Ehsan Hajyasini's Learning Journal

Introduction

I am Ehsan Hajyasini a PhD researcher @ UCSD - NVSL.

Software Quality

How do you improve software quality? Here is the answer we came to at Radin Bourse.

software quality TDD trunk-based pair-programming

Fast java Serialization and Networking

Serialization can be a big deal in Java (or any other language for that matter). Some libraries can take 10s of microseconds while others can be as fast as 20 nanoseconds.
Simple Binary Encoding (SBE) is used together with Aeron and is crazy fast.
Fast Binary Encoding (FBE)

Other than Aeron, KryoNet is a Java library that provides a clean and simple API for efficient TCP and UDP client/server network communication using NIO. KryoNet uses the Kryo serialization library.

latency networking serialization

How to Quantify Scalability

The Universal Scalability Law (USL)

scalability

Tail Latency @ Google

Google: Taming The Long Latency Tail - When More Machines Equals Worse Results

latency software

Aeron Message Passing Library

Aeron “promises to move millions of messages a second, at small microsecond latencies between machines, with consistent response times, to large numbers of clients”. A detailed overview could be found here which includes a very nice writeup of the lessons learned.

Aeron is commonly used in the trading industry.\

Talks: Aeron on InfoQ Aeron Clusters on InfoQ

Guides: Amaethon: Auctioning with Aeron and SBE!
Aeron For The Working Programmer
Aeron Stats Prometheus Exporter
Aeron Practice