Dynamodb put_item qps

Question

dynamodb会限制put_item操作的qps吗？

我尝试使用aiobotocore将一些记录从json文件迁移到dynamodb，这是boto3的异步包装。

通过使用方法put_item，很难达到吞吐量。

将put_item中的方法更改为batch_write_item之后，很容易达到写入容量。

# Codes like this
import aiobotocore
import asyncio

resources = iter([])     
throughput = 1000
loop = asyncio.get_event_loop()
dydb = aiobotocore.get_session().create_client('dynamodb')


async def put_item(cli, item, table_name):
    await cli.put_item(TableName=table_name, Item=item)


async def batch_write_item(cli, items):
    await cli.batch_write_item(RequestItems=items)


async def test_put_item(resource, table_name):
    for item in resource:
        await put_item(dydb, item, table_name)


async def test_batch_write_item(resource):
    batch = []
    for item in resource:
        if len(batch) > 24:
            await batch_write_item(dydb, batch)
            batch = []
        else:
            batch.append(item)


if __name__ == "__main__":
    # put item
    tasks = [test_put_item(resource) for _ in range(throughput)]
    loop.run_until_complete(asyncio.gather(*tasks))

    # batch write
    # tasks = [test_batch_write_item(resource) for _ in range(throughput // 25)]
    # loop.run_until_complete(*tasks)