data
Binance, Kerviel and NotPetya: Recovery Beyond the Bad Actor
Disaster recovery must survive compromised credentials and unavailable approvers. Binance, the Kerviel affair and Maersk’s NotPetya recovery expose the controls worth testing.
apache spark
Spark Output Committers on S3, MinIO and Ceph: Stop Committing by Rename
S3A committers avoid copying Spark output during commit, but they do not publish a dataset atomically. This guide shows how to configure and verify them in upstream Spark, what changes on Amazon EMR, and how to protect readers and concurrent writers.
data
Beyond Parquet and Avro: Choosing a Data File Format by Access Pattern
Lance, Vortex, Nimble, FastLanes, GeoParquet, cloud-optimized geo formats and new time-series encodings each optimize one access pattern on one storage tier. A field guide to what their published numbers measure, where tuned Parquet still wins, and how to choose.
db
Time-Series and Specialized Data Stores: Choosing the Right Engine
A field guide to choosing data stores: data shape, access pattern and consistency pick the class, operational defaults decide whether it stays safe. Two failure stories from the field.
data
Choosing an Event Mechanism for a Data Platform
Choose event delivery by semantics, not product names. Compare SSE, PostgreSQL, RabbitMQ, Kafka, Pulsar and AutoMQ by durability, replay and failure behavior.
data
Performance and Cost Engineering for Data Platforms
A field guide to performance and cost engineering: claim-checking with the scaling and queueing laws, measurement discipline, where GPU and CPU budgets leak, and how to turn a benchmark into a hardware decision.
AI
AI Infrastructure and SRE: Running Models in Production
A field guide to running AI in production: the supply chain as a dependency, quiet failure as the default mode, the verification gate as the method, and cost per correctly solved task as the metric.
ceph
Ceph in Production: RBD, RGW and CephFS
A field guide to Ceph in production: which surface serves which workload, what failure domains cost in replicas, how the upgrade lifecycle really rolls back, and what key rotation does not do.
ceph
Ceph RGW Accounts in Tentacle: Plan the Identity Model
Ceph tenants and accounts solve different problems. Separate the Tentacle upgrade from account adoption, then test ownership, IAM and notifications.
data
Data Platform Resilience: RTO, RPO and Replication in Practice
A DR document states minutes and megabytes. Replication architecture delivers a convergence time, a single-copy window and a failed tail. This guide maps what actually decides your RTO and RPO.