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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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fio numjobs & iodepth Values to Simulate Database PostgreSQL Workload?

I am trying to benchmark a ZFS RAID-10 array of SATA SSDs using fio with settings that are somewhat representative of database workloads like for PostgreSQL. For example, for random reads: fio --randrepeat=1 --ioengine=libaio --direct=1…
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How to change ZFS RAID 1 to RAIDZ-1 (Proxmox)

I have a server using proxmox (6.1) with VM living in a ZFS RAID1 called DATARAID. I have a new hard disk to use there, and I want to expand to RAIDZ-1, that seems to be faster that RAID1 (https://calomel.org/zfs_raid_speed_capacity.html ,…
kprkpr
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How to delete inaccessible data on root ZFS dataset?

I have a mirrored ZFS array on a FreeBSD that I used for home NAS, consisting of a 6TB internal drive and a 8TB external USB drive. I have 2TB of space occupied that should not be occupied, but I cannot delete or even see any of its contents. I…
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How to export zpool from alternate disk slice?

I need some help in recovering ZFS pool. Here is scenerio. There are two disks - c0t0d0 - This is good disk. I cloned it from other server and boot server from this disk. c0t1d0 - This is original disk of this server, having errors. I am able to…
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Windows VM on XEN --> ZFS possible?

I am running Debian Jessie with XEN installed. All configuration files for VMs etc.. is all stored on a ZFS pool. I am just wondering if anyone can confirm if it is possible to install a windows VM? IF so, is there any guides?
josh
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Best software raid /filesystem for samba on linux

I am running ubuntu 16.04 server and need to store files for a samba file server on a software raid. There are 4 500GB SSDs and stability / redundance / iops are of utmost importance. I tried running zfs on linux for a while but samba acl settings…
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Increase the capacity of a RAIDZ1 vdev on ZFS

I'm running FreeNAS on a Mini-ITX Box at home. I have 3x3TB HDDs in a RAIDZ1 udev. Now I'm running out of space. I have space for one additional HDD in my case. I want to convert the 3x3TB RAIDZ1 into a 4x3TB RAIDZ1. Can I do that without sending a…
koloman
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Ubuntu + ZFS vs Rockstor

I have a personal fileserver at home with 6 HDs: 1 500 GB one for the OS 1 4 TB one for temporary data four 2 TB ones that we want to configure in some sort of RAID 5 fashion It looks like I have two options: Ubuntu with the four 2 TB drives…
IMTheNachoMan
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Removing all hw raid from Sun server

This post is about the same server as this post, where multiple disks were in a LUN, and then ZFS was used to make the ZFS pools. I would like to use the 6140 disk arrays as JBOD's on either Linux or OmniOS, so now I have deleted all RAID pools…
Jasmine Lognnes
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Why does a failed ZFS disk still seem to work fine?

Two disks just failed in my zpool with read/write errors, so I took them out and inserted them in another host, created a zpool just with them, and filled the file system with dd if=/dev/zero of=/crashpool/zero bs=1M count=1000000000000 When it had…
Sandra
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Can I remove a vdev from a ZFS pool by rolling back?

A curiosity related question: Can a VDEV be removed from a ZFS pool by undoing the last pool transactions (zpool import -F) or rolling back to an earlier snapshot?
Cyclone
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Ubuntu 12.04 RAID 5/6: Native RAID or ZFS?

I have 8 hard drives of different sizes that I want in a RAID 5 or 6 configuration, the OS is Ubuntu 12.04 desktop. Does the native RAID in Ubuntu support RAID configurations with hard drives of different sizes? Can i grow the RAID in the future?…
Erik
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ZFS System on Production

Do you know/have any system which works on ZFS such as RDMS? If yes, what is your setup? FreeBSD, ZFS on Linux etc.
metdos
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How much overhead does ZFS have?

Adding a file system to a raw device of course takes up some overhead. The question is how many percent does ZFS take? And does overhead differ depending on the ZFS raid set? Update The purpose is to be able to be able to estimate usable disk space…
Sandra
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ZFS Configuration advice

I need some advice on configuring ZFS. Here is what I have: Physical Disks: 4x 3 TB 2x 2 TB 2x 1 TB What is the best configuration for my Vdevs and storage pool. I want to maximaze space but still maintain redundancy. Should I just get 2 more…
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