Dynamodb bulk import. That being said, once you need to import tenths, hundreds, or thousands of records, that's where you need a bulk import tool. Dec 6, 2025 · While DynamoDB doesn’t natively support "drag-and-drop" CSV imports, this tutorial will guide you through a reliable, step-by-step process to import bulk data using the AWS Command Line Interface (CLI) and a simple Python script. . DynamoDB import allows you to import data from an Amazon S3 bucket to a new DynamoDB table. When it comes to inserting a handful of records into DynamoDB, you can do so in a variety of different ways. To import data into DynamoDB, your data must be in an Amazon S3 bucket in CSV, DynamoDB JSON, or Amazon Ion format. They both require to load a json or csv to s3, but what if I want to use the existing AWS Backup or the DynamoDB JSON to re-populate this existing table? May 5, 2025 · I recently had to populate a DynamoDB table with over 740,000 items as part of a migration project. I just wrote a function in Node. Download the CloudFormation template from the GitHub repo to build and use this solution. Combined with the table export to S3 feature, you can now more easily move, transform, and copy your DynamoDB tables from one application, account, or AWS Region to another. Overview I recently needed to import a lot of JSON data into DynamoDB for an API project I Tagged with aws, json, database. Supported file formats are CSV, DynamoDB JSON, or Amazon ION. PD: I am new to AWS and I have looked at bulk upload data options provided by the knowledge center and an AWS blog for importing data via Lambda. For more information, see Importing data from Amazon S3 to DynamoDB. DynamoDB import from S3 helps you to bulk import terabytes of data from S3 into a new DynamoDB table with no code or servers required. Import Table feature If the data is stored in Amazon S3, then you can upload the data to a new DynamoDB table using the Import Table feature. I tried three different approaches to see what would give me the best mix of speed, cost, and operational sanity. Or when streaming data into a table, it can be useful to run a nightly batch "true-up" job to correct any intra-day anomalies that may have occurred. DynamoDB import from S3 helps you to bulk import terabytes of data from Amazon S3 into a new DynamoDB table with no code or servers required. A single call to BatchWriteItem can transmit up to 16MB of data over the network, consisting of up to 25 item put or delete operations. Amazon DynamoDB bulk import and export capabilities provide a simple and efficient way to move data between Amazon S3 and DynamoDB tables without writing any code. This feature supports CSV, DynamoDB JSON, or Amazon ION format in either compressed (GZIP or ZSTD) or uncompressed format. Nov 16, 2020 · The need for quick bulk imports can occur when records in a table get corrupted, and the easiest way to fix them is do a full table drop-and-recreate. Data can be compressed in ZSTD or GZIP format, or can be directly imported in uncompressed form. Mar 30, 2020 · The post also provided a streamlined, cost-effective solution for bulk ingestion of CSV data into DynamoDB that uses a Lambda function written in Python. Learn about best practices for using advanced design patterns when you need to perform bulk operations, implement robust version control mechanisms, or manage time-sensitive data. You can request a table import using the DynamoDB console, the CLI, CloudFormation or the DynamoDB API. aws dynamodb batch-write-item --request-ite The BatchWriteItem operation puts or deletes multiple items in one or more tables. It first parses the whole CSV into an array, splits array into (25) chunks and then batchWriteItem into table. DynamoDB Importer Overview DynamoDB importer allows you to import multiple rows from a file in the csv or json In this tutorial, you'll learn how to do a bulk insert into a DynamoDB table using BatchWriteItem AWS CLI command. js that can import a CSV file into a DynamoDB table. While individual items can be up to 400 KB once stored, it's important to note that an item's representation might be greater than 400KB while being sent in DynamoDB's JSON DynamoDB import from S3 helps you to bulk import terabytes of data from Amazon S3 into a new DynamoDB table with no code or servers required. mayji, 5yf8i, uphhkm, wei3, celo, dkpswi, vfq0jy, wir3, lrkw, euoc,