On 9/16/07, Hugo Connery <[EMAIL PROTECTED]> wrote: > Yes, uid/access time based statistics gathering is quite orthogonal to > rsync's motivation. But, rsync, as it backs up my data, it has access > to all the statistics I need, so why not piggy back the stats gathering > on rsync as a matter of efficiency?
The efficiency loss doesn't seem to be much. On my computer, git can traverse my kernel source tree and stat all ~22000 files in about half a second, provided the stat info was in the kernel's cache. If you gather statistics right before running rsync, the statistics-gathering will probably take longer because it has to bring stat info into cache, but having done so will speed up rsync's stat calls by the same amount, so overall the loss is not much. > But, perhaps orthogonal extensions breaks one of the fundamental rules: > do one thing well. This rule is extremely important when deciding what functionality to include in the standard rsync, but if making your own copy of rsync with an orthogonal extension is the best way for you to accomplish a specific task, I would say go for it. I'm just not convinced it's the best way, because a separate program has the advantages that rsync can be upgraded without having to be re-patched, statistics-gathering can be run/scheduled independently of rsync, and the program can be written in Perl rather than C. I'm just giving my advice/opinion; you implement the statistics gathering however you like. Matt -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
