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Questions tagged [zfsonlinux]

zfsonlinux provides a native Linux kernel port of the ZFS filesystem so that ZFS may run natively on Linux. It is very different from ZFS-fuse which provides ZFS on top of a userspace-filesystem layer. The ZFS On Linux project is hosted on zfsonlinux.org.

zfsonlinux provides a native Linux kernel port of the ZFS filesystem so that ZFS may run natively on Linux. It is very different from ZFS-fuse which provides ZFS on top of a userspace-filesystem layer.

The ZFS On Linux project is hosted on zfsonlinux.org.

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ZFS on Linux (ZoL) and realtime replication

I would like to understand what is the best solution for realtime replication between two ZFS on Linux (ZoL) boxes connected by a 10 GbE link. The goal is to use them for virtual machines; only one box at a time will run the virtual machines and the…
shodanshok
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Why is ZFS on Linux unable to fully utilize 8x SSDs on AWS i2.8xlarge instance?

I'm completely new to ZFS, so to start with I thought I'd do some simple benchmarks on it to get a feel for how it behaves. I wanted to push the limits of its performance so I provisioned an Amazon EC2 i2.8xlarge instance (almost $7/hr, time really…
anelson
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Slow sequential speeds on 9x7-drive raidz2 (ZFS ZoL 0.8.1)

I'm running a large ZFS pool built for 256K+ request size sequential reads and writes via iSCSI (for backups) on Ubuntu 18.04. Given the need for high throughput and space efficiency, and less need for random small-block performance, I went with…
obrienmd
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Can ZFS using snaphots replace DRBD using sync protocol A?

This question is related to a former, more generic one, but this time I would like to ask more specifically if ZFS can replace DRBD in a use case like mine. That is two servers, both hosting their own VMs or other services while replicating the VMs…
Thorsten Schöning
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Using ZFS head node as database server?

I'm using a dual-head ZFS-backed NAS for high availability cluster shared storage, based on Nexenta's recommended architecture as seen here: The disks in 1 JBOD will store the database files for a single 4 TB Postgres database and the disks in the…
elleciel
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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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Docker service starts before ZFS

I am using Docker CE on Ubuntu 16.04, with ZFS as storage for Docker. Setup is pretty much standard: There's a zpool that has multiple disks On the zpool, there's a zfs filesystem with mountpoint /var/lib/docker. Docker sees that the filesystem is…
ItalyPaleAle
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How to set the number of snapshots zfs-auto-snapshot should retain?

Using the below zfs-auto-snapshot commands, how to specify to keep 52 weekly snapshots and infinite number of monthly snapshots? sudo zfs set com.sun:auto-snapshot=true storage sudo zfs set com.sun:auto-snapshot:weekly=true storage sudo zfs set…
Greg
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Why is `zfs list -t snapshot` orders of magnitude slower than `ls .zfs/snapshot`?

With all ZFS-on-Linux versions I've ever tried, using zfs list to list all snapshots of a filesystem or volum (zfs list -r -t snapshot -H -o name pool/filesystem) always takes many orders of magnitude more time to run than ls .zfs/snapshot, which is…
Tobia
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Extreme ZFS slowdowns after several months

I've got a general-purpose server, providing mail, DNS, web, databases, and some other services for a number of users. It's got a Xeon E3-1275 at 3.40 GHz, 16 GB ECC RAM. Running Linux kernel 4.2.3, with ZFS-on-Linux 0.6.5.3. The disk layout is 2x…
squidpickles
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Linux ZFS does not buffer writes to write buffer (SLOG/ZIL)?

When experiencing write I/O, the log column in zpool iostat -v does not show any ZIL activity, ever. This results in higher than expected wait times when writing data to disk (sometimes over 80ms during contention). capacity …
user1955162
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Why is ZFS not doing anything with my disk's duff sector?

I was under the impression that if an I/O error occurs during a read from a ZFS pool, two things will happen: The failure will be recorded in either the READ or CKSUM statistic of the relevant device, propagating upwards toward the pool…
user
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Upgraded Ubuntu, all drives in one zpool marked unavailable

I just upgraded Ubuntu 14.04, and I had two ZFS pools on the server. There was some minor issue with me fighting with the ZFS driver and the kernel version, but that's worked out now. One pool came online, and mounted fine. The other didn't. The…
Matt Sieker
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zfs - two pools with nested mountpoints and conflicting mount order

I have a problem with automounting separate pools, that have nested mountpoints. I am using ZfsOnLinux 0.6.2. The siuation currently is as follows: zpool1 ---> /var zpool1/log ---> /var/log zpool1/mail ---> /var/mail Now I need to add a…
Paweł Rumian
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Where is the central ZFS website now?

Oracle dumped OpenSolaris in Fall 2010, and it is unclear if Oracle will continue to publicly release updates to ZFS, except maybe after they release their next major version of Solaris. FreeBSD now has ZFS v28 available for testing. But where did…
Stefan Lasiewski
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