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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 didn't expand free space after add

I recently expanded my storage pool "zstorage" by adding two more drives. It had 3 3TB drives in RAID-Z, and I added two more 1.5TB drives also in RAID-Z (which I understand is effectively the same as mirroring). I know it's not the most efficient…
Kevin Wood
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Can I mirror a 2-disk striped zpool to a single large drive?

Currently I have a 4TB pool with two striped drives: # zpool status pool: lxd state: ONLINE status: Some supported features are not enabled on the pool. The pool can still be used, but some features are unavailable. action: Enable all…
Arni J
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ZFS I/O Error, Kernel Panic during import

I'm running a raidz1-0 (RAID5) setup with 4 data 2TB SSDs. During midnight, somehow 2 of my data disks experience some I/O error (from /var/log/messages). When I investigated in the morning, the zpool status shows the following : state:…
Jealous_Donut_7128
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How does zfs know which snapshots to send with the `-I` flag?

From the manual: A group of incremental snapshots can be combined into one snapshot by using the zfs send -I option. For example: # zfs send -I pool/fs@snapA pool/fs@snapD > /snaps/fs@all-I How does zfs know that @snapB and @snapC are in between…
Manuel Schmidt
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Persistent ZFS pool errors on Ubuntu, even after repeated scrubs

My 3-disk ZFS pool has been scrubbed several times after replacing failing disks. "zpool status -v" provided a list of files which were deleted and removed a good number of errors. Despite running a couple of "zpool scrub" processes to completion, I…
Paul Leyland
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Samba and ZFS resulting in NT_STATUS_BAD_NETWORK_NAME

I am currently trying to share my ZFS dataset using SMB. Unfortunately I receive the error NT_STATUS_BAD_NETWORK_NAME every time I try to connect to the share. The error does not make much sense to me since as far as I understood it from this source…
mchp
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automatic mounting of encrypted zfs dataset

As a newbie to zfs, I am having trouble getting an encrypted dataset mounted during boot. The dataset is protected with a raw key and not a passphrase. This is how I created the zpool and the dataset: # zpool list no pools available # zpool create…
th0masrad
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Unexpected ZFS async write performance at different queue depths

For some reason, QD2 seems to be the best in terms of raw IOPS... After seeing an interesting article comparing a couple different drives for SLOG usage, I got curious about the performance of my own system at different queue depths. The system…
Sam
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ZFS pool disappears and says "I/O error" because of one missing device

I had a ZFS pool named data with 3 disks. Two disks were attached to the raidz by ID, but the third one was attached by volume (sda). I physically removed the sda device because I wanted to attach it by name. But when I rebooted, the pool is no…
Alex Shaw
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ZFS send/receive fails, target has been modified, because of a zfs userspace query?

I use zfs send/receive to replicate a zfs file system to another server every day. The workflow is the standard send receive: # 1. create snapshot on source zfs snapshot ${source_fs}@${today} # 2. send incremental update from yesterday to today to…
Sethos II
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Slow read speed in ZFS mirror (slower than write speed, and very slow for small chunk sizes)

I have a server running debian on top of a ZFS 3-way mirror of Exos X18 18TB (ST18000NM001J). I'm benchmarking it and I'm finding some surprises for the read rate under certain conditions. But first, for the benchmarking I created a benchmarking…
Héctor
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How ZFS avoids inodes' number exhaustion and why wasn't it implemented in previous filesystems (e.g. ext4)?

Chapter 1 of Oracle's ZFS Guide states that all metadata is allocated dynamically, so no need exists to preallocate inodes which was a positive surprise, but makes me wonder why the methods ZFS uses to achieve that weren't implemented in other…
Daniel Krajnik
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ZoL+FIO Randwrite nvme bs=8k@32io = 148MiB/s?

Sorry for the title, but it's very short summary of BS that I'm looking into. Situation I'm using ZoL 2.1.5 (from jonathonf's ppa) on Ubuntu (tried 20.04&22.04) I have following NVMe disk Kingston KC2500 1TB (/dev/nvme0n1) formatted as 512 (with…
Vladislav Losev
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How can I list what zfs compression algorithms are available?

I have a zfs pool on a production system and I would like to see if it's possible to use zstd compression instead of the current gzip setting. Is there any way to list available compression options?
yes
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Import a ZFS pool from a disk snapshot of another machine

I have a server on Azure with a disk mounted that contains a ZFS filesystem. I also have a snapshot of the disk (taken from Azure, not zfs snapshot) which I want to mount to a new server. The disk created from the snapshot is visible on the new…
Srujan Deshpande
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