX as a closest value to per-process limit. The last not exactly right, but it is the best I found. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #16551 |
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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.