Your application is using Kinesis to ingest click-stream data relating to your products from a variety of social media sites. Your company has been trending this quarter because a high profile movie star has recently signed a contract to endorse your products. As a result, the amount of data flowing through Kinesis has increased, causing you to increase the number of shards in your stream from 4 to 6. The application consuming the data runs on a single EC2 instance in us-east-1a with a second instance in us-east-1b which is used as a cold standby in case the primary instance fails. How many consumer instances will you now need in total to cope with the increased number of shards