Added 𝗨𝗣𝗗𝗔𝗧𝗘 𝟭 - 𝗔𝗱𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀 𝗮𝗻𝗱 𝗖𝗹𝗮𝗿𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 [UPDATE 1 - Additional Features and Clarification] to the 𝗙𝗿𝗲𝗲𝗕𝗦𝗗 𝗜𝗺𝗮𝗴𝗲 𝗕𝘂𝗶𝗹𝗱𝗲𝗿/𝗜𝗻𝘀𝘁𝗮𝗹𝗹𝗲𝗿 𝘃𝗲𝗿𝗶𝗺𝗴(𝟴) 𝗧𝗼𝗼𝗹 article.

vermaden.wordpress.com/2026/04/15/f...

#verblog #freebsd #verimg

Optimizing OpenZFS for Fastmail’s High-Density Email Storage Platform - Klara Systems How Klara helped Fastmail optimize ZFS for an email storage platform, resolving CPU and memory issues at scale and upstreaming fixes to OpenZFS.

Fastmail runs a globally active email platform with tens of millions of small files on NVMe-backed OpenZFS.

When unexpected CPU and memory behavior appeared under real production load, they turned to Klara for help!

👉 Read the full case study: bit.ly/4pSpvCo

OpenZFS lets you replicate data beyond your environment while keeping encryption keys under your control.
Use third-party storage without exposing your data.
▶️ Full webinar on demand
na3.hubs.ly/y0pGVM0

ZFS dedup used to mean high overhead. Fast Dedup is changing that.

See how it works with compression, snapshots, and cloning—and which workloads benefit most.

📅 April 29 | 8 AM PDT, 11 AM EDT
Register: na3.hubs.ly/y0r1Ts0

Registration - BSDCan BSDCan is a technical BSD conference held in Ottawa, Ontario, Canada.

Have you been wondering about ZFS AnyRAID? Allan Jude will be giving a talk about Flexible Disk Layout @ BSDCan

If you register before May 1, the closing reception is free!

Register at www.bsdcan.org/2026/registr...

#bsdcan #conference #bsd #unix #development #freebsd #netbsd #openbsd
#sysadmin

Schedule - BSDCan BSDCan is a technical BSD conference held in Ottawa, Ontario, Canada.

The BSDCan 2026 Schedule has been posted. 30 regular talks, one set of lightning talks, and one Audio BoF.

Both FreeBSD and NetBSD will be holding two day Dev Summits across the hall from each other in DMS.

Schedule: www.bsdcan.org/2026/schedul...
Registration: www.bsdcan.org/2026/registr...

L2ARC won’t replace RAM—but it can recover performance when memory is tight.

The catch: every cached block still consumes ARC memory.
Sizing and tuning matter.

A deep dive into using L2ARC effectively on OpenZFS ↓
na3.hubs.ly/y0r5zs0

How Entersekt Runs Security-Critical Systems on FreeBSD and ZFS - Klara Systems Learn how Entersekt built EU tech sovereignty infrastructure using open source. See how FreeBSD and ZFS deliver control, security, and long-term resilience.

If you can’t exit your infrastructure, you don’t control it.
Entersekt has run FreeBSD + OpenZFS in production for 15+ years—no backup platform, no lock-in, full control.
3–4× compression. Snapshot-based rollback. Sovereign by design.
Check out the case study: na3.hubs.ly/y0r1PT0

Don’t skip this one if you use Dedup.
"zpool prefetch -t ddt tank"
Without it, dedup starts cold after reboot. This warms the DDT into ARC so performance doesn’t lag.

#OpenZFS #Klarasystems #dedup

Agreed. We'll be here to spread the word! 👀

Meet Chris Peredun from TrueNAS!
Technical Marketing Engineer, TrueNAS Tech Talk T3 co-host, and ZFS expert with 20+ years in the field.
Hear real-world insights from a TrueNAS insider.
📅 Save your spot: na3.hubs.ly/y0pG-B0

The Hidden Value of CPU-Intensive Compression Modern CPUs have shifted the economics of storage compression. Learn how compression in OpenZFS improves performance, and caching efficiency.

Limited RAM is bottlenecking your ZFS performance?

L2ARC can extend your cache onto SSDs—but only if you size and tune it correctly.

Learn when it helps, when it hurts, and how to use it effectively 👇
na3.hubs.ly/y0qjch0#ZFSS
#klarasystems

Articles - Klara Systems Explore Klara latest articles, updates, and expert insights on FreeBSD and OpenZFS. Stay informed with community-driven content and advanced solutions.

Love our OpenZFS content? 🖥️

From deep dives to real-world storage insights, Klara’s newsletter keeps ZFS and FreeBSD practitioners up to date with expert perspectives and announcements.

Sign up so you don’t miss a thing: klarasystems.com/articles/

ZFS 2.4 introduced zfs rewrite, a clean way to reapply dataset settings to existing data.

Rewrite a file or directory in place, and ZFS treats it like the data was rewritten with itself.

Have you guys enjoyed the zfs rewrite feature?

Zero RPO ZFS for Multisite Proxmox - Klara Systems Case study: Learn how Klara designed a Proxmox high-availability architecture with ZFS to achieve zero RPO and up to 68% performance gains.

Zero RPO Across Two Data Centers. No Delay. No Gaps.

We engineered a multisite Proxmox + ZFS architecture using synchronous mirroring, cross-server NVMe pools, and failover planning to achieve zero RPO — plus up to 68% performance gains.

Check out the case study: na3.hubs.ly/y0m1mc0

One small ZFS change can save you thousands of dollars a month saved in cloud storage.

Same setup. Just smarter compression.

If you’re running workloads in the cloud, this is worth a look.
▶️ Watch the full webinar to learn how ZFS cuts costs and boosts efficiency.
na3.hubs.ly/y0pG-q0

Five-Year Storage Design with OpenZFS Learn how to design OpenZFS storage in five-year horizons with strategies for media refresh, pool expansion, and rebalancing.

Most storage arrays are bought for 3 years—but run 5, 7, or longer. In the time span, there will be at least one full drive-generation shift.

Short-term decisions create long-term lock-in. See how OpenZFS enables control by design.

Read more: na3.hubs.ly/y0pG-d0

ZFS snapshots on Proxmox make VM backups instant, consistent, and space-efficient.

A single command like `zfs snap pool/vmdata@backup` lets you capture a full system state you can roll back to in seconds.

Efficiency, reliability, and simplicity—built right into ZFS.
#ZFS #proxmox #Klarasystems

Managing Disk Arrays on FreeBSD/TrueNAS Core - Klara Systems Manage your disk array on FreeBSD and TrueNAS Core with expert tips to improve device health and simplify replacements.

Pulling the wrong disk can be worse than the failure itself.

Klara’s new guide shows how to manage FreeBSD + OpenZFS storage safely with SES mapping, persistent labeling, and proactive alerts.

Read more: klarasystems.com/articles/man...

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.

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

Sign up for our upcomging webinar - Cost-Efficient Storage on TrueNAS with Fast Dedup

For years, many admins were told to avoid enabling ZFS dedup.
Fast Dedup changes that.

In our upcoming webinar, Allan Jude from Klara Inc., and Chris Peredun, from TrueNAS, to explain how Fast Dedup works in modern ZFS environments.

Register: na3.hubs.ly/y0pdGS0

Looking to spot storage bottlenecks in real time?
`zpool iostat 1` gives you a live, second-by-second view of IOPS and bandwidth across your pools.
One straightforward command. Real-time insight into ZFS performance.

Zero RPO ZFS for Multisite Proxmox - Klara Systems Case study: Learn how Klara designed a Proxmox high-availability architecture with ZFS to achieve zero RPO and up to 68% performance gains.

43% faster random writes. 60%+ faster sequential reads. Zero RPO.

A growing ISP partnered with Klara to design resilient Proxmox VE + OpenZFS across two data centers.
See the pool layout + tuning strategy behind it.

Read more: na3.hubs.ly/y0m1mc0

Most storage arrays are bought on a 3-year plan but run 5–7+.
In that time: new drive generations, media failures, AI-driven growth.
Five-year design with OpenZFS treats vdev layout + replication as lifecycle tools — not afterthoughts.
🔗https://na3.hubs.ly/y0nDHv0
#OpenSource #Klarasystems #OpenZFS

Hyperconverged infrastructure changes the storage trust boundary.

That shift gives teams more control over how infrastructure is designed, but it also introduces architectural decisions that matter.

Watch the full webinar: na3.hubs.ly/y0kbVM0

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

Modern VDI on Proxmox: ZFS Reliability and GPU Acceleration at Lower Cost - Klara Systems Modern VDI on Proxmox using ZFS and GPU acceleration. Learn how to deliver secure virtual desktops with lower cost and no vendor lock-in.

What does hyperconverged storage actually mean?

In modern VDI setups, combining storage and the hypervisor can reduce latency by keeping data local to the compute running the workloads.

Watch the full session: klarasystems.com/webinars/mod...

#ModernVDI #OpenZFS #Klarasystems

We're one week out!

How do you maintain EU data sovereignty without locking into a vendor?
Join Allan Jude and Eirik Øverby on March 18 to learn why Entersekt chose ZFS for sovereign storage in production.

Save your spot: na3.hubs.ly/y0m-Gz0

Stop buying storage as a black box. Start designing it as an open, ZFS‑centric platform you can evolve. Open-source and OpenZFS give control, flexibility, and independence. Learn how to escape technology dependence.
🔗 na3.hubs.ly/y0n5Pf0

Unlocking Infrastructure Sovereignty: Harnessing the Power of Open Source Solutions for Business Flexibility and Cost-Effectiveness - Klara Systems Klara and Bell Technology Solutions explore data sovereignty with open source, helping businesses cut costs and avoid vendor lock-in.

SaaS made infrastructure easy but vendor lock-in daunting.
Open source restores control: source access, multi-vendor support, flexible upgrades, and safe migrations with ZFS snapshots and replication. Cloud isn’t the problem. Dependency is.
Read more: klarasystems.com/articles/unl...
#ZFS