Sign in

Allan Jude

@allanjude.com
493 followers 55 following 33 posts

Co-founder of @klarainc.bsky.social where I work on #OpenZFS and #FreeBSD. Co-host of 2.5admins.com weekly podcast

PostsRepliesMedia
Reposted by Allan Jude
Miguel de Icaza @migueldeicaza.bsky.social · 24/09/2026
From twitter bad_pote
511730
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 23/07/2026
One of the most interesting conversations at BSDCan wasn't about a new feature—it was about where FreeBSD could go next. For @allanjude.com, it was the conversations around FreeBSD jails and ongoing work to improve namespacing. Watch more: na3.hubs.ly/y0xGnP0 #FreeBSD #BSDCan
na3.hubs.ly
FreeBSD After Hours AMA: Post-BSDCan Recap - Klara Systems
Join Klara for the BSDCan 2026 FreeBSD AMA and hear the biggest BSDCan takeaways, FreeBSD updates, OpenZFS discussions, and production-focused insights from Allan Jude and Kyle Evans.
013
Reposted by Allan Jude
Michael W|Warren Lucas @mwl.io · 23/07/2026
dived into Linux kernel modules today and got some missing tidbits of #openzfsmastery filled in so @allanjude.com can take a look. But I also got to use the phrase "Oracle taint," so the day wasn't a total loss. I'd appreciate your support writing this book. mwl.io/sponsor
mwl.io
OpenZFS Mastery Sponsor
This book does not exist yet. This sponsorship supports writing it. Epub sponsors get their names in the epub/mobi versions of the book. They will receive a free copy of the completed ebook in epub a...
061
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 23/06/2026
BSDCan 2026 is in the books, but there's still plenty to discuss. Join @allanjude.com, Kyle Evans, and Colin Percival next week for a live AMA covering conference highlights, FreeBSD developments, and audience Q&A. Register here: na3.hubs.ly/y0vP1c0 #BSDCan #FreeBSD #OpenSource
021
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 15/06/2026
What if your ZFS vdevs didn't require matching drive sizes? At BSDCan 2026, @allanjude.com will break down AnyRAID—a new ZFS vdev type that unlocks more usable capacity, mixed-drive flexibility, and easier expansion over time. 👉 www.bsdcan.org/2026/timetab... #BSDCan #FreeBSD
073
Reposted by Allan Jude
Foxes In Love @foxes-in-love.bsky.social · 08/06/2026
A comic of two foxes, one of whom is blue, the other is green. In this one, Green is carrying Blue on top of his head. Blue looks wide-eyed and stunned, completely wrung dry and shriveled, hanging limp like a rag.
Narration: How to revive an oversocialised introvert:
1. Gently remove from crowds.

Green gently lowers shriveled Blue into a metal stock pot. The pot's lid is leaning against the pot on the side.
Narration: 2. Place in a chilled, dark and quiet place, away from strong smells and sounds.

Sitting down to wait next to the now lidded pot, Green reads a newspaper.
Narration: 3. Let simmer until normal.

Green turns to look towards the pot as Blue peers out, still not fully recovered but now looking much more like his regular self.
Green: Feeling any better yet?
Blue: A little.
4280432003
Allan Jude @allanjude.com · 07/06/2026
With the return of Bruce A-3 to service, Ontario has broken 10,000 MW of generation from Nuclear for what I believe is the first time in some years. It won't last too long, as Bruce B-5 will enter is refurbishment cycle later this year, with units 7 and 8 to follow. live.gridwatch.ca
live.gridwatch.ca
Gridwatch
See where your power comes from, when the grid is clean and when it's not.
000
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 27/05/2026
We're starting soon! Join @allanjude.com and @lawrencesystems.com for a practical session on tuning ZFS for database performance. Latency, IOPS, bottlenecks, caching, compression, and safe production tuning for PostgreSQL, MySQL, and Oracle. 👉 Join the party: na3.hubs.ly/y0sW3-0
na3.hubs.ly
Database Performance on ZFS: Tuning for Latency and IOPS - Klara Systems
Join the webinar to optimize ZFS database performance—improve latency and IOPS, identify bottlenecks, and tune safely.
011
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 25/05/2026
What happens when database workloads meet NVMe storage on ZFS? Join @lawrencesystems.com & @allanjude.com for a webinar on tuning ZFS for latency and IOPS across PostgreSQL, MySQL, and Oracle. Save your spot: na3.hubs.ly/y0sW6J0
043
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 21/05/2026
Tuning ZFS for databases shouldn’t feel like guesswork. Next week @allanjude.com & @lawrencesystems.com break down safe ways to improve latency + IOPS. Real bottlenecks. Real metrics. No risky changes. 👉 Register: na3.hubs.ly/y0sW6J0
032
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 20/05/2026
Modern media production isn’t one workload—it’s many. ZFS lets each dataset be tuned for its job: large renders, small database I/O, or mixed editorial files—all on the same pool. In a real NVMe environment: 55+ GiB/s reads, 35 GiB/s writes, up to 123% gains. 👉 Read: na3.hubs.ly/y0tj-_0
na3.hubs.ly
Why ZFS Is the Ideal Filesystem for Multi-User Media Production
ZFS for media production delivers high performance, workload-specific tuning, and reliable data protection for animation and VFX studios.
023
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 05/05/2026
@lawrencesystems.com joins @allanjude.com for a live ZFS webinar. Tuning for Latency + IOPS 📅 May 27 Cut latency, boost IOPS, and find real bottlenecks—without risking production. PostgreSQL, MySQL, Oracle. Real-world tuning. Save your spot → na3.hubs.ly/y0sj110
012
Reposted by Allan Jude
Moo Yu (Mythmatch on Switch and Steam Now!) @oneofmoo.bsky.social · 26/03/2026
Made very few changes to the latest build and was thinking maybe I'll be able to ship this one without incrementing the shame version (last number in a version number) and 2 minutes into testing, it's already getting bumped.
A graphic showing "Pride Versioning" where the first number is the Proud Version. Then second is the Default Version. And the last number is the Shame Version.
281484240
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 25/03/2026
Technical independence starts with infrastructure. Open technologies like FreeBSD and OpenZFS give organizations transparency, control, and the ability to build storage systems without vendor lock-in. 🔗: na3.hubs.ly/y0ppZy0
na3.hubs.ly
FreeBSD and OpenZFS in the Quest for Technical Independence
Technical independence in storage architecture requires control over data, hardware, and software. Learn how FreeBSD and OpenZFS enable an open, portable infrastructure.
021
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 16/03/2026
Enable fast, transparent compression with: zfs set compression=lz4 pool/fs lz4 reduces storage footprint with virtually no performance penalty — often improving throughput while saving space. One simple command. Immediate efficiency gains. #ZFS #OpenZFS #Klarasystems
001
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 04/02/2026
Teams are rethinking where their critical systems live. OpenZFS stands out in production—open source, proven at scale, no licensing traps—but expert support matters. Save up to 35% on Klara’s OpenZFS support through Feb 17, 2026. Get tuning and long-term support: na3.hubs.ly/y0hn9K0
022
Reposted by Allan Jude
fo0 @fo0.trollab.org · 08/12/2025
WOW !! A research team at the University of Utah discovered a version of the original #UNIX operating system from 1973. www.youtube.com/watch?v=IR-f...
a version of the original UNIX operating system from 1973
0126
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 01/12/2025
Replicate VM datasets between Proxmox nodes using native ZFS tooling. zfs send -c pool/vmdata@snap | zfs receive backup/vmdata Compression reduces transfer time, while ZFS checksums ensure what arrives is exactly what you sent.
022
Reposted by Allan Jude
Peter N. M. Hansteen (@pitrh@mastodon.social) @pitrh.bsky.social · 01/12/2025
The Call for Papers for #bsdcan is open, see www.bsdcan.org/2026/papers.... and nxdomain.no/~peter/what_... for some background (f you want to explain to less BSD-savvy friends) #bsdcan #bsd #freebsd #netbsd #openbsd #freesoftware #libresoftware #development #sysadmin #devops #conference
bsdcan.org
Call for papers — BSDCan
BSDCan is a technical BSD conference held in Ottawa, Ontario, Canada.
033
Reposted by Allan Jude
The C Programming Language @c-official.bsky.social · 28/11/2025
Fun fact: while many other languages have syntactic sugar, C is the only language with syntactic hydrochloric acid
418942
Reposted by Allan Jude
Michael W|Warren Lucas @mwl.io · 19/11/2025
Me. @allanjude.com. #ZFS. 40 minutes from now. #sysadmin klarasystems.com/webinars/zfs...
klarasystems.com
ZFS Mastery: The Bits They Don't Put in the Man Pages - Klara Systems
Join this live webinar on ZFS tuning best practices with Allan Jude and Michael W. Lucas. Learn hard-won lessons from running ZFS in production, practical tuning tips, and insights you won’t find in t...
042
Reposted by Allan Jude
tweety fish @sifu.tweety.fish · 18/11/2025
cloudflare's on-duty IT staff bangs on the doors which I have padlocked from the inside as I calmly break open lava lamp after lava lamp and drink the contents
172095545
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 20/10/2025
Klara’s is going to the OpenZFS Developer Summit and will be presenting! - 10 AM – AnyRaid with Paul Dagnelie - 1 PM-1:50 PM – Large Label & Blockpointer-V2 with Allan Jude - 2:30 PM – QLC NAND: When the hardware needs help from the filesystem with Allan Jude Learn More: bit.ly/3J7WbbH
041
Reposted by Allan Jude
Chris Vermilion @verm.me · 04/10/2025
Went apple picking today. You never know where you’ll find unpatched OpenSSL in the wild.
A red apple with a heart-shaped patch of yellow-green that blurs at the lower edge. If you squint it looks like the Heartbleed logo.
213324
Reposted by Allan Jude
Jim Salter @jimsalter.bsky.social · 02/10/2025
2.5 Admins 267: Hoarding Cache The weird errors you see when your root partition is full, TikTok uses a lot of bandwidth by preloading videos, and dealing with a ZFS pool that won’t import. 2.5admins.com/2-5-admins-2...
2.5 admins podcast logo
151
Allan Jude @allanjude.com · 26/09/2025
A few weeks ago I got to hang out with @lawrencesystems.com in person for a couple of days. Many great chats inspired a YouTube video where we talked more about the future of ZFS and NVMe: youtu.be/BjOkWTeZJDk?... Check it out
youtu.be
Is ZFS Ready for NVMe Speed? Allan Jude Explains
YouTube video by Lawrence Systems
073
Reposted by Allan Jude
🎃 Spooky Shoshana 🎃 @shoshana.bsky.social · 21/09/2025
I have friends that believe you should do everything possible via the command line You know, CLImaxing
513622
Reposted by Allan Jude
David Monniaux @monniauxd.bsky.social · 15/09/2025
And this is why the emergency shutdown system acts automatically without user input and cannot be disabled.
0188
Reposted by Allan Jude
qntm @qntm.org · 07/09/2025
ME, IN TEARS: you can't just say every single part of a computer system is a file UNIX, POINTING AT THE MOUSE: file
392325506
Reposted by Allan Jude
Ian Coldwater 🧊🚫 @lookitup.baby · 29/08/2025
my mom to my kid: have you ever actually dialed a phone? my kid: yeah! I did it in a museum 💀
3982146
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 01/07/2025
Leverage OpenZFS for your Infrastructure storage. Our latest white paper explores how scalable, high-performance storage solutions can optimize your IT infrastructure. Gain insights, case studies & best practices. Download our whitepaper: klarasystems.com/content/open...
bit.ly
White Paper: Leverage OpenZFS for Infrastructure Storage
Learn how OpenZFS infrastructure storage enhances data integrity, performance, and flexibility for modern IT environments in this white paper.
021
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 26/06/2025
Don't let bugs in OpenZFS slow you down. Klara’s ZFS experts help you investigate, patch, and protect your infrastructure. Start today: klarasystems.com/zfs/solution...
klarasystems.com
ZFS Bug Investigation - Klara Systems
Resolve critical OpenZFS issues with Klara’s bug investigation and patching. Expertly debug and adapt software to ensure security and stability.
031
Reposted by Allan Jude
Jen Gentleman @jenmsft.bsky.social · 24/06/2025
When you're addicted to only fans
A computer tower which is covered in fans. It's a post to the PC master race subreddit, with the title "over chill?"
1831049
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 17/06/2025
RAID is not a backup, it protects availability and uptime, not your data. Pair RAID with a full disaster recovery plan to ensure both the availability and resiliency of your data. Good backups start with one simple question: What are you protecting your data from?
152
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 18/06/2025
Remember to join us and learn about how ZFS Fast Dedup makes for smarter storage for modern container workloads. Join now: bit.ly/4mM9r4H
bit.ly
Fast Dedup with ZFS: Smarter Storage for Modern Workloads - Klara Systems
Learn how Fast Dedup with ZFS improves storage efficiency. Join experts from TrueNAS and Klara Inc. to explore real-world use cases.
022
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 17/06/2025
Join TrueNAS & Klara to learn how Fast Dedup in OpenZFS makes storage smarter and more efficient. Save your spot: bit.ly/4mM9r4H
bit.ly
Fast Dedup with ZFS: Smarter Storage for Modern Workloads - Klara Systems
Learn how Fast Dedup with ZFS improves storage efficiency. Join experts from TrueNAS and Klara Inc. to explore real-world use cases.
111
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 05/06/2025
With ZFS, encryption happens at the dataset level—so you can manage, scrub, or repair your pool without unlocking all your data. Smarter, safer workflows. Partner with Klara: bit.ly/4dSNhtJ
185
Allan Jude @allanjude.com · 06/06/2025
We've been telling people for decades that ZFS Dedup isn't good. Now we've fixed it, Fast Dedup makes many workloads able to take advantage of this core ZFS feature. Come learn more about deploying Fast Dedup for modern workloads.
000
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 04/06/2025
In our latest webinar, we shared how Klara enhanced a customers FreeBSD-based system by limiting debugger access, protecting sensitive memory, like VPN keys, without losing the ability to debug in production. Next up: Fast Dedup with ZFS >> bit.ly/4mM9r4H
041
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 03/06/2025
As we gear up for BSDCan 2025, we look back at last years talk by @allanjude.com on supporting FreeBSD in the field—full of real-world stories and lessons. We look forward to seeing you at BSDCan on June 11! Watch here: bit.ly/3Zab3v6
bit.ly
Supporting FreeBSD in the Field By: Allan Jude
Allan from Klara Systems shares a series of stories from supporting users deploying FreeBSD in the field across various industries. These stories come from the silent users of FreeBSD, those that the community often do not know or hear about. Be that because they happen in the quieter corners of industry, where it is not common to discuss the technical challenges you face or how you overcame them, or just from people who are not well connected to the community, or choose not to make waves. These stories provide insight into how FreeBSD gets used beyond the stories we already know, how it is used in industries that never mention what OS they use, or where you might never expect to find FreeBSD. Sharing these stories can help the community ensure these users continue to get the most out of FreeBSD.
011
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 02/06/2025
Explore OpenZFS snapshots & backups—best practices & use cases. Learn more: klarasystems.com/articles/ope...
klarasystems.com
ZFS Backup Best Practices and Use Cases – OpenZFS Snapshots
Explore ZFS backup best practices and storage optimization. Learn how to configure OpenZFS snapshots for reliability and efficiency.
022
Reposted by Allan Jude
Ryan Castellucci 🜬 @rya.nc · 25/05/2025
Sorry, I accidentally some words here. I found an integer overflow in a terminal emulator written in Rust.
281
Reposted by Allan Jude
nixCraft @cyberciti.biz · 23/05/2025
chat is this for real? 🫣 sadly it is www.reddit.com/r/ableton/co... i hope you learned lessons and not trusting it blindly
Screenshot of a Reddit post on r/ableton where a user lost a year's worth of Ableton projects. They ran a terminal script provided by ChatGPT to organize files, which included the command rm -rf "$ROOT/Projects" "$ROOT/Sessions" "$ROOT/Audio Files", accidentally deleting everything without a backup.
17949
Allan Jude @allanjude.com · 21/05/2025
"In defense of my loud keyboard"
160
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 20/05/2025
ZFS just got smarter at spreading writes across your disks. The new Unified Allocation Throttling (PR17020) fixes major flaws in how space was balanced across vdevs—meaning less fragmentation, better performance, and more efficient use of your storage. Big news if you’re running ZFS at scale!
085
Reposted by Allan Jude
nixCraft @cyberciti.biz · 16/05/2025
You underestimate the importance of such meetings. It might give you valuable pointers for your career in software development. Khaha
A two-panel meme about programming languages.

Panel 1: An A-frame sign on a sidewalk reads "UNHATED LANGUAGES ANNUAL MEETING" with an arrow pointing left.

Panel 2: Inside a large meeting room, a single character, labeled "C", sits alone at a long conference table surrounded by many empty chairs.
5674
Reposted by Allan Jude
Thomas Fuchs 🫯 @thomasfuchs.at · 16/05/2025
I always think of this when someone says they do everything with AI now
Google search for “bees in my computer”, yielding the “AI Overview” of “Bees can be present in desktop computers built after the mid-2000s, but only at a microscopic level. These bees are a special breed of Apis Arithmeticam that perform basic computations in the CPU.”

(This was a few months ago, I think they fixed it.)
431613385
Reposted by Allan Jude
BSDCan @bsdcan.bsky.social · 12/05/2025
@bsdcan 2025 Info: Tutorials: June 11-12, 2025 Conference: June 13-14, 2025 full list of talks here: indico.bsdcan.org/event/5/cont... North Americas biggest *BSD Event. 3 rooms, 2 days, Zero filler. Plus we have tutorials, Shawarma, and a fun auction at the end. #bsdcan
indico.bsdcan.org
BSDCan 2025
044
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 12/05/2025
Why choose FreeBSD for embedded? Clean licensing, full control, and rock-solid reliability. Read more on why its the top choice: klarasystems.com/articles/why...
klarasystems.com
Why FreeBSD is the Right Choice for Embedded Devices - Klara Systems
FreeBSD is the best choice for embedded devices, offering flexibility, performance, and true open-source freedom—without GPL restrictions.
063
Reposted by Allan Jude
Klara Inc @klarainc.bsky.social · 07/05/2025
Upstream Contribution reduces technical debt and will future proof your product. Our latest article explores how upstreaming reduces operational and engineering costs, the challenges of upstreaming and and presents a practical upstreaming strategy. Read the full article: bit.ly/44WRaew
klarasystems.com
Maintaining FreeBSD in a Commercial Product - Why Upstream Contributions Matter
Treating the upstream project as part of your roadmap reduces tech debt, streamlines upgrades, and keeps your FreeBSD-based product sustainable.
043