Presto is an open source distributed parallel query SQL engine that runs on a cluster of nodes. In this tutorial we will show you how to run Presto with AWS Glue as a catalog on a laptop.
We did mention in the tutorial Presto 104 why we are using a catalog. Just to recap, Presto is a disaggregated database engine. This means that Presto has the top part of the database stack – the SQL parser, compiler, optimizer, scheduler, execution engine – but it does not have other components of the database – this includes the system catalog. In the data lake world, the system catalog where the database schema resides is a catalog. There are two popular catalogs that have emerged – Hive Metastore and AWS Glue catalog.
What is AWS Glue?
AWS Glue is an event-driven, serverless computing platform provided by AWS. AWS Glue provides data integration service that makes it easy to discover, prepare, and combine data for analytics, machine learning, and application development. The AWS Glue catalog does the mapping between the database tables and columns and the objects or files that reside in the data lake. This could be files or immutable objects in AWS S3.
In this tutorial, we will focus on using Presto with the AWS Glue on your laptop.
This document simplifies the process for a laptop scenario to get you started. For real production workloads, you can try out Ahana Cloud which is a managed service for Presto on AWS and comes pre-integrated with an AWS Glue catalog.
Create a docker network namespace, so that containers could communicate with each other using the network namespace.
Edit the etc/config.properties file in each of the three worker containers and set coordinator to false, http-server.http.port to 8081/8082/8083 respectively for each worker and finally discovery.uri should point to coordinator.
Run aws configure and enter the access and secret key configured.
aws configure AWS Access Key ID [None]: XXXXXXXXXXXXXAWS Secret Access Key [None]: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Default region name [None]: Default output format [None]
Create /opt/presto-server/etc/catalog/glue.properties file add the AWS Glue properties to presto, this file needs to be added on both coordinator and worker containers. Add the AWS access and secret keys generated in the previous step to hive.metastore.glue.aws-access-key and hive.metastore.glue.aws-secret-key.
In this tutorial, we provide steps to use Presto with AWS Glue as a catalog on a laptop. If you’re looking to get started easily with Presto and a pre-configured Glue catalog, check out Ahana Cloud, a managed service for Presto on AWS that provides both Hive Metastore and AWS Glue as a choice of catalog for prestodb.