ZFS: Difference between revisions
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= Links = | = Links = | ||
*[http://open-zfs.org http://open-zfs.org] | *[http://open-zfs.org http://open-zfs.org] | ||
*[http://www.edplese.com/samba-with-zfs.html http://www.edplese.com/samba-with-zfs.html] | *[http://www.edplese.com/samba-with-zfs.html http://www.edplese.com/samba-with-zfs.html] | ||
*[http://wintelguy.com/zfs-calc.pl ZFS calculator] | *[http://wintelguy.com/zfs-calc.pl ZFS calculator] | ||
*[https://bm-stor.com/index.php/blog/Linux-cluster-with-ZFS-on-Cluster-in-a-Box/ ZFS clustering] | *[https://bm-stor.com/index.php/blog/Linux-cluster-with-ZFS-on-Cluster-in-a-Box/ ZFS clustering] | ||
*[https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/ https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/] ZFS and ECC] | *[https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/ https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/] ZFS and ECC] | ||
*[https://docs.joyent.com/private-cloud/troubleshooting/disk-replacement ZFS troubleshooting/disk replacement] | *[https://docs.joyent.com/private-cloud/troubleshooting/disk-replacement ZFS troubleshooting/disk replacement] | ||
*[https://www.high-availability.com/docs/Quickstart-ZFS-Cluster/ Creating a ZFS HA Cluster using shared or shared-nothing storage] | *[https://www.high-availability.com/docs/Quickstart-ZFS-Cluster/ Creating a ZFS HA Cluster using shared or shared-nothing storage] | ||
*[https://arstechnica.com/information-technology/2020/05/zfs-101-understanding-zfs-storage-and-performance/ ZFS 101] | *[https://arstechnica.com/information-technology/2020/05/zfs-101-understanding-zfs-storage-and-performance/ ZFS 101] | ||
*[https://arstechnica.com/gadgets/2021/06/raidz-expansion-code-lands-in-openzfs-master/ Raidz expansion] | *[https://arstechnica.com/gadgets/2021/06/raidz-expansion-code-lands-in-openzfs-master/ Raidz expansion] | ||
*[https://somedudesays.com/2021/08/the-basic-guide-to-working-with-zfs/ Basic guide to working with zfs] | *[https://somedudesays.com/2021/08/the-basic-guide-to-working-with-zfs/ Basic guide to working with zfs] | ||
=Documentation= | |||
*[https://openzfs.github.io/openzfs-docs/man/4/zfs.4.html zfs manpage] | |||
*[http://zfsonlinux.org/ ZFS on Linux] | |||
*[https://openzfs.org/wiki/ openzfs wiki] | |||
*[https://wiki.gentoo.org/wiki/ZFS https://wiki.gentoo.org/wiki/ZFS] | |||
*[https://blog.programster.org/zfs-cheatsheet ZFS cheatsheet] | |||
*[http://wiki.freebsd.org/ZFSQuickStartGuide http://wiki.freebsd.org/ZFSQuickStartGuide] | |||
*[http://www.opensolaris.org/os/community/zfs/intro/ Opensolaris ZFS intro] | |||
*[https://linuxhint.com/configure-zfs-cache-high-speed-io/ Using and tuning ARC] | |||
*[http://www.raidz-calculator.com/raidz-types-reference.aspx raidz types reference] | |||
=Terms and acronyms= | =Terms and acronyms= | ||
Revision as of 14:47, 8 August 2023
Links
- http://open-zfs.org
- http://www.edplese.com/samba-with-zfs.html
- ZFS calculator
- ZFS clustering
- https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/ ZFS and ECC]
- ZFS troubleshooting/disk replacement
- Creating a ZFS HA Cluster using shared or shared-nothing storage
- ZFS 101
- Raidz expansion
- Basic guide to working with zfs
Documentation
- zfs manpage
- ZFS on Linux
- openzfs wiki
- https://wiki.gentoo.org/wiki/ZFS
- ZFS cheatsheet
- http://wiki.freebsd.org/ZFSQuickStartGuide
- Opensolaris ZFS intro
- Using and tuning ARC
- raidz types reference
Terms and acronyms
vdev
Virtual Device.
HOWTO
Create zfs filesystem
zfs create poolname/fsname
this also creates mountpoint
Add vdev to pool
zpool add mypool raidz1 sdg sdh sdi
Replace disk in zfs
Some links
Get information first:
Name of disk
zpool status
Find uid of disk to replace
take it offline
zpool offline poolname ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5RLZC6V
Get the disk guid:
zdb
guid: 15233236897831806877
Get list of disk by id:
ls -al /dev/disk/by-id
Save the id, shutdown, replace disk, boot:
Find the new disk:
ls -al /dev/disk/by-id
Run replace command. The id is the guid of the old disk, name is of the new disk
zpool replace tank /dev/disk/by-id/13450850036953119346 /dev/disk/by-id/ata-ST4000VN000-1H4168_Z302FQVZ
Showing information about ZFS pools and datasets
Show pools with sizes
zpool list
or
zpool list -H -o name,size
Show reservations on datasets
zfs list -o name,reservations
Swap on zfs
https://askubuntu.com/questions/228149/zfs-partition-as-swap
vdevs
multiple vdevs
Multiple vdevs in a zpool get striped. What about balance?
invalid vdev specification
Probably means you need -f
Tuning arc settings
See Tuning ZFS modules parameters
arcstat arc_summary grep c_max /proc/spl/kstat/zfs/arcstats echo 5368709120 > /sys/module/zfs/parameters/zfs_arc_max
maybe you need
echo 3 > /proc/sys/vm/drop_caches
Tune zfs_arc_dnode_limit_percent
Assuming zfs_arc_dnode_limit = 0:
echo 20 > /sys/module/zfs/parameters/zfs_arc_dnode_limit_percent
In /et/modprobe.d/zfs.conf:
options zfs zfs_arc_dnode_limit_percent=20
FAQ
show status and disks
zpool status
show drives/pools
zfs list
check raid level
zfs list -a
Estimate raidz speeds
raidz1: N/(N-1) * IOPS raidz2: N/(N-2) * IOPS raidz3: N/(N-3) * IOPS
