Author: Dann Corbit
Date: 10:53:32 02/19/01
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On February 17, 2001 at 20:08:50, ujecrh wrote: >On February 16, 2001 at 20:00:50, Dann Corbit wrote: > >>Games from 1500 to 1950 are found here in PGN and SCID format. The games are >>compressed with bzip2 (and the binary to compress/decompress is found in the >>same location): >> >>Compressed PGN: >>ftp://cap.connx.com/pub/Scid/hist.pgn.bz2 >> >>Compressed SCID: >>ftp://cap.connx.com/pub/Scid/hist.sg.bz2 >>ftp://cap.connx.com/pub/Scid/hist.si.bz2 >>ftp://cap.connx.com/pub/Scid/hist.sn.bz2 >> >>Compression/Decompression program: >>ftp://cap.connx.com/pub/Scid/bzip2.exe >> >>To decompress a file, do it like this: >> >>bzip2 -d hist.pgn.bz2 >> >>When the program bzip2 finishes, the file hist.pgn will be expanded in place and >>the file hist.pgn.bz2 will be gone. > >Is there any reason not compressing it with gzip instead so that the file is >immediately readable by SCID with uncompression ? (the difference in size should >not be so big or can SCID beta use bzip2 compressed PGNs ?) Yes. During any given moment, about 80 people will be attached to my ftp site on average. Almost all of them (better than 90%) will be connected at 2K/sec. Occasionally, I will see 4K,6K, or 10K connections. More often 15K, 30K, 50K or 75K for the rest. In other words, it is either feast or famine. For those with fast connections, it does not matter what sort of compression I use. For those with the very slow connections, it matters a great deal -- especially if they have to pay for phone time. The compression achieved by bzip2 is quite a bit better than anything else. Once you have downloaded it, it will only take a couple minutes to change the format to gzip if that is your desire.
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