For me, the key point is knowing how many records per day are going to be written to the log. If it's a reasonably small amount, better to write out to a text file with the log date as the key, makes for easy log reading. If it's a bit more than that I agree more or less with Phil below. I would create dynamic subfiles for each month for easy maintenance. The use minimum modulus is ok but I think we're making a big deal about something that might not even be a performance issue. Once again, the important missing data here is knowing how many records are to be written.
-----Mensaje original----- De: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] En nombre de Phil Walker Enviado el: martes, 09 de julio de 2013 15:51 Para: U2 Users List Asunto: Re: [U2] File type 30 (dynamic) I would probably use a distributed file, with a key based on some date elemen, e.g. month. That way you can add partfiles as a month happens and each file would be a static file of a standard size optimized for the number and size of records expected for that month. You can then have a rolling 12-month window without the disruption of having to add/delete records during the same timeframe as you would for purging a dynamic file. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Dan Fitzgerald Sent: Wednesday, 10 July 2013 6:01 a.m. To: U2 Users List Subject: Re: [U2] File type 30 (dynamic) Once you start splitting groups, there's overhead on every write where that occurs, possibly creating a bottleneck. Dynamic files are good for files with non-consistent item sizes, and also for files with oversized items, but that's not the case here. I'd go with a "wide & shallow" static file for this purpose, even if you had to make it distributed to account for size. Since most of what you'll do with this file is write to it, I wouldn't worry too much about empty groups. > Date: Tue, 9 Jul 2013 09:15:20 -0700 > From: szach...@gardensalive.com > To: u2-users@listserver.u2ug.org > Subject: [U2] File type 30 (dynamic) > > I have very little experience with using dynamic (type 30) files and > I'm looking for some pointers in that regard. I have a file that I am > considering creating as a dynamic file. The file will be a log file > with sequential numeric keys. The record size will normally range from > about 200 to 700 bytes, with a probable maximum size of less than > 1,000 bytes. We expect the file to continually grow without deletions > and we will likely purge it annually. What are the pro's and con's of > creating this file as type 30 verses other file types? > > Thanks, > > Scott Zachary > UniVerse Developer > Gardens Alive! Inc > > > > -- > View this message in context: > http://u2-universe-unidata.1073795.n5.nabble.com/File-type-30-dynamic- > tp41129.html Sent from the U2 - Users mailing list archive at > Nabble.com. > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
