On Mon, Feb 05, 2007 at 05:06:31PM -0800, Matt wrote: > Anyway, I am wondering why it is taking full 12 minutes to complete the > rsync.
There are several things to check. Try timing an rsync run with -n to see how quickly it runs without doing any data transfer. Try doing an rsync of the destination dir (with -n --protocol=29) to some other local dir just to see how many seconds it takes to scan through all the files on the receiving side. Try using --del instead of --delete to ensure that you're not doing a separate delete pass. Do keep in mind that performance turning of protocol 30 hasn't been done yet. The largest potential for gain is when scanning huge numbers of files, as it should help to have both the sender and the receiver (generator, actually) scanning through the hierarchy at the same time rather than separately. It should also help that it scans and transfers a directory more closely together, so that it is more likely that the directory information is in the cache on the sending side. Beyond that, there might be a win due to less memory swapping (for really, really large transfers). If there are a large number of files to transfer, the win won't really be that much, as the generator will be waiting around for new file-list info a lot, and that data channel will be clogged up with file data. Thus, it might degrade back to waiting for the sender to finish the file list, but since the vast portion of such a transfer will be limited by the throughput of the data arriving from the sender, it is hard to imagine a way to improve that further (since the generator would be waiting a lot anyway for the sender to receive its data). ..wayne.. -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
