If you are also using S3 to store your data, then in one case or another, you may have come across a scenario or may need in the future where you need to copy your files between two different AWS S3 buckets within the same account. S3 also provides access to manage data across websites, mobile applications, backup and restore big data analytics, and many other applications. It is a cost-effective storage service and designed for 99.999999999 percent durability. In S3, data is stored as objects within resources called buckets that offer storage space where a single object can take up to 5 terabytes in size. It was first introduced in 2006, and since then, Amazon S3 has emerged as a popular platform for object-based storage usage. Response = clientname.list_objects( Bucket=bucket, MaxKeys=5, Marker=os.AWS S3 stands for Simple Storage Service – one of the most commonly used AWS services.

so the next time the function executes s3 client will list objects starting from marker position. After a successful execution of the function, I change the 'marker' value to the key name of last s3 object listed. I initially create a environment variable named 'marker' and set its value to empty. I can use the 'Marker' parameter in list_object request to remember the last file that was listed. Now how can I make sure the function is copying new files each time it runs?

My function is: s3 = boto3.resource('s3')īucket = 'test-bucket-for-transfer-check'ĭestbucket = s3.Bucket('serverless-demo-s3-bucket')

I want to run a lambda function every 1 minute and copy those files to another destination s3 bucket. I have a existing s3 bucket which contains large amount of files. If you're posting a technical query, please include the following details, so that we can help you more efficiently:ĭoes this sidebar need an addition or correction? Tell us here

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Aws s3 copy only certain files