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This adds two new pool properties: - dedup_table_size, the total size of all DDTs on the pool; and - dedup_table_quota, the maximum possible size of all DDTs in the pool When set, quota will be enforced by checking when a new entry is about to be created. If the pool is over its dedup quota, the entry won't be created, and the corresponding write will be converted to a regular non-dedup write. Note that existing entries can be updated (ie their refcounts changed), as that reuses the space rather than requiring more. dedup_table_quota can be set to 'auto', which will set it based on the size of the devices backing the "dedup" allocation device. This makes it possible to limit the DDTs to the size of a dedup vdev only, such that when the device fills, no new blocks are deduplicated. Sponsored-by: iXsystems, Inc. Sponsored-By: Klara Inc. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Signed-off-by: Don Brady <don.brady@klarasystems.com> Co-authored-by: Don Brady <don.brady@klarasystems.com> Co-authored-by: Rob Wing <rob.wing@klarasystems.com> Co-authored-by: Sean Eric Fagan <sean.fagan@klarasystems.com> Closes #15889 |
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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 12.4-RELEASE.