yum-presto behaviour on arm

Jonathan Dieter jdieter at gmail.com
Wed Dec 16 14:12:32 UTC 2009

On Wed, 2009-12-16 at 14:06 +0000, Andy Green wrote:
> Hi -
> Is yum-presto known to work on arm?  Today I changed our repo to use 
> deltarpms and tested it out.  I noticed...
> 1) On a package where I know the bulk of the unpacked data is some fonts 
> inside an ELF executable that didn't change, the compression result 
> was... not good
>    Old RPM:  25424385 txtr-reader-0.1-417.fc11.armv5tel.rpm
>    New RPM:  25465487 txtr-reader-0.1-420.fc11.armv5tel.rpm
> Delta RPM:  25465402 txtr-reader-0.1-417.fc11_0.1-420.fc11.armv5tel.drpm
> So it saved me 85 bytes from 25MByte :-)
> The actual procedure here is the createrepo is run on an x86_64 box over 
> these arm packages and then rsync'd on a server.
> 2) Using deltarpms fails
> Any advice welcomed, it would be great to reduce this 25MByte package 
> down since the vast bulk of it is exactly the same each time :-)
> -Andy

If you can get me ssh access to an arm machine, I'll look into both of
these problems. Please also open a bug against deltarpm (otherwise, I'll
totally forget about this).

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