Imports github.com/aws/aws-sdk-go/aws/session github.com/youtube/vitess/go/vt/concurrency github.com/aws/aws-sdk-go/service/s3/s3manager github.com/youtube/vitess/go/vt/mysqlctl/backupstorage github.com/aws/aws-sdk-go/service/s3 Standard library imports flag fmt io sort strings sync