ZFS

using syncoid to backup ZFS snapshots – home assistant

Copies of data are good. Especially if on a different host. zfs snapshots combined with zfs send | zfs recv make replication of zfs file systems especially easy. I am already using sanoid to manage zfs snapshots. Now I’m going to use syncoid to transfer those snapshots to another host. Both sanoid and syncoid are …

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Upgrading an NVMe zpool from 222G to 1TB drives

The FreshPorts dev, test, and stage websites are hosted on a server in my basement. Each instance consists of two jails: an ingress node – for pulling in new commits (and other data) into the database. a webserver node – for displaying the web pages. The new drives: Sometimes the zpool gets too close to …

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da12 in my FreeBSD zfs array disappeared at :02 and came back at :04

This post is based on a tweet and was created after a followup incident occurred today. The post was created to consolidate the information into a blog post so I could easily find it later. Details about this host (disks, zpool, gpart, etc) are in this post. On March 15 2022, I noticed these messages …

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mps0: IOC Fault 0x40007e23, Resetting

Here I am, sitting on a beach, writing a blog post, and sipping a cool adult beverage. Reading email. I see this: I quickly ssh into the host to check zpool status: Lines 15-17 are relevant. There was a resilver event, which completed at 08:49:48 The vdev state changed event occurred at 08:49:34 That all …

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I forgot to enable compression on ZFS

I forgot to enable compression on this FreshPorts node. I have no idea why/how. After doing this, I went to a directory with a lot of space and copied stuff around. [aws-1 dan /jails/ingress01/var/db/freshports/message-queues/archive] % sudo mv 2021_03.tar.gz 2021_03.tar.gz.tmp 21:01:28 [aws-1 dan /jails/ingress01/var/db/freshports/message-queues/archive] % sudo mv 2021_03.tar.gz.tmp 2021_03.tar.gz 21:01:38 That will free up *some* space. …

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Adjusting my ZFS filesystems to conform with standard FreeBSD boot environments

Get FreeBSD 12.2 mfsBSD (because that matches the OS on slocum), burn it to a thumb drive using OSX. NOTE: the following didn’t work. I wound up not having the right values in /lib and /var/db/ I don’t know what I did wrong, but I did manage to fix them up afterwards. I suspect that …

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snapshot ; ls ; destroy; dataset is busy – WTF?

I have found this bizarre situation where a FreeBSD 12.2 snapshot cannot be destroyed. This is the simple example, which works: [dan@pkg01:~] $ sudo zfs snapshot tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ sudo zfs destroy tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ This is the simple example, which fails: [dan@pkg01:~] $ sudo zfs snapshot tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ ls /usr/local/poudriere/.zfs/snapshot/snapshot-for-backup cache data jails …

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Moving some ZFS filesystems to the ‘trash’ and removing all their snapshots – sanoid

I recently discovered that you can delete all snapshot from a ZFS filesystem with a single command. It came to me via fortune: You can delete a range of ZFS snapshots (a-z) in multiple ways. The following will delete d and all earlier snapshots: zfs destroy mypool/data@%d To delete d and all later snapshots: zfs …

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