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When the Lakehouse Works, but the Operating Model Breaks… Especially On-Premises

Note: This article was inspired by a LinkedIn post by Can Sinan A. on the hidden operational cost of an Iceberg migration, especially when governance moves from one access-control plane to several layers: catalog, storage and engine configuration Introduction Many organizations are modernizing their data platforms with lakehouse architectures. The Read more

By Julien Laurenceau, 4 months2026-05-04 ago
ceph

Migrating Unmanaged OSDs to Managed OSDs in Ceph Squid

If you are running Ceph Squid with a mix of managed and unmanaged OSDs, there is one thing worth stating clearly upfront: There is no in-place adoption mechanism in Squid. You cannot “import” an existing OSD into the orchestrator. If an OSD was deployed manually or predates your orchestrator setup, Read more

By Julien Laurenceau, 6 months2026-02-05 ago
apache spark

Apache Spark smoke tests on kubernetes

Introduction Benchmarking remains a critical (and often underestimated) tool when designing or validating large-scale data platforms. While many teams rely on synthetic workloads or production replays, standardized benchmarks still play a key role when comparing architectures, tuning clusters, or validating infrastructure choices. TPCx-HS is one of those benchmarks: designed to Read more

By Julien Laurenceau, 7 months2026-01-12 ago
data

Thanos TSDB: How Default Configurations Can Lead to Silent Data Loss

Thanos is a widely adopted open-source project that extends Prometheus’ capabilities, offering long-term storage, global querying, and downsampling. It’s a powerful tool for monitoring and observability, but like any complex system, it has its quirks. Thanos is cloud native and use s3 as its main storage backend. It can have Read more

By Julien Laurenceau, 8 months2025-12-06 ago
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