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dch :flantifa: :flan_hacker:
@dch@bsd.network  ·  activity timestamp 3 hours ago

@jimsalter @joeress here's one for your 2.5 admins. #25admins #zfs #postgresql

https://matrix.org/blog/2025/10/post-mortem/ great write-up and #HugOps to those involved over that very stressful period.

- it's great to see they had a comprehensive backup/recovery strategy in place
- well done, really well done. Multiple fallback layers. Sad that they had to use them, but hey that's why we do this.
- Kudos to @beasts hosting for moral & technical support, once again I keep hearing good things about them

A story in SQL backup/recovery from matrix.org with three key lessons:

- always do critical recovery work with 2+ people checking and reviewing together (they did this), and rotate regions because sleep is critical
- never actually delete stuff during a crisis. Ever (narrator: they learned this the hard way)
- ZFS would have made this recovery significantly easier, in so many ways

It would have been almost trivial to recover from their failed storage with ZFS, and perhaps avoid either the failover, or the remote restore.

Scheduled ZFS snapshots would have meant a rollback instead of a recover in at least 2 of their high-risk moments.

It would have also meant higher storage costs because snapshots are almost but not quite free.

ZFS snapshots can be sent/received from an alternate system, over LAN at very high rates, much much faster than a remote S3-based streaming restore.

Post-mortem of the September 2 outage

Matrix, the open protocol for secure decentralised communications
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Stefano Marinelli
@stefano@mastodon.bsd.cafe  ·  activity timestamp yesterday

Removing 10TB of old backups made my backup server extremely happy

#ZFS

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Phillip Vuchetich
@philvuchetich@bsd.network  ·  activity timestamp 2 days ago

Thanks @dexter and team for the #zfs #openzfs Summit over the previous several days. I couldn't participate in person or watch live, but am watching the recordings. The constructive dialogue is awesome - as one paraphrased example... 'I don't know whether the redact feature would work in that way...' followed by a response 'well, I wrote that function, and it works like this...', followed by open group discussion of various use cases and optimization of backup/restore.

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Phillip Vuchetich
@philvuchetich@bsd.network  ·  activity timestamp 2 days ago

Thanks @dexter and team for the #zfs #openzfs Summit over the previous several days. I couldn't participate in person or watch live, but am watching the recordings. The constructive dialogue is awesome - as one paraphrased example... 'I don't know whether the redact feature would work in that way...' followed by a response 'well, I wrote that function, and it works like this...', followed by open group discussion of various use cases and optimization of backup/restore.

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Paco Hope #resist
@paco@infosec.exchange  ·  activity timestamp 3 days ago

Any #ZFS folks want to offer me an opinion on the following? I have 2 ZFS pool of raidz2 with 7 2TB SAS drives each (about 11.5T). I want to add a LOG drive. I have a single SAS SSD that's 300G. When I suggested using a 1TB LOG drive earlier, someone said that was way too much. (which is why I picked up a used 300G SSD)

My question is whether it makes sense (is possible) to partition that drive into 2 partitions and have one pool use 1 partition as a log drive (e.g., 150G) and the other pool use the other partition as a log drive on the same physical device.

Is this going to be worse because it's just too much IO on one device? Is it reasonable? Any other ideas?

Thanks
#homelab #linux #selfhost

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vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 4 days ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟮𝟳 (Valuable News - 2025/10/27) available.

https://vermaden.wordpress.com/2025/10/27/valuable-news-2025-10-27/

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#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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Valuable News – 2025/10/27

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX/BSD/Linux systems. Whenever I stumble upon…
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News

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vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 4 days ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟮𝟳 (Valuable News - 2025/10/27) available.

https://vermaden.wordpress.com/2025/10/27/valuable-news-2025-10-27/

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#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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Valuable News – 2025/10/27

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX/BSD/Linux systems. Whenever I stumble upon…
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fosdembsd
@fosdembsd@mastodon.bsd.cafe  ·  activity timestamp 5 days ago

For the upcoming Fosdem, we submit a common devroom titled "BSD, illumos, bhyve, OpenZFS".

Our proposal was accepted 🥳 !
The devroom will take place Saturday 31 January afternoon.

#illumnos #Fosdem2026 #FreeBSD #NetBSD #ZFS #bhyve

The CFP will be published in the upcoming days!

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Alauddin Maulana Hirzan 💻
@maulanahirzan@mastodon.bsd.cafe  ·  activity timestamp 4 days ago

Bastille on ZFS behaves weirdly. This problem never occured before. I can use it normally, the zfs volume is exist. But the message is kinda annoying. What should I do?

#bastille #zfs #freebsd

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fosdembsd
@fosdembsd@mastodon.bsd.cafe  ·  activity timestamp 5 days ago

For the upcoming Fosdem, we submit a common devroom titled "BSD, illumos, bhyve, OpenZFS".

Our proposal was accepted 🥳 !
The devroom will take place Saturday 31 January afternoon.

#illumnos #Fosdem2026 #FreeBSD #NetBSD #ZFS #bhyve

The CFP will be published in the upcoming days!

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Stefano Marinelli boosted
vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟮𝟬 (Valuable News - 2025/10/20) available.

https://vermaden.wordpress.com/2025/10/20/valuable-news-2025-10-20/

Past releases: https://vermaden.wordpress.com/news/

#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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Valuable News – 2025/10/20

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX/BSD/Linux systems. Whenever I stumble upon…
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News

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX or BSD systems. Whenever I stumble upon so…
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vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟮𝟬 (Valuable News - 2025/10/20) available.

https://vermaden.wordpress.com/2025/10/20/valuable-news-2025-10-20/

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#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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Valuable News – 2025/10/20

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX/BSD/Linux systems. Whenever I stumble upon…
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News

The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX or BSD systems. Whenever I stumble upon so…
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Larvitz
@Larvitz@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

Time for the weekly sunday-backup of my home-server:

1. Plug USB HDD
2. zpool import zusb
3. zfs snapshot -r zroot@backup-$(date +%Y%m%d)
4. zfs send -R -i zroot@backup-$(date +%Y%m%d) | zfs receive -o mountpoint=none zusb/backup_zroot
5. zpool export zusb
6. Unplug HDD

#freebsd #zfs #backup

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Larvitz
@Larvitz@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

Time for the weekly sunday-backup of my home-server:

1. Plug USB HDD
2. zpool import zusb
3. zfs snapshot -r zroot@backup-$(date +%Y%m%d)
4. zfs send -R -i zroot@backup-$(date +%Y%m%d) | zfs receive -o mountpoint=none zusb/backup_zroot
5. zpool export zusb
6. Unplug HDD

#freebsd #zfs #backup

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Stefano Marinelli boosted
Eva Winterschön
@winterschon@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

🎁 Dev Box DPU Upgrade 🎁

More ZFS PoC for vGPU + DOCA blah blah NVMe-oF offloads

Left–to–Right (lotta slots)
- Broadcom CNA 2x10G
- Optane P3608 2x 2TB NVMe AIC
- Nvidia T10 16GB GPU (w/ 90mm blower)
- blank
- Nvidia T10 16GB GPU (w/ 90mm blower)
- Nvidia Bluefield2 DPU 16GB RAM, 2x 25G
- Optane 4x 512GB NVDIMM
- Samsung 4x 32GB ECC Volatile
- Intel Xeon 8370C (Azure) 32C/64T 270W

Chassis cooled by 2x 180mm, 1x 140mm, 1x 120mm. Idles very comfortably below 40dB, wind-tunnel at full rpm is more like whoooooshing than the usual 28K-RPM 40mm axial fan screamers people expect from enterprise hardware. Choose wisely.

#gpu #dpu #ai #dev #llm #nvidia #intel #optane #zfs #linux #freebsd

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Eva Winterschön
@winterschon@mastodon.bsd.cafe  ·  activity timestamp 2 weeks ago

🎁 Dev Box DPU Upgrade 🎁

More ZFS PoC for vGPU + DOCA blah blah NVMe-oF offloads

Left–to–Right (lotta slots)
- Broadcom CNA 2x10G
- Optane P3608 2x 2TB NVMe AIC
- Nvidia T10 16GB GPU (w/ 90mm blower)
- blank
- Nvidia T10 16GB GPU (w/ 90mm blower)
- Nvidia Bluefield2 DPU 16GB RAM, 2x 25G
- Optane 4x 512GB NVDIMM
- Samsung 4x 32GB ECC Volatile
- Intel Xeon 8370C (Azure) 32C/64T 270W

Chassis cooled by 2x 180mm, 1x 140mm, 1x 120mm. Idles very comfortably below 40dB, wind-tunnel at full rpm is more like whoooooshing than the usual 28K-RPM 40mm axial fan screamers people expect from enterprise hardware. Choose wisely.

#gpu #dpu #ai #dev #llm #nvidia #intel #optane #zfs #linux #freebsd

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vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 3 weeks ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟭𝟯 (Valuable News - 2025/10/13) available.

https://vermaden.wordpress.com/2025/10/13/valuable-news-2025-10-13/

Past releases: https://vermaden.wordpress.com/news/

#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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News

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vermaden
@vermaden@mastodon.bsd.cafe  ·  activity timestamp 3 weeks ago

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟱/𝟭𝟬/𝟭𝟯 (Valuable News - 2025/10/13) available.

https://vermaden.wordpress.com/2025/10/13/valuable-news-2025-10-13/

Past releases: https://vermaden.wordpress.com/news/

#verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

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News

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Shawn Webb
@lattera@bsd.network  ·  activity timestamp 3 weeks ago

Today, I'm grateful for #ZFS. I'm grateful that taking snapshots of #bhyve VMs is so easy.

I attempted an update of a #Debian VM from 12 to 13, but I realized a piece of software I need doesn't support Debian 13 just yet (I suspect it will relatively soon.)

I had thought to power the VM off, take a snapshot of it, and then attempt the update.

It wasn't until after the update completed (successfully) that I realized the issue with the third-party software.

I just powered the VM down and reverted back to the snapshot.

It's as if nothing ever happened.

I know, it's a simple feature. Most other virtualization solutions also provide snapshotting. It's just nice that it's integrated into my host OS.

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Jaap de Vos
@jaap@mastodon.bsd.cafe  ·  activity timestamp 3 weeks ago

Really nice article about some ZFS basics, written by Klara Systems: https://klarasystems.com/articles/advanced-zfs-dataset-management/

#zfs #openzfs #klarasystems

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