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Special vdevs were originally designed as a small blocks storage for dRAID, for which role RAIDZ/dRAID topologies are not good. But it is more often used as SSD storage for metadata and hot data of HDD pools. In these use cases narrow RAIDZ of SSDs might be fine, so we should not introduce unnecessary restrictions, and ZFS internally does not care. Similar applies to dedup vdevs. Original DDT used 4KB blocks, for which anything but mirror was a terrible storage. But new FDT implementation uses 32KB blocks by default, which are much less demanding even including compression, and which could be increased even higher now, if needed. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Allan Jude <allan@klarasystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #17496 |
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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.