Top all-time · #1310
Ubicloud's Blog
Company blog · ubicloud.com/blogsystemsprogramming
Ubicloud's Blog is the company blog at ubicloud.com, writing about systems and programming. Since 2023, 54 different Hacker News readers have linked it 87 times, most often “Ubicloud: Open, Free, and Portable Cloud”. It is still writing: the last post was on 2026-08-17, and you can follow it by feed.
Rarely recommended · 1 of 33 sampled comments recommend it?
Why HN links it
HN readers link Ubicloud's blog for posts on its infrastructure internals, such as block storage with SPDK, Ruby for control planes, and ARM runner benchmarks. Most comments link its product and pricing pages instead.
- Recommended for · 1 comments
- One commenter says the post on SPDK block storage was very interesting.1
Summarised by Claude from a sample of 33 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Ubicloud is an open source cloud that can run anywhere. Our cloud services include elastic compute, block storage, load balancer and firewall, managed Postgres, and GitHub Actions runners. You can self-host our software or use our managed service to reduce cloud costs by 3-10x.
Most-linked posts?
- Ubicloud: Open, Free, and Portable Cloud6 people · 6 mentions · first linked 2024-01-22
- 13 Years of Building Infrastructure Control Planes in Ruby5 people · 6 mentions · first linked 2024-08-18
- PostgreSQL and the OOM Killer: Why We Use Strict Memory Overcommit5 people · 5 mentions · first linked 2026-04-28
- /use-cases/postgresql4 people · 6 mentions · first linked 2023-12-15
- Hardware Touch, Stronger SSH4 people · 5 mentions · first linked 2025-10-15
- Show HN: Open-source x64 and Arm GitHub runners4 people · 4 mentions · first linked 2023-12-09
- /3 people · 3 mentions · first linked 2023-08-16
- /docs/about/pricing3 people · 3 mentions · first linked 2024-01-30
- ClickHouse PostgreSQL Powered by Ubicloud2 people · 3 mentions · first linked 2026-01-22
- Building block storage for the cloud with SPDK (non-replicated)2 people · 2 mentions · first linked 2024-01-05
What Hacker News says?
The cost improvements are great. If you miss the automation that AWS does for database servers consider using something like https://www.ubicloud.com/ that is great for PostgreSQL servers. On bare metal these typically also support 5x the number of IOPS without paying through the nose.
Comment linking /
on “Migrating from AWS to Hetzner”Submitted Show HN: Open-source x64 and Arm GitHub runners as a story · 475 points
HN discussionWe’ve been seeing the same trend. Lots of teams moving to Hetzner for the price/performance, but then realizing they have to rebuild all the Postgres ops pieces (backups, failover, monitoring, etc.). We ended up building a managed Postgres that runs directly on Hetzner. Same setup, but with HA, backups, and PITR handled for you. It’s open-source, runs close to the metal, and avoids the egress/I/O gotchas you get on…
Comment linking /use-cases/postgresql
on “Migrating from AWS to Hetzner”Submitted Debugging Hetzner: Uncovering failures with powerstat, sensors, and dmidecode as a story · 345 points
HN discussionCongrats on the launch, certainly good to see competition. I was reading https://www.ubicloud.com/blog/ubicloud-hosted-arm-runners-10... but seems like a bit misleading to compare an ARM workload over QEMU vs a native ARM. What about native x86 vs native x86 or at least native x86 vs native arm?
Comment linking /blog/ubicloud-hosted-arm-runners-100x-better-price-performance
on “Show HN: Open-source x64 and Arm GitHub runners”Submitted Difference between running Postgres for yourself and for others as a story · 188 points
HN discussion> One counter-intuitive thing we found is that it's slow to save and restore caches, but the machines have good CPU, so for us it's been faster to disable cache entirely and just redo everything on each build. The link to SPDK was very interesting: https://www.ubicloud.com/blog/building-block-storage-for-clo... . I use filesystems for very high performance applications, and I've found ZFS to often be the limiting fa…
Comment linking /blog/building-block-storage-for-cloud-with-spdk-non-replicated
on “Show HN: Open-source x64 and Arm GitHub runners”Submitted Life of an inference request (vLLM V1): How LLMs are served efficiently at scale as a story · 175 points
HN discussionThat's wonderful news, thank you very much for switching to an actually open license! The linked page at https://www.ubicloud.com/docs/github-actions-integration/qui... still says "Source open under the Elastic V2 license", and https://www.ubicloud.com/docs/about/pricing still says "it's open and free under the Elastic V2 license". Not sure if those were missed or if the docs just need some time to refresh from thei…
Comment linking /docs/about/pricing
on “Show HN: Open-source x64 and Arm GitHub runners”Submitted Fixing Tool-Call Accuracy in vLLM as a story · 172 points
HN discussionAmazing article! Using state machines is a must if you are building infrastructure control-planes. Was P a must, though? I am not sure. We have been building infrastructure control-planes for over 13 years now and every iteration we have built with Ruby. It worked wonders for us https://www.ubicloud.com/blog/building-infrastructure-contro...
Comment linking /blog/building-infrastructure-control-planes-in-ruby
on “Systems Correctness Practices at Amazon Web Services”Submitted Improving Network Performance with Linux Flowtables as a story · 160 points
HN discussionSimilar to https://www.ubicloud.com/ ?
Comment linking /
on “Unison Cloud”Submitted Building Burstables: CPU slicing with cgroups as a story · 130 points
HN discussionHow do they compare to Ubicloud? https://www.ubicloud.com/
Comment linking /
on “Arm64 on GitHub Actions”Submitted Virtualizing Nvidia HGX B200 GPUs with Open Source as a story · 114 points
HN discussionThe riskiest line in your repo isn’t in "src/", it’s in ".github/workflows/" Self-hosted runners feel more secure at first since they execute jobs directly on machines you manage. But they introduce new attack surfaces, and managing them securely and reliably is hard. At Ubicloud, we built managed GitHub Actions runners with security as the top priority. We provision clean, ephemeral VMs for each job, and they're fu…
Comment linking /use-cases/github-actions
on “How to harden GitHub Actions”Submitted Cloud Virtualization: Red Hat, AWS Firecracker, and Ubicloud internals as a story · 99 points
HN discussionYeah Hetzner doesn't have dedicated in the US, and not sure if it will in near/mid future. Still, Hetzner cloud is pretty good option, and there's more support coming on building on Hetzner. https://www.ubicloud.com/ (from founders of citus) is mainly/currently targeting hetzner, for example.
Comment linking /
on “Cutting down AWS cost by $150k per year simply by shutting things off”Submitted How we enabled ARM64 VMs as a story · 90 points
HN discussionThere's quite a few places around. Also Ubicloud look interesting, though I've not personally used them: https://www.ubicloud.com/use-cases/postgresql
Comment linking /use-cases/postgresql
on “ElephantSQL Is Shutting Down”Submitted Ubicloud: Open, Free, and Portable Cloud as a story · 74 points
HN discussionSurprised to not see Ubicloud in there, which provides cloud services on top of various (including European) infra providers. https://www.ubicloud.com/
Comment linking /
on “European.cloud: A Curated Directory of EU-Based Cloud Providers”Submitted Does MHz Still Matter? as a story · 66 points
HN discussionYes, it is. :) Our CTO, Daniel, described why we chose Ruby for our control plane in a blog post. https://www.ubicloud.com/blog/building-infrastructure-contro... On the data plane side, we use different open source components and our choice of programming language depends on them. For example for virtualization, we rely on Linux KVM and the Cloud Hypervisor. The former is in C and the latter in Rust.
Comment linking /blog/building-infrastructure-control-planes-in-ruby
on “Cloud Virtualization: Red Hat, AWS Firecracker, and Ubicloud internals”Submitted 13 Years of Building Infrastructure Control Planes in Ruby as a story · 42 points
HN discussionI found this article on their IAM/ABAC service interesting: https://www.ubicloud.com/docs/architecture/attribute-based-a... I always wonder how the big cloud providers manage to scale their IAM services (from a distributed systems perspective) given they presumably need both low latency and some reasonable level of consistency. Anyone have any pointers to architectural descriptions/publications?
Comment linking /docs/architecture/attribute-based-access-control-abac
on “How we enabled ARM64 VMs”Submitted Rethinking PostgreSQL Storage as a story · 25 points
HN discussion(Ozgun from Ubicloud) Hey there, I know you meant something different, but I just wanted to chime in. At Ubicloud, we're building an open source cloud and our managed solution runs on Hetzner: https://www.ubicloud.com/docs We're planning to tackle a managed k8s service next. If you have any feedback for our roadmap, could you drop us a line?
Comment linking /docs
on “Hetzner Pricing”Submitted Open and portable Postgres-as-a-service. Also available on Hetzner as a story · 22 points
HN discussion
