Yuvraj Singh

Yuvraj Singh

LLM · RL · Distributed Systems

Blog posts

2026

smoltorrent: Distributing ML Checkpoints Across a Pi Cluster

30 minute read

A 942 MB checkpoint. Four Raspberry Pis. ~1.5 min gather. No single point of failure. A deep dive into smoltorrent - a distributed checkpoint sharding system built over raw TCP with replication, SHA-256 integrity verification, mDNS discovery, and Prometheus monitoring. Read more

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Clustering 4 Raspberry Pis 4B

20 minute read

Build a 4-node Raspberry Pi 4B cluster with UCTRONICS enclosure, PoE+ hats, and TP-Link LS110P PoE switch. Real numbers: 94.4 Mbps per link (100 Mbps switch ceiling), 62.3°C under full 16-core load, zero throttling at 1800 MHz throughout. Read more

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Mac Minis Thunderbolt Cluster Setup Guide

11 minute read

Wire Mac minis into a high-bandwidth local Thunderbolt cluster for distributed training and inference with zero cloud egress cost, low latency, and direct control over cluster networking. Read more

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