Presto is an open source distributed SQL query engine for running interactive analytic queries against data sources of all sizes ranging from gigabytes to petabytes. Presto was designed and written from the ground up for interactive analysis and approaches the speed of commercial data warehouses.
Presto allows querying data where it lives, including Hive, Cassandra, relational databases or even proprietary data stores. A single Presto query can combine data from multiple sources, allowing for analysis across your entire organization.
EMR integrates the native web UI of Presto, which you can see in the EMR Console. Log in to the EMR Console, click a cluster instance ID to enter the instance management page. Click Cluster Service on the left sidebar to view the entry to the WebUI Address page and then click the entry to Presto. The username for login is
root, and the password is the one set when the cluster was created as shown below:
It is required to authenticate the accesses. The username is root, and the default password is the one entered when the cluster was created. To change the password, click Reset Native UI Password.