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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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Backup storage server with ZFS

I am IT everything man at a small company. I want to design a new infrastructure including a new server and a separate backup server with company wide backup policy. The most important thing in the company is the SQL Server and its databases. There…
Krystian Lieber
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Since upgrading to Solaris 11, my ARC size has consistently targeted 119MB, despite having 30GB RAM. What? Why?

I ran a NAS/SAN box on Solaris 11 Express before Solaris 11 was released. The box is an HP X1600 with an attached D2700. In all, 12x 1TB 7200 SATA disks, 12x 300GB 10k SAS disks in separate zpools. Total RAM is 30GB. Services provided are CIFS, NFS…
growse
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Backup ZFS snapshots to tape (both full and diff)

What would be the best way to implement an LTO tape-based backup system on a ZFS fileserver? I've got about 6TB that need to be backed up on a daily basis, along with an existing HP 1840 LTO4 tape drive and a bunch of tapes. I've already got the ZFS…
growse
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ZFS: How can I stop a zpool replace that's currently in progress?

A few days ago, I noticed that the ZFS pool on my home server had started reslivering a disk by itself but was no longer making any progress. The disk had some SMART errors (but did not consider itself failed), so I decided to replace it with a…
Kaypro II
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Recommendations on ZFS on FreeBSD as a NAS box?

Please note that the answers on this page are from 2009, and should not be relied on as gospel. If you have a specific question about zfs then please click the Ask a Question button and ask a specific question. I was thinking of building a home…
grieve
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ZFS on top of Hardware Mirroring, or just mirror in ZFS?

I have an IBM x346 with dual 3.2Ghz Xeons and 2x36GB 15k SCSI disks. I'm running an entirely ZFS-based install of FreeBSD 8.1. I can configure the bios to mirror the two disks, and then put ZFS on that "single" drive, or I can mirror the drives…
Paul McMillan
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What are "good" speeds for iSCSI and NFS over 1GB ethernet?

I have an OpenSolaris box sharing out two ZFS filesystems. One is an NFS connection to a CentOS box running VMware server (the disk images are stored in ZFS). The other is an iSCSI connection to a Windows 2008 server with NTFS formatting on top of…
Sysadminicus
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Anybody have experience with using Nexenta?

I'm evaluating the Nexenta platform to hopefully one day replace our legacy file servers. I would primarily use it as a CIFS server in an Active Directory environment. Anyone out there have any experience using it? Good? Bad? Which hardware…
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Is there a case against ZFS?

Is there still a case against using ZFS in production? I run Solaris servers and I am planning an upgrade to Solaris 10 10/09 from an earlier release. Currently we use SVM for local disks and our vendor's technology for SAN volume management. We…
Louis Munro
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Dell R730xd - Best way to configure storage for simultaneous use with ZFS & Hardware RAID

I recently purchased a Dell R730xd that came with an H730 RAID card. I would like to bring an existing 6 disk ZFS pool to this server as well as create an additional 6 disk hardware RAID. Is it possible to configure an H730 RAID card to operate in…
TJ Zimmerman
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Linux: ZFS analog of pvmove - how to move data off from vdev?

I need to expand disk capacity of the server. The pool was started with 1Tb disk, then it was expanded with 2Tb disk. There is more than 1Tb free space, i.e. all data will easily fit 2Tb part, but it is currently allocated on 1Tb disks. In reality,…
Nikita Kipriyanov
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File-sharing over Infiniband on FreeBSD

I have a pair of servers, which I'd like to connect to each other directly -- rather than through the switch shared by the rest of the network. I expect to benefit from lower latency and higher bandwidth afforded by the direct connection (including…
Mikhail T.
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Offline uncorrectable sectors in SSDs being used for ZFS L2ARC?

I have two enterprise-grade SSDs that I've been using for L2ARC in an OpenZFS pool for a few years. Workflow during this time has been fairly heavy, with lots of reads and writes, serving up video to clients for video post-production. Recently, got…
user260467
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Wait before zpool import on Ubuntu boot

I have installed Ubuntu 18.04 on a Dell PowerEdge R720xd using ZFS. There are two 1TB boot drives in a ZFS mirror configuration. I followed the instructions in the ZFS on Linux Wiki. (Note: My system is using an LSI LSI00244 (9201-16i) Host-bus…
Moshe Katz
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Storage server - Swapping SAS HBA card for a different model

TL;DR Server's original SAS HBA (PCIe card) does not support transparent passthrough, which is desired, as I want the OS to manage the disks (ZFS). At my company, we have an Intel SSR212MC2 server (spec sheet) with SRCSAS144E RAID controller. The…
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