Mailinglist Archive: opensuse-factory (808 mails)

[Stefan Seyfried <stefan.seyfried@xxxxxxxxxxxxxx>]

Am Tue, 30 Aug 2011 12:29:46 +0200
schrieb Ruediger Meier <sweet_f_a@xxxxxx>:

> On Tuesday 30 August 2011, Stefan Seyfried wrote:
> > I'm pretty sure that compression with different versions of old gzip
> > will yield different files.
>
> If you are sure then it should be easy to give an example ...
>
>
> Even I've tested all version from 1.2.4 (1993) until 1.4 (2010) on 
> different architectures.
> All deterministic.

11.4 x86_64:
seife@server:~/tmp> md5sum urandom
77b8857e80e450231c555122ccc4f789  urandom
seife@server:~/tmp> gzip -c urandom|md5sum
27713792de0f0821bf7dfa5c668d70c2  -

ARM embedded:
/tmp # md5sum urandom 
77b8857e80e450231c555122ccc4f789  urandom
/tmp # gzip -c urandom | md5sum
2f96e249b14ec2908d04b3bd8e532203  -

> AFAIK gzip's determinism is the the only reason why it was possible to 
> implement --rsyncable.

No, not at all.
-- 
Stefan Seyfried

"Dispatch war rocket Ajax to bring back his body!"
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