Storing large amount of small files in HDD pool [migrated]
I have a Z6 HDD pool with 6 x 18T drives and a SLOG, LZ4 compression is enabled by default. Now I need to store large amount of small files and I'm worried about fragmentation.The files:70K files...
View ArticleCorrupt zpool disks not being discovered. How do I rebuild?
I have a Proxmox server with a few zpools. One of the zpools rust01 is a 4-disk zpool, where the metadata and write cache were some nvme m.2 drives on the motherboard (one for each - I know, stupid,...
View ArticleIf I'm using compression with ZFS can I somehow request the compressed...
Now that Zstd is slowly getting support in the browsers I'm wondering if I could keep my Zstd compression and forwarding the files as is with ZFS.Currently as far as I know ZFS implicitly decompresses...
View ArticleZFS import unable to find any pools
I had a ZFS pool -- a mirror containing 2 vdevs -- running on a FreeBSD server. I now have only one of the disks from the mirror, and I am trying to recover files from it.The ZFS data sits in a GPT...
View ArticleErasing Contents of a Parent Dataset Without Destroying Children?
I have a parent dataset under which are stored a number of other datasets that are still in use. In the past I also used the parent itself to store data, as it was part of a directory...
View ArticleReimport a ZFS pool that has not correctly been exported
I recently bought a QNap NAS and decided to try out a few NAS OS, amongst which TrueNAS. After creating a ZFS pool on TrueNAS and transfering a few files, I got disatisfied with TrueNAS and decided to...
View ArticleZFS-pool without striping to be used within VM-images?
I'm going to setup a VM, starting with two disks, one for / and one for the data using a ZFS-pool. Don't want to create VM disks too large, even in case of dynamically growing ones, and prefer chunks...
View ArticleLarge number of snapshots on a ZFS system
Here's my scenario: I have two servers (well many more, but two for this scenario), one is a Solaris backup server, the second is a CentOS Linux Server. Every night the CentOS server runs a cron job to...
View ArticleReplacement disk faults
I had a disk in my pool fault (raise too many errors).The number of I/O errors associated with a ZFS device exceededacceptable levels. ZFS has marked the device as faulted. impact: Fault tolerance of...
View ArticleZFS - Recover or repair a corrupted file in a snapshot from backup?
A pool has suffered permanent data corruption to file data that's part of a snapshot. If the file data was part of the filesystem (and not part of any snapshot), I could simply recover the file from a...
View ArticleZFS scrub load average is ridiculously high
I have a relatively new box here running Ubuntu with ZFS-on-Linux across an 18-disk array. The first couple of times I did a zpool scrub, it seemed like everything worked nicely, but the last several...
View ArticleHow can I tell which ZFS snapshots are affected by an error?
A recent scrub of my ZFS pool uncovered one error:$ zpool status -v rpool pool: rpool state: ONLINEstatus: One or more devices has experienced an error resulting in data corruption. Applications may be...
View ArticleRecommended way of transferring an 𝚒𝚘𝚌𝚊𝚐𝚎 jail from one host to another
Source: iocage thick jail running on FreeBSD-12.0p12.Destination: FreeBSD-12.1p1.Both hosts use ZFS.What is the recommended method to transfer an existing iocage thick jail from the source to the...
View ArticleOOM after files remove with ZFS and deduplication
I have recently posted the issue I'm facing on github: https://github.com/openzfs/zfs/issues/16697In short, I have a VM with 32vCPUs and 64GB RAM, ARC is limited to 32GB RAM. RAIDZ1 pool with...
View ArticleZFS deduplication
This is my first post on this website so please be kind with me :)On Centos 7, using ZFS deduplication in the past on a storage pool, I moved all file-systems that dedup was on to another storage...
View ArticleHow to move a *deduped* ZFS filesystem from one pool to another
I have a ZFS filesystem which uses dedup [1]. I'm trying to migrate it to a different pool by using zfs send | zfs receive (as described in Moving a ZFS filesystem from one pool to another for...
View ArticleIs it possible to detach and reattach a ZFS disk without requiring a full...
I have a ZFS mirrored pool with four total drives. Two of the drives are intended to be used for rotating offsite backups. My expectation was that after the initial resilvering I could detach and later...
View ArticleBash script error when trying to create a snapshot
I am trying to create a snapshot using Bash script as below but error occurred.Environment: FreeBSD,Version: 13.2,Script: Bash#!/usr/local/bin/bashname="17102023_1234"zfs snapshot data/library@$namerun...
View ArticleHow to remove a vdev device from a Solaris 10 ZFS pool
I added a disk to a Solaris 10 server and was trying to add the device to an existing single disk pool as a mirrored device however, instead of using the "zpool attach tank c1t5d0" command, I used...
View ArticleDoes ZFS have persistent inode numbers or something similar?
I am wondering if ZFS has persistent inode numbes for files, like EXT does, or if it has something similar with which individual files can be identified even if they are moved or renamed. And will...
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