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Subject: Re: CCC Archives - 70MB instead of 200MB! - ZIP vs. CAB

Author: Daniel Clausen

Date: 06:13:02 06/13/02

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On June 13, 2002 at 08:52:02, Sally Weltrop wrote:

>On June 13, 2002 at 08:20:04, Gian-Carlo Pascutto wrote:
>
>>On June 13, 2002 at 06:49:22, Sally Weltrop wrote:
>>
>>>I converted all the CCC archives from 9/97 - 2/02 that were in ZIP format to CAB
>>>format. It was a substantial savings in size. I lopped off about 65%
>>>excessthrough better compression. The CAB format can easily be extracted with
>>>WinZIP and many of the other compression tools out. If ANYONE that hosts these
>>>files wants me to upload them to their site just let me know and I'll do it. It
>>>could save a lot of time for someone with dial-up connections to get a hold of
>>>the archives or for those trying to save space.
>>>
>>>CAB even did better in this instance than the latest versions of ACE & RAR
>>
>>I don't think CAB is supported outside Windows.
>>
>>Tar + bzip2 would be good universal solution that will be hard to beat.
>
>ZIP ----- 5.37MB
>CAB ----- 2.20MB
>BZip2 --- 3.21MB
>
>Now do u mean TAR them first THEN Bzip'em? or just BZip2 as a TAR format?
>
>I tried that and they came out the same 3.21MB
>
>I can do this if u want, convert them to BZip2 TAR format. it ends with a BZ2
>extension
>>
>>--
>>GCP

A TAR+bzip2 solution surely would be nice, so non-Windows people can extract
them too...

You should first tar everything in one file and afterwards bzip2/gzip the single
file. Unlike with Winzip, the process of archiving and compressing is separated
in 2 commands.

gzip/bzip/winzip are general-purpose compressors. They do quite good on average,
but specialized compressors (ie they know what kind of input they get) will
always be better.

Sargon



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