[adpowers]

Sadly no mention of multipart upload. If you use S3's multipart upload feature you can get similar performance for one file by uploading multiple parts of the file at once. I saw a substantial throughput improvement when I implemented some multipart upload code, even when uploading from EC2.

[orcadk]

Totally true. However, I had to limit the scope of this post somewhere, and in this case, I focused on multithreaded upload of smaller objects, as mentioned in the first paragraph. We do have some larger object uploads, though they are a minority. I may do a separate followup post on high performance single file uploads through multipart uploading.