DynamoDB also supports writing items in a batch using the batch-write-item command action. 

batch-write-item has the following characteristics:

• Can write to one or more tables.
• Can write up to 25 items. If we try to write more than 25 items, the whole set will fail.

• Maximum request size is 16 MB.
• Any unprocessed items are returned.
• From a capacity unit calculation perspective, each item is treated separately. For example, if I have two items of 6 KB each, both items will take two units, making a total of four capacity units. See the throughput provisioning recipe for more clarity on throughput calculations. 
• The batch-write-item can be used for put or delete. You cannot do put and delete for the same item.