Author: Robert Hyatt
Date: 09:06:45 08/15/05
Go up one level in this thread
On August 15, 2005 at 11:33:55, Joshua Shriver wrote: >Interesting read. Thanks for the reply sir. > >By chance has there been any thought about setting up a BT site for the TB's? At >least for the 6men? not that I know of. making downloads easier would probably get us into more hot water with the UAB network folks. They continually point out that we are smoking 70+ megabits per second, 24 hours a day, 7 days a week, with the current ftp server. :) > > > >> >> >>There is a big problem. Suppose you want to read the byte displaced >>1,000,000,000 from the beginning. Serial compression requires serial >>decompression, reading and decompressing all the data before the byte you want, >>so you can recognize the byte you want. >> >>The EGTB compression uses "blocks" so that we can read in a single block from >>anywhere in the file, and just have to decompress that block, rather than all >>the preceeding data. You can make the blocksize bigger to improve the >>compression, but it costs you at decompression time, which is, unfortunately, >>right in the middle of your tree search. NPS goes into the toilet. >> >>When we started this stuff, I ran a _bunch_ of tests for Eugene to choose the >>best compression blocksize from a tree-search vs compression efficiency point of >>view...
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