Top all-time · #7913
Plakar
Company blog · plakar.io/posts · on HN as mrflopsystemsprogrammingdata
Plakar is the company blog at plakar.io, writing about systems, programming and data. Since 2025, 10 different Hacker News readers have linked it 20 times, most often “Go-CDC-chunkers: chunk and deduplicate everything”. It is still writing: the last post was on 2026-10-27, and you can follow it by feed.
Too few sampled comments (2) to say how often HN recommends it.?
Why HN links it
HN readers link Plakar's site for its open-standard backup and restore project. One thread cites its ptar archive work, which led to a standalone open-source tool for reading and writing ptar archives.
Summarised by Claude from a sample of 2 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Enterprise ready backups with developer friendly tooling. Encrypted, deduplicated snapshots, instant browsing and restore, and zero knowledge workflows across clouds and on-prem.
Most-linked posts?
- Go-CDC-chunkers: chunk and deduplicate everything2 people · 2 mentions · first linked 2025-07-15
- We built an immutable, content-addressed data store for backups in Go2 people · 2 mentions · first linked 2025-07-09
What Hacker News says?
Plakar is a new project out there that is interesting.... lots of cool stuff happening. https://plakar.io/
Comment linking /
on “Borg – Deduplicating archiver with compression and encryption”Submitted Ptar: Replacing .tgz for petabyte-scale S3 archives as a story · 57 points
HN discussionYes, both ptar and plakar. If you want to read more about the internal: https://www.plakar.io/posts/2025-04-29/kloset-the-immutable-...
Comment linking /posts/2025-04-29/kloset-the-immutable-data-store/
on “Ptar: Replacing .tgz for petabyte-scale S3 archives”Submitted Go-CDC-chunkers: chunk and deduplicate everything as a story · 14 points
HN discussionThey mention in the article that some people don't want to install the full Plakar backup software just to read and write ptar archives; so a dedicated open-source tool is offered for download as of yesterday: https://plakar.io/posts/2025-07-07/kapsul-a-tool-to-create-a...
Comment linking /posts/2025-07-07/kapsul-a-tool-to-create-and-manage-deduplicated-compressed-and-encrypted-ptar-vaults/
on “Ptar: Replacing .tgz for petabyte-scale S3 archives”Submitted It doesn't make sense to wrap modern data in a 1979 format, introducing .ptar as a story · 14 points
HN discussionSubmitted Replacing .tgz for petabyte-scale S3 archives as a story · 13 points
HN discussionSubmitted Show HN: Plakar 1.0.4 – Open-Source Backup That's Fast, Encrypted, and Browsable as a story · 8 points
HN discussionSubmitted Backing up Kubernetes clusters with Plakar as a story · 4 points
HN discussionSubmitted Go-CDC-chunkers: chunk and deduplicate everything as a story · 3 points
HN discussionSubmitted It doesn't make sense to wrap modern data in a 1979 format, introducing .ptar as a story · 3 points
HN discussionSubmitted We got content-defined chunking from 555 MB/s to 21 GB/s as a story · 1 points
HN discussionSubmitted Using content-defined chunking to save space on PostgreSQL backups as a story · 1 points
HN discussionSubmitted We built an immutable, content-addressed data store for backups in Go as a story · 1 points
HN discussionSubmitted Content Defined Chunking for Go as a story · 1 points
HN discussionSubmitted Content-defined chunking in Go: 3.7 GB/s and a third less memory as a story · 1 points
HN discussionSubmitted Plakar: Open-source backup tool, 95% faster restores in v1.1.3 as a story · 1 points
HN discussionSubmitted Backing Up PostgreSQL with Plakar as a story · 1 points
HN discussionSubmitted Storing Backups in an OCI Registry as a story · 1 points
HN discussionSubmitted CDC Attack Mitigation in Plakar as a story · 1 points
HN discussion