You're welcome. I need this as we store all attached files of e-mails in our DMS and here we find truckloads of duplicates (logos in mail signatures, etc.) In order to avoid blowing up storage we calculate a hash of every file and only store uniques, and then link them to the appropriate source documents. Of course, when we switched to this system we had to cleanup all the existing storage, hence we did somethings similar. Using the hash has proven to be the best and most secure approach as ist is guaranteed to identify identical files no matter what they are named, it even finds them if someone mistakenly uses a different suffix (i.e. jpeg instead of jpg).
Cheers Alex > Am 14.03.2017 um 10:11 schrieb Robert ListMail via 4D_Tech > <4d_tech@lists.4d.com>: > > Alex, thanks for the input. I thought it might be a good task for 4D. So how > or why do you need such a tool? > > Btw: I don't really need the hash comparison if I had other file attributes. > I'll look at this again tomorrow. > > Thanks, > > Robert > > Sent from my iPhone > >> On Mar 14, 2017, at 3:25 AM, Herr Alexander Heintz via 4D_Tech >> <4d_tech@lists.4d.com> wrote: >> >> >> I use a similar Algorithm for optimizing document storage. >> Pretty simple actually: >> just troll through all directories recursively and store each file in a >> record. > > ********************************************************************** > 4D Internet Users Group (4D iNUG) > FAQ: http://lists.4d.com/faqnug.html > Archive: http://lists.4d.com/archives.html > Options: http://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:4d_tech-unsubscr...@lists.4d.com > ********************************************************************** ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************
