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Re: Deltarpm xz problem with PPC generated rpms?



On Mon, 2009-09-14 at 09:25 -0400, Ben Boeckel wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Dave Airlie wrote:
<snip>
> > [airlied pegasus ~]$ md5sum lm93_busted.o 
> > d7174fc439c4678927725d06de4f18a2  lm93_busted.o
> > [airlied pegasus ~]$ xz -z -c lm93_busted.o | md5sum
> > 86dbb83fea5f4e2f77396b3f491a0cc1  -
> > 
> > [airlied ppcg5 ~]$ md5sum lm93_busted.o
> > d7174fc439c4678927725d06de4f18a2  lm93_busted.o
> > [airlied ppcg5 ~]$ xz -z -c lm93_busted.o | md5sum
> > acf84a6c173b040f6cf8ea96c7daa513  -
> > 
> > 
> > thats just a random file I had on my machine here,
> > first is x86 32-bit, second is ppc.
> > xz-4.999.9-0.1.beta.fc12 on both.
> > 
> > Dave.
> 
> When I was playing around with xz after it came out, it detects 
> the processor and memory available to it and defaults to a 
> different compression quality based on that. Maybe if the 
> compression quality and memory usage is set in the command line, 
> you'd get the same output.
> 
> boeckb bronto-burt % md5sum eeepc.pdf
> efbb35dcb6903fa4a8be91a717ae5c97  eeepc.pdf
> boeckb bronto-burt % xz -c -f eeepc.pdf | md5sum
> b7d67d9b8b6a3ac00d9fcfab67ebd93b  -
> boeckb bronto-burt % xz -c -f -5 eeepc.pdf | md5sum
> 56a269074d015f6d46051a5ecf8d32da  -
> 
> [data cledwyn ~]$ xz -c -f eeepc.pdf | md5sum
> 5120f453bf577d58e3e94786e7bc5df1  -
> [data cledwyn ~]$ xz -c -f -5 eeepc.pdf | md5sum
> 56a269074d015f6d46051a5ecf8d32da  -
> 
> bronto-burt 3.0GHz x86_64 4GB   RAM
> cledwyn     667MHz i686   192MB RAM
> 
> xz-4.999.8-0.8.beta.20090817git.fc11 for both
> 
> - --Ben

Dave, if you're still around, do you mind running a check on both your
machines using "xz -c -z -7"?  IIRC, we do force the compression level
in both rpm and deltarpm to be 7.

Thanks,

Jonathan

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