design board using dynamoDB -

i want make board using dynamodb. post have board name , timestamp , info. want receive posts sorted timestamp in specific board name. think model, partition key board name, , range key timestamp. same partition key called. how can make model?

i recommend read guide:

http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/guidelinesfortables.html

for questions - depend on how many read/writes.. etc.. believe doc can answer scenario