Parallelisation

Parallelisation

ZIO-DynamoDB also supports zipping queries that are not batchable according to AWS's docs. Instead of building a single batch request for these zipped queries we instead batch what we can and execute multiple requests in parallel.

val putItem = put[Student]("tableName", student)
val getItem = get[Student]("tableName", otherStudent)

for {
  result <- (putItem zip getItem).execute
} yield result

In the example above the putItem and getItem requests are executed in parallel as there is no AWS API for batching a PutItemRequest and a GetItemRequest together.

All DynamoDB Queries are eligible for parallel execution, however there are situations where the AWS API will error. For instance running a TransactWriteItems request on the same item an UpdateItem makes a change to will result in a runtime error.