Write-ups from real engineering work: performance, databases, infrastructure and developer tooling. Numbers come from measurements; anything measured once is marked as approximate.
| Date | Post | Topics |
|---|---|---|
| Nov 2026 | From a 45-minute scan to 42 seconds: a columnar copy beside an OLTP database | CockroachDB, Parquet, DataFusion, column families, malloc arenas |
| Nov 2026 | DuckDB vs DataFusion on 10 million wide rows: a tie, until you go cold | DuckDB, DataFusion, Parquet, cold starts, row-group size |
- devloop-supervisor: keeps build watches and dev servers alive, with an MCP endpoint for coding agents (npm)
- kerberos-linux-mssql: debugging Kerberos authentication from Linux to SQL Server, layer by layer
© 2026 Ganesh Krishnan. All rights reserved for the text; code snippets may be used freely.