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

Loaded plugins: presto
Setting up Update Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running
yum-complete-transaction first to finish them.

--> Running transaction check
---> Package txtr-reader.armv5tel 0:0.1-420.fc11 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

================================================== ==============================
Package Arch Version Repository
Size

================================================== ==============================
Updating:
txtr-reader armv5tel 0.1-420.fc11 txtradevel
24 M


Transaction Summary
================================================== ==============================
Install 0 Package(s)
Update 1 Package(s)
Remove 0 Package(s)

Total download size: 24 M
Downloading Packages:
Setting up and reading Presto delta metadata
Downloading DeltaRPMs:
Rebuilding rpms from deltarpms
/var/cache/yum/txtradevel/deltas/txtr-reader-0.1-417.fc11_0.1-420.fc11.armv5tel.drpm:
md5 mismatch of result
Error rebuilding rpm from
txtr-reader-0.1-417.fc11_0.1-420.fc11.armv5tel.drpm! Will download full
package.

Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : txtr-reader
1/2
Cleanup : txtr-reader
2/2


Updated:
txtr-reader.armv5tel 0:0.1-420.fc11



Complete!

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

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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
<snip>
>
> 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).

Jonathan
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On 12/16/09 14:12, Somebody in the thread at some point said:

Hi -


Is yum-presto known to work on arm? Today I changed our repo to use
deltarpms and tested it out. I noticed...



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).


Thanks for the quick reply... I will see about setting something up and
get back to you.


https://bugzilla.redhat.com/show_bug.cgi?id=548068

-Andy

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