Tasks in Workers of Trino

[ndtrung7114]

I have a question:
In Trino, we can have more than 1 task per worker (I have two workers). If im using MySQL and JDBC only create 1 split for 1 table, then Trino send 1 upstream to next stage. Next stage is where it execute [HASH] tasks, so when it receive 1 upstream from previous stage, it assign 1 task per worker. So rule here is with [HASH] task, 1 task per worker or because it receive only 1 upstream from previous stage so it assign 1 task per worker