From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Reiser Subject: Re: Can ReiserFS solve this? Date: Mon, 28 Apr 2003 18:53:34 +0400 Message-ID: <3EAD406E.5040108@namesys.com> References: <3EAD34D5.8030108@solidcode.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <3EAD34D5.8030108@solidcode.net> List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Erik Terpstra Cc: reiserfs-list@namesys.com Erik Terpstra wrote: > Hi, > > I am looking for a solution for the following problem: > > On a legacy system for newspaper workflow, files are delivered to a > certain directory (for example ~/input). > These files (in TIFF format) can be quite large (10 to 400 MB), they > could be copied over the local filesystem, a Samba share or via FTP. > When large files are copied over the network these files show up in > ~/input while they are being copied (you can see the filesize grow). > > However TIFF files are only useful for further processing when they > are complete. > > Initially we solved this problem by monitoring the input directory and > make our applications look at the files until they stop growing, but > this isn't a very elegant and reliable method. > > After a while we discovered the UNIX 'fuser' command so that we could > see if the incoming file is still being transferred or not. > This works fine but it's still not very elegant, and it requires root > privileges for the applications involved in the workflow. > > Naturally, the best solution would be for the sender to notify the > completion of the transfer. But this is not an option because several > organizations are involved that do not wish to adapt their software. > > Right now I am wondering if this is something that could be solved on > the filesystem level, i.e. is it possible to 'only see files that are > not in the process of being transferred'. > > Is this possible with Reiser3? Reiser4? Should it be solved on the > filesystem level? > > Any thoughts on this matter are appreciated. > > Kind regards, > > Erik Terpstra. > > > Is there a test for completeness of the tiff? It could be done as a reiser4 plugin. -- Hans