OK - I was trying to create a 'smoother use' of the disk and 'read ahead' -- this example the disk would be chattering from the heads moving all over the place. I was trying to find a way to make this process more 'orderly' -- is there one?
-----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Robert Houben Sent: Monday, October 01, 2012 4:48 PM To: U2 Users List Subject: Re: [U2] [u2] Parallel processing in Universe Create an index on a dict pointing at the first character of the key, and have each phantom take two digits. (0-1, 2-3, 4-5, 6-7, 8-9) -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of David Wolverton Sent: October-01-12 2:43 PM To: 'U2 Users List' Subject: Re: [U2] [u2] Parallel processing in Universe So how would a user 'chop up' a file for parallel processing? Ideally, if here was a Mod 10001 file (or whatever) it would seem like it would be 'ideal' to assign 2000 groups to 5 phantoms -- but I don't know how 'start a BASIC select at Group 2001 or 4001' ... -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of George Gallen Sent: Monday, October 01, 2012 3:29 PM To: U2 Users List Subject: Re: [U2] [u2] Parallel processing in Universe 0001: OPENSEQ "/tmp/pipetest" TO F.PIPE ELSE STOP "NO PIPE" 0002: LOOP 0003: READSEQ LINE FROM F.PIPE ELSE CONTINUE 0004: PRINT LINE 0005: REPEAT 0006: STOP 0007: END Although, not sure if you might need to sleep a litte between the READSEQ's ELSE and CONTINUE Might suck up cpu time when nothing is writing to the file. Then you could setup a printer in UV that did a "cat - >> /tmp/pipetest" Now your phantom just needs to print to that printer. George -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of George Gallen Sent: Monday, October 01, 2012 4:16 PM To: U2 Users List Subject: Re: [U2] [u2] Parallel processing in Universe The only thing about a pipe is that once it's closed, I believe it has to be re-opened by both Ends again. So if point a opens one end, and point b opens the other end, once either end closes, It closes for both sides, and both sides would have to reopen again to use. To eliminate this, you could have one end open a file, and have the other sides do a ">>" append To that file - just make sure you include some kind of dataheader so the reading side knows which Process just wrote the data. -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of u2ug Sent: Monday, October 01, 2012 4:11 PM To: U2 Users List Subject: Re: [U2] [u2] Parallel processing in Universe pipes -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Wjhonson Sent: Monday, October 01, 2012 4:05 PM To: u2-users@listserver.u2ug.org Subject: [U2] [u2] Parallel processing in Universe What's the largest dataset in the Universe user world? In terms of number of records. I'm wondering if we have any potential for utilities that map-reduce. I suppose you would spawn phantoms but how do they communicate back to the master node? _______________________________________________ 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 _______________________________________________ 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
