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Re: Boot speedup with readahead



On Thu, 11 Sep 2008, Dominik 'Rathann' Mierzejewski wrote:

On Thursday, 11 September 2008 at 10:34, Panu Matilainen wrote:
On Wed, 10 Sep 2008, Seth Vidal wrote:

On Wed, 2008-09-10 at 14:14 -0400, Colin Walters wrote:
On Tue, Sep 9, 2008 at 5:33 PM, Seth Vidal <skvidal fedoraproject org>
wrote:

Here's a proof of concept plugin:

http://skvidal.fedorapeople.org/misc/post-transaction-actions/

Ok cool - with one small fix to the plugin, this simple action:

Thank you, I've applied this to the one I uploaded above.

So this seems to work - now the question is - should we push for this to
go into rpm instead?

Not instead, but to rpm *too*, yes.

Quite obviously an action that's currently done from say %post script
should stay at rpm level, moving some things to be only done once per
transaction is just an optimization really. But yum knows a lot more about
the surrounding world than rpm does, such as which repository a package
came from which is something rpm has no clue about, and thus it can do
things in post-transaction that rpm simply could not do.

Granted, but why would it matter where a package came from? All packages
should be treated the same, regardless of their origin. I smell some
package racism brewing up here. ;)

Where a package came from is just one example of things that yum knows that rpm doesn't. Whether there's any real use-case for that particular piece of information is entirely different question. The point is that yum is in position to do various things that rpm cannot possibly do because they operate on different levels and with different amount of information available to them.

	- Panu -


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