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Re: [PATCH 0/3] Preliminaries for headerless install callback



On 02/18/2011 05:29 PM, seth vidal wrote:
On Fri, 2011-02-18 at 07:09 -0800, John Reiser wrote:
On 02/18/2011 04:22 AM, Panu Matilainen wrote:
Traditionally yum has used (rpm-header, path) tuple as the "key" for
callback to locate the package to-be-installed, but this has the
downside of keeping the full rpm headers of all installed packages
to be loaded throughout the entire transaction, wasting (tens of)
megabytes of memory when it only really needs is nevra info to locate
the relevant yum package object.

Not only that, it wastes 2.5 minutes during a fresh install,
extracting the header from each .rpm into a .hdr file.
For a DVD the constant seeking is hard on the drive.
https://bugzilla.redhat.com/show_bug.cgi?id=522838


Anaconda is still downloading the pkgs one at a time right and then
installing, right?

If so then it will still need the hdrs do to the file-conflicts check.
Not sure how the above patches get around that.

This is not about getting rid of headers completely - rpm needs them as much as it always did. These patches are about avoiding keeping all headers unnecessarily loaded in memory for the entire transaction.

	- Panu -


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