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This allows to rewrite content of specified file(s) as-is without modifications, but at a different location, compression, checksum, dedup, copies and other parameter values. It is faster than read plus write, since it does not require data copying to user-space. It is also faster for sync=always datasets, since without data modification it does not require ZIL writing. Also since it is protected by normal range range locks, it can be done under any other load. Also it does not affect file's modification time or other properties. Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Rob Norris <robn@despairlabs.com> |
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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.