Ben Chuanlong Du's Blog

It is never too late to learn.

Useful Rust Crates for Database

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Neon

Neon is a serverless open-source alternative to AWS Aurora Postgres. It separates storage and compute and substitutes the PostgreSQL storage layer by redistributing data across a cluster of nodes.

sqlx …

Improve the Performance of Spark

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Plan Your Work

  1. Have a clear idea about what you want to do is very important, especially when you are working on an explorative project. It often saves you time to …

Spark Issue: UriSyntaxException

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Symptoms

java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: hdfs::/cluster-name/user/dclong/feature_example/features/train/2022-03-11

Possible Causes

As the error message points out, there's a syntax …

Spark Issue: SIGBUS

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Symptoms

CalledProcessError: Command './pine' died with .

Possible Causes

SIGBUS (bus error) is a signal that happens when you try to access memory that has not been physically mapped . There are several …