attempt to read / write from / to Amazon S3 multiple times because otherwise it crashes after some time with:

2013-07-01 10:52:55,603 [26516]: RequestTimeout: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.
2013-07-01 10:52:55,613 [26262]: Job error: RequestTimeout: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed. at <...>/Storage/Handler/AmazonS3.pm line 176
Job error: RequestTimeout: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed. at <...>/Storage/Handler/AmazonS3.pm line 176