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Questions tagged [zfs]

ZFS is a modern file system and volume manager originally developed by Sun Microsystems and licensed under the CDDL. It is a copy-on-write file system with support for large storage arrays, protection against corruption, snapshots, clones, compression, deduplication and NFSv4 ACLs. An open-source fork of ZFS can be found at http://open-zfs.org/ , which is supported by ZFSonlinux.org, illumos.org and ZFS developers in the FreeBSD & Mac OS X communities.

ZFS is supported out of the box on a number of operating systems:

  • Solaris 10
  • Oracle Solaris 11 Express
  • FreeBSD
  • NexentaStor
  • illumos - specifically, illumos-based distributions, like:
    • Nexenta's illumian
    • Joyent's SmartOS (server OS with strong focus on virtualization)
    • OmniTI's OmniOS (general purpose server OS)
    • OpenIndiana (general purpose desktop/server OS)

Due to license incompatibilities, the CDDL licensed ZFS code cannot be distributed as part of the GPL licensed Linux kernel. Other alternatives methods are available for running ZFS on Linux:

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LSI 9211-8 or 9650se for a ZFS Pool

I'm putting together a white box (smartos) for our dev team with some of the leftover hardware we have. The server chassis I'm going to use has 8 swappable drives and I'm trying to determine which hba card to use for the ZFS Pool. I have both the…
chris
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ZFS file system and zpool size allocation

I am using zfs on some of my lxc containers at start when I was configuring I allocated 500GB my zpool list NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT lxd 496G 247G 249G - 44% 49% 1.00x ONLINE …
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mdadm array disappears after system reboot

I have created an md array like so: mdadm --create /dev/md0 --level=0 --raid-devices=2 /dev/sdc /dev/sdd Then I used the resulting device in a ZFS pool: zpool attach tank sdb md0 That worked great. ZFS was happy, I was happy. Now after rebooting…
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zpool reporting same drive as active and spare

I rebooted my Ubuntu 16.04.03 system and my systemd startup jobs aren't well organized yet because it does not bring up ZFS. (that's a different topic) So I did a zpool import sbn and ended up with the following status: # zpool status pool: sbn …
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Cannot format a drive once used in a ZFS pool

I have created a ZFS test pool with a drive - now I have pulled thet drive out and want to format it to EXT4 and use it outside of ZFS. I think the pool wasn't properly destroyed. Now when I plug the drive into a different machine running ZFS - the…
unfa
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ZFS - 2 Striped mirror set to 1 mirror set, how?

Currently I'm running a ZFS striped mirror set: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 mirror-0 …
Splendid
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ZFS on ramdrive optimal settings

After failing to configure ZFS for file creation and deletion without subsequent disk IO (Ramdisk like ZFS behavior), I'm creating ZFS over ramdrive. What to do with compression (but that part I could test by myself if nobody tested it before): ZFS…
ISanych
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install grub in a usb and boot proxmox from another drive

Good morning my friends! I'm tryng a solution before buy some new hardware. So this is my situation: I have some beautifull hp dl360p gen8 that comes with an p420i hardware raid controller. What I'm tryng to build is a proxmox+ceph cluster for my…
silvered.dragon
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Setting up SSH so that FreeNAS can connect to a Mac without a password

I would like to send a ZFS dataset to a Mac running OpenZFS. I have been able to replicate a FreeNAS dataset to a Mac running OpenZFS using the terminal. I did this using SSH password authentication. I'd like to setup a FreeNAS (FreeBSD based NAS…
Swisher Sweet
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Caching setup for my webserver (varnish, bcache)

I have a couple of questions about caching: Basically I have a server which serves images/video for a website hosted elsewhere. It runs Caddy (but that is not important). I have a 8TB ZFS (HDD) pool which at the time of writing has about 1TB of…
Zen Savona
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ZFS - zpool ARC cache plus L2ARC benchmarking

I have been doing lots of I/O testing on a ZFS system I will eventually use to serve virtual machines. I thought I would try adding SSD's for use as cache to see how much faster I can get the read speed. I also have 24GB of RAM in the machine that…
jemmille
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Appropriate arguments to copy data form HFS+ formatted drive to ZFS array

I'm migrating away from Drobo. I have about 4TB of data on a Drobo 5D, which is connected to a Mac Mini and formatted with HFS+. I used this command to copy the data there originally: sudo rsync -vaE --progress /Volumes/SourceName…
Swisher Sweet
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zfs-auto-snapshot only snapshots frequent snapshots even when hourly, daily, weekly and monthly snapshots are set to True

zfs-auto-snapshot is installed and has had the following settings applied to it: # zfs get all backup NAME PROPERTY VALUE SOURCE backup com.sun:auto-snapshot true …
Greg
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Freenas not mounting zfs pool

I'm using FreeNAS-11.0-RC2 (a4687be8c) without issues since two weeks ago, then yesterday I did a shutdown, then after powering it on again the zpool wasn't available. Then after reading this: zfs pool not automatically mounted I added…
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writing zfs dataset to block storage

Is there a proper way of writing a ZFS dataset, in my case which is an ext4 ubuntu filesystem, to a blank SSD? The data looks like this is that's at all helpful tank/filesystems/ubuntu_1604/(/etc, /boot, /var, and so…
Brando__
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