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Brian Atkinson 345196be18
Single IO issue for raidz writes with skip sector
In order to reduce contention on the vq_lock, optional skip sectors
for Raidz writes can be placed into a single IO request. This is done by
padding out the linear ABD for a parity column to contain the skip
sector and by creating gang ABD to contain the data and skip sector for
data columns.

The vdev_raidz_map_alloc() function now contains specific functions for
both reads and write to allocate the ABD's that will be issued down to
the VDEV chldren.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-By: Mark Maybee <mark.maybee@delphix.com>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes #12333
2021-11-09 12:51:33 -07:00
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man Fix lseek(SEEK_DATA/SEEK_HOLE) mmap consistency 2021-11-07 14:27:44 -07:00
module Single IO issue for raidz writes with skip sector 2021-11-09 12:51:33 -07:00
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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.

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Official Resources

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 any supported branches and releases starting from 12.2-RELEASE.