Go to file
Mariusz Zaborski 11647c669e Flush RRD only when TXGs contain data
This change modifies the behavior of spa_sync_time_logger when
flushing the RRD database.

Previously, once the sync interval elapsed, a flush would always
be generated. On solid-state devices, especially when the pool was
otherwise idle, this caused disks to wake up solely to write RRD
data. Since RRD is best-effort telemetry, this behavior is
unnecessary and wasteful.

With this change, spa_sync_time_logger delays flushing until a TXG
that already contains data is being synced. The RRD update is
appended to that TXG instead of forcing the creation of
a new write-only TXG.

During pool export, flushing is forced regardless of whether
the TXG contains user data. At that stage, data durability takes
precedence and a write must be issued.

Sponsored by: [Wasabi Technology, Inc.; Klara, Inc.]
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Mariusz Zaborski <mariusz.zaborski@klarasystems.com>
Closes #18082
Closes #18138
2026-02-11 11:41:13 -08:00
.github CI: Test build Lustre against ZFS 2026-02-10 17:03:02 -08:00
cmd Include missing newline in 'man' error 2026-02-10 17:01:50 -08:00
config Fix build for Linux 6.18 with PowerPC/RISC-V kernels. (#18145) 2026-02-10 17:00:04 -08:00
contrib zed.d, contrib: fix shellcheck errors in scripts 2026-02-10 16:58:49 -08:00
etc Replace bashisms in ZFS shell function stub. 2026-02-10 16:57:15 -08:00
include mmp: claim sequence id before final import 2026-02-10 17:01:29 -08:00
lib mmp: claim sequence id before final import 2026-02-10 17:01:29 -08:00
man cmd/zfs: clone: accept -u to not mount newly created datasets 2026-02-05 13:48:31 -08:00
module Flush RRD only when TXGs contain data 2026-02-11 11:41:13 -08:00
rpm Bump SONAME of libzfs and libzpool 2025-11-12 13:07:28 -08:00
scripts Linux 6.19: handle --werror with CONFIG_OBJTOOL_WERROR=y 2026-02-10 16:59:50 -08:00
tests Fix send:raw permission for send -w -I 2026-02-11 11:41:13 -08:00
udev zvol_id: make array length properly known at compile time 2025-12-10 10:21:29 -08:00
.editorconfig Add an .editorconfig; document git whitespace settings 2020-01-27 13:32:52 -08:00
.gitignore Packaging: Auto-generate changelog during configure (#15528) 2023-11-16 08:58:47 -08:00
.gitmodules .gitmodules: link to openzfs github repository 2021-04-12 09:37:23 -07:00
.mailmap mailmap/AUTHORS: update with recent new contributors 2025-11-12 13:04:35 -08:00
AUTHORS mailmap/AUTHORS: update with recent new contributors 2025-11-12 13:04:35 -08:00
autogen.sh autogen.sh: remove workaround for automake <1.14, needed for EL <=7 2025-11-12 13:05:16 -08:00
CODE_OF_CONDUCT.md Documentation corrections 2022-12-22 11:34:28 -08:00
configure.ac Linux build: handle CONFIG_OBJTOOL_WERROR=y 2025-06-16 08:12:09 -07:00
copy-builtin copy-builtin: add hooks with sed/>> 2022-05-10 10:17:43 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Install zarcstat and zarcsummary symlinks in Makefile 2025-09-09 17:05:30 -07:00
META Linux 6.19 compat: META 2026-02-11 09:38:39 -08:00
NEWS Fix NEWS file 2020-08-26 21:44:41 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Fix capitalization typo in README.md 2025-11-12 13:05:35 -08:00
RELEASES.md Update RELEASES.md LTS release to 2.2 2025-01-17 11:04:36 -05:00
TEST Remove CI builder customization from TEST 2020-03-16 10:46:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

img

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.

codecov coverity

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 13.0-RELEASE.