I tried sync'ing between 2 s3 buckets using
s3cmd --no-preserve --guess-mime-type --acl-public --add-header="Cache-Control:max-age=2592000" sync s3://bucket-dev/js s3://bucket-www
In the destination bucket, i don't see Cache-Control in the metadata section.
Is this feature not supported or am i missing something ? Please advise.