Wayne my vote is for a command-line option. Ive noticed there is some penalty for very large files (35GB-50GB). The penalty is relatively small based on my intuitive measurements read me watching without running a real timer. The difference is very small compared to what happens after a few weeks without the fragmentation patch. Our SAN was becoming so fragmented that we were only getting 10% of normal throughput. Since weve applied this patch our SAN is continuously getting maximum throughput. Benchmarks are numbers such as 10MB/sec throughput due to fragmentation versus 90MB-150MB without fragmentation (numbers reported by telnet sessions to the SAN device).
Fragmentation decreases are very significant. We see most files now created without any fragmentation (single fragment reported by sysinternals contig utility) whereas prior to the patch the same files were containing 40,000 fragments and above. In some cases we are still getting fragmented files but those files normally contain less than 2000 fragments and are only on files 10GB and above. Just my two cents -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
