How to write 5000 records into DynamoDB Table

Question

I have a use case where I have to write 5000 records into the dynamo DB table in one shot. I am using the batch save API of DynamoDBMapper Library. it can write up to 25 records in one go. can I pass the list of 5000 records to it and it will internally convert them into a batch of 25 records and write to the dynamodb table or I will have to handle this thing in my code using conditional some logic and will pass only 25 records to batch save?

Answer 1

 Here are the methods I use in order to achieve this end. I manage to do it, by first chucking the dataArray into small arrays:

const queryChunk = (arr, size) => { const tempArr = [] for (let i = 0, len = arr.length; i < len; i += size) { tempArr.push(arr.slice(i, i + size)); } return tempArr } const batchWriteManyItems = async (tableName, itemObjs, chunkSize = 25) => { return await Promise.all(queryChunk(itemObjs, chunkSize).map(async chunk => { await dynamoDB.batchWriteItem({RequestItems: {[tableName]: chunk}}).promise() })) }