Rajeshwar Vanka
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Writing

Articles and posts

Writing on databases, distributed systems, and building things on weekends. RSS

Series

Building Districted

Building a SimCity-lineage city simulation in Rust and WebAssembly with an AI pair — what was designed, what was argued, what broke, and what held.

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Part 1·September 26, 2026·9 min

Districted: Ground floor

Building a city simulation: specified below ground, seen above it

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Cloud Spanner

Cloud Spanner • Transactions

Spanner: Removing cumulative mutation limits for DML transactions

How Spanner removed the 80,000-mutation transaction-level limit for DML, so applications can run multiple DML statements in one transaction without artificial splits.

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Cloud Spanner • Cassandra API

Introducing Cassandra-compatible API in Cloud Spanner

Announcing the Cassandra-compatible API for Cloud Spanner, enabling applications built for Cassandra to run on Spanner's globally distributed architecture.

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Cloud Spanner • Performance

Cloud Spanner doubles the number of updates per transaction

An engineering deep dive into improvements that doubled the number of updates allowed per transaction in Cloud Spanner.

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