I may be missing the point but the contents of a file within a directory can change without affecting the directory.
> ls -ld . dog > drwxrwxrwt 24 root wheel 816 Jan 14 11:39 . > -rw-rw-r-- 1 pedzan wheel 0 Jan 14 11:41 dog > > echo more >> dog > > ls -ld . dog > drwxrwxrwt 24 root wheel 816 Jan 14 11:39 . > -rw-rw-r-- 1 pedzan wheel 5 Jan 14 12:39 dog dog changed. Its timestamp changed. But the containing directory's timestamp did not. This is on a Mac but I think this is generally true. If you add or delete a file, the directory's modified time changes but not if the files within it change. On Jan 14, 2014, at 11:22 AM, samba-b...@samba.org wrote: > https://bugzilla.samba.org/show_bug.cgi?id=10380 > > Summary: Non-Nested Folder Optimisation > Product: rsync > Version: 3.1.0 > Platform: All > OS/Version: All > Status: NEW > Severity: enhancement > Priority: P5 > Component: core > AssignedTo: way...@samba.org > ReportedBy: m...@haravikk.com > QAContact: rsync...@samba.org > > > One handy feature of most (all?) unix file systems is that if the contents of > a > folder are changed, then the folder's modified time will be updated as well, > which presents an opportunity for optimised comparisons. > > Quite simply, if a folder's modified time is the same as the corresponding > folder in the destination, then no comparison of its contents needs to be > performed. > At least, that is true if the folder doesn't contain any nested folders, as > modifications to these do not affect the parent folder's modified time. > > What I would like to propose is that when rsync begins generating a file list > for a destination directory, that it should attempt to mark any directories > that do no contain nested directories. When it comes time to compare such a > directory, the comparison can be done using only the modified times (if rsync > is operating in that mode), and only needs to compare file lists if these > times > differ. Provided rsync is able to generate enough of the destination file-list > in advance, then this should allow many unchanged folders to be skipped in > their entirety, without having to delve further into their contents. > > This feature could be enhanced by the use of a metadata file (see bug 10379) > by > storing a flag in a destination folder if it contains no nested directories. > This way, so long as the metadata file is valid, there is no need to process > the directory's file-list before an optimised comparison is performed. > > -- > Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are the QA contact for the bug. > -- > 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
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-- 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
