Hey everyone! I'm completely new to AWS and I need to transfer about 40TB of data from an S3 bucket in one AWS account to another, and both accounts are in the same region. This is a one-time migration, so I want to find the most cost-effective and efficient method for doing this. I've heard a few options:
- Using `aws s3 sync` or `s3 cp` with cross-account permissions.
- S3 replication or batch operations.
- Setting up an EC2 instance to handle the copy.
- AWS DataSync or Snowball (but I'm unsure about the cost).
I have a few questions:
1. What's the most budget-friendly approach for this large amount of data?
2. Is transferring data within the same region free between accounts?
3. If I decide to go with EC2, what type of instance/storage should I use?
4. What's the simplest way to manage permissions between buckets across two different accounts?
Any advice or examples (CLI/bash) from anyone who has done this before would be greatly appreciated! Thanks!
5 Answers
I'd go for DataSync, as it seems to fit your needs perfectly! S3 Batch Operations could also work well. Using EC2 is kind of overkill for this size; it's more complex and may not be as cost-effective. Just make sure your permissions are set up correctly, or things might get tricky!
Transferring between buckets in the same region is actually free according to AWS! Just keep in mind that you may incur costs for requests, especially with object size playing a role. Also, AWS does allow free transfer out to other cloud providers, so if you're feeling adventurous, you could try transferring out to another service and then back into AWS since that part is free too. Just remember to involve support for that!
I have had success with batch replication for large S3 transfers! It’s robust, and now you don’t have to face the complex setup hurdles that might have existed a while back. Just a heads-up, using CLI for such large volumes can be tricky—it can lead to errors if connections drop or something fails. DataSync is simpler but tends to be pricier, plus it has speed limits unless you go with an agent, which isn’t ideal for S3 transfers. Just stay clear of using EC2 or CLI for such a big data move—it’s likely to cost you more effort and headaches!
I highly recommend using AWS DataSync. It's straightforward and works well for this kind of task. You could also consider the S3 Batch Operations—they're much faster and rugged for large transfers. Plus, remember that same-region transfers are free, which is a big win for your costs!
Just a thought—why not just create cross-account access with a bucket policy instead of transferring everything? It could save you a lot of hassle and cost, plus you won’t have to deal with the logistics of moving such a large amount of data.
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