I subscribe to the jackrabbit mailing list and this response made me think.. Why?? Using a check sum to build a folder structure.?. Shouldn't the folder structure be understandable... If that is recommended... I really must have missed the purpose of jcr... ------Original Message------ From: Matt Meola To: [email protected] ReplyTo: [email protected] Subject: Re: novice question - photo gallery Sent: Apr 24, 2010 6:21 PM
Michael Yin wrote: > I believe that a fairly flat structure is not the most efficient for > jackrabbit. Maybe use dates (month/year) or some other grouping to further > build the tree? > > -mike > Indeed, just about all the advice out there is "go deep" instead of "go wide". One possible way to do that would be to calculate, say, and MD5 checksum from the file (its name, or its contents, whatever), and take the pairs of digits and make each of those pairs a folder. Example: an image named "blub", gives an md5 hash of 455523d86a8a1ab7c7d33208fe0219e7, which would yield a folder structure of data/pictures/gallery/45/55/23/d8/6a/8a/1a/b7/c7/d3/32/08/fe/02/19/e7/original data/pictures/gallery/45/55/23/d8/6a/8a/1a/b7/c7/d3/32/08/fe/02/19/e7/1024x768 data/pictures/gallery/45/55/23/d8/6a/8a/1a/b7/c7/d3/32/08/fe/02/19/e7/64x64 ... You could take them in groups of three, or four, or you could only go so far with it (not using the entire checksum) -- whatever you like. Regardless, you ought to be able to get a reasonably balanced tree over time. Just my two cents... -- Matt Meola Sent via BlackBerry by AT&T
