This Week in Ballista #331 Jan 2021
Welcome to the third edition of “This Week in Ballista”, a weekly newsletter that summarizes activity in the Ballista Distributed Compute project.
Ballista is a modern distributed compute platform powered by Apache Arrow and primarily implemented in Rust, but designed to provide first-class support for other programming languages, including Python, C++, and Java.
There have been some notable developments this week:
There are now separate
executor binaries, with support for the following deployment models:
- Local Mode: Single process containing scheduler and executor. This is the simplest way to run Ballista and is primarily intended for local development testing.
- Standalone Mode: Executors connect to the scheduler process
- Etcd Mode: Executors connect to the scheduler process and the scheduler uses etcd for state management
@edrevo for taking the lead on this work.
Preliminary work on distributed query execution is now checked in, although not working yet. End-to-end testing is now at the point where fragments of the physical plan are being sent to executors for execution. This work will likely continue over the next 2-3 weekends and the hope is that distributed execution will be fully working again sometime in March 2021, with support for several of the TPC-H queries.
There is still a need to continue with implementing serde for the physical plan so that a wide range of queries can be supported in distributed mode once the distributed planner is complete.
- An interview with Andy Grove has been published, which talks about the motivation for the Ballista project.
Join the Community
There is a growing community in the Ballista Discord Channel. This is a great place to ask questions and learn more about the project.