I'm using rsync to update my local database snapshot from a remote pooled mirror server. The trouble is that the servers in the pool are sometimes out of date, so I only want to update when the files are newer than the local copies to avoid unnecessary I/O..
Originally I copied my existing database to a new directory, and updated that: cp -r <current> <new> rsync --update, <mirror> <new> mv <new> <current> That worked fine, but then I noticed --inplace, and realized my copy to the new directory should be redundant. So I tried: rsync --compare-dest=<current> --mkpath --update <mirror> <new> [ -e <new/stuff> ] && mv <new> <current> Which appeared to work, except it sometimes get backdated! My current hack is to change the second line to [ <new/stuff> -nt <current/stuff> ] && mv <new> <current> but it's already wasted downloading the old stuff. Exact reading of the docs says that --update compares source and target dates, so I guess it looks in the empty <new> rather than <current>. I can see it's justified, but unexpected. (For the curious, the snapshot is a Gentoo portage tree, about 75 MB in a single file, so it's worth trying to avoid unnecessary IO.)
-- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
