You are of course right - in my defence it was a few years ago ;)
-----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Baakkonen, Rodney A (Rod) 46K Sent: 26 April 2012 12:21 To: 'U2 Users List' Subject: Re: [U2] Huge Dynamic Unidata file I thought TMPPATH was not valid for Dynamic files: ?? The TMPPATH option is invalid if any DYNAMIC options are specified (or if the starting file is dynamic and no file type options are specified). -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Symeon Breen Sent: Thursday, April 26, 2012 6:18 AM To: 'U2 Users List' Subject: Re: [U2] Huge Dynamic Unidata file That's is pretty big, my personal experience with big files on udt was up to about 60Gig - we did use memresize no problems - but had to set the TMPPATH to another drive. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Baakkonen, Rodney A (Rod) 46K Sent: 26 April 2012 12:00 To: 'U2 Users List' Subject: Re: [U2] Huge Dynamic Unidata file Indexes and all, 91 G with about 75 million records. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Symeon Breen Sent: Thursday, April 26, 2012 4:08 AM To: 'U2 Users List' Subject: Re: [U2] Huge Dynamic Unidata file Out of interest, how big is this file and how many records ? -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Baakkonen, Rodney A (Rod) 46K Sent: 25 April 2012 21:30 To: 'U2 Users List'; jonathan.lec...@blairswindows.co.uk Subject: Re: [U2] Huge Dynamic Unidata file I think at the time I wrote this, Unidata 6 I think, I could not even get memresize to handle overflow that was larger than 2 gigabytes. So I thought the solution by Unidata was to create an overflow file for every dat segment. I have never specified the OVERFLOW option when using memresize. Plus, I rarely have enough space in a file system to handle 2 copies of one of my big file. One work around for the file system space issue is to symbolically link the original file in another file system. But that is a lot of work when you have a lot of dat files. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of dean.armbrus...@ferguson.com Sent: Wednesday, April 25, 2012 3:16 PM To: u2-users@listserver.u2ug.org; jonathan.lec...@blairswindows.co.uk Subject: Re: [U2] Huge Dynamic Unidata file Were you using the OVERFLOW option with memresize? If not, memresize should not be creating the extra over files. If memresize did create the extra over files without the OVERFLOW option, then that would be a bug in memresize. Dean Armbruster System Analyst 757-989-2839 -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Baakkonen, Rodney A (Rod) 46K Sent: Wednesday, April 25, 2012 12:29 To: 'Jonathan Leckie'; 'U2 Users List' Subject: Re: [U2] Huge Dynamic Unidata file I resize most of my Dynamic files this way. I don't like having a small overxxx segment for every datxxx segment that memresize creates.. By creating the new file my self, I don't have a lot of these small overxxx segments that are never used. I also wrote a process to Select the old file and create a SAVELIST. Without going into to much detail, the process uses PHANTOM to spawn off a number of Unidata copies. So there are a number of simultaneous processes working to build the new file. Each PHANTOM Copy knows how many total phantoms are working on the file and what sequence IT is within the total number of PHANTOMS. Each Phantom handles part of the SAVELIST. Each PHANTOM does the iteration below until the list is exhausted: 1. QSELECT SAVEDLISTS listname000. (process 2 would use 001, process 3 would use 002 etc) 2. COPY FROM old.file TO new.file 3. Increment the list counter from 000 by the number of Phantoms and go back to step one to process a new segment of the savelist. 4. If a process cannot find the next savelist segment in SAVEDLISTS, it is done. This process is almost as fast as memresize. You can control what file systems are used for space reasons and you don't get scads of overxxx segments in your FILE.NAME directory (one of my dynamic files has 39 dat segments and just a over001). So I don't use memresize for dynamic files anymore. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Jonathan Leckie Sent: Wednesday, April 25, 2012 9:36 AM To: u2-users@listserver.u2ug.org Subject: [U2] Huge Dynamic Unidata file I have a very large file that I don't have enough free space to memresize, however howabout I create new dynamic (temporary) file and then copy all the records (in ECL) to the new file and then (unix) copy the temporary file over the top of the original. Does that seem like a sensible idea? 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