I am performing routine local storage synchronization for our digital marketing asset library. What is the easiest command to download all files from an S3 bucket to my local machine at maximum speed? The data needs to match the cloud state perfectly before we go offline.
3 answers
The absolute fastest way to mirror an entire bucket state perfectly is by using the sync command with the delete flag enabled. Running aws s3 sync s3://marketing-assets ./local-folder --delete ensures that your local directory becomes an exact mirror of the bucket. It downloads all files, creates missing directories, and crucially, removes any local files that no longer exist in the cloud bucket. This gives you a flawless, identical workspace copy instantly before disconnecting from production servers.
If I use the delete flag, won't that risk erasing unique untracked local documents that were placed in that directory manually? How do I safeguard local data while mirroring cloud updates?
You can also integrate the --exact-timestamps modifier if you are syncing between identical file systems to improve comparison metrics.
Excellent addition, Sandra. Fine-tuning timing parameters ensures that the file comparison phase completes much faster, providing a massive speed boost when maintaining massive corporate multimedia archives.
Raymond, to protect your custom local additions, simply omit the --delete flag. Without it, the command acts as a safe append-only update, downloading all new and modified files from the cloud bucket while leaving your manually created local documents completely untouched.