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Odd opam update behaviour

A few days after retiring opam 2.0 from the build pipeline, ocaml-ci Jon noticed that some jobs were failing. I immediately concluded that the removal was to blame, but it wasn’t.

12 May 2026

Marc Elvers

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Apache Parquet Files

If you haven’t discovered the Apache Parquet file format, allow me to introduce it along with ClickHouse.

17 Sep 2025

Marc Elvers

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Docker Container for OxCaml

Jon asked me to make a Docker image that contains OxCaml ready to run without the need to build it from scratch.

18 Jul 2025

Marc Elvers

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Static linking in OCaml

Most of the time, you don’t think about how your file is linked. We’ve come to love dynamically linked files with their small file sizes and reduced memory requirements, but there are times when the convenience of a single binary download from a GitHub release page is really what you need.

17 Jun 2025

Marc Elvers

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Box Diff Tool

Over the weekend, I extended mtelvers/ocaml-box-diff to include the ability to upload files over 50MB. This is a more complex API which requires a call to https://upload.box.com/api/2.0/files/upload_sessions by posting JSON containing the name of the file, the folder ID and the file size. Box replies with various session endpoints which give the URIs to use to upload the parts and to commit the the file. Box also specifies the size of each part.

12 Apr 2025

Marc Elvers

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