DynamoDB – MapReduce Amazon”s Elastic MapReduce (EMR) allows you to quickly and efficiently process big data. EMR runs Apache Hadoop on EC2 instances, but simplifies the process. You utilize Apache to query map reduce job flows through , a query language resembling SQL. Apache Hive serves as a way to optimize queries and your applications. […]
Category Archives: dynamodb
DynamoDB – Update Items Updating an item in DynamoDB mainly consists of specifying the full primary key and table name for the item. It requires a new value for each attribute you modify. The operation uses UpdateItem, which modifies the existing items or creates them on discovery of a missing item. In updates, you might […]
DynamoDB – Batch Writing Batch writing operates on multiple items by creating or deleting several items. These operations utilize BatchWriteItem, which carries the limitations of no more than 16MB writes and 25 requests. Each item obeys a 400KB size limit. Batch writes also cannot perform item updates. What is Batch Writing? Batch writes can manipulate […]