Bug 186891

Summary:	feature: make yum use rsync to minimize data download
Product:	[Fedora] Fedora	Reporter:	James Hunt <jamesodhunt>
Component:	yum	Assignee:	Jeremy Katz <katzj>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5	CC:	katzj
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-04-03 04:10:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description James Hunt 2006-03-27 09:01:57 UTC

Description of problem:

If yum could be integrated with rsync, the amount of data downloaded for updates
could be minimized.

For example, if the users machine already has kernel-xxx.rpm sitting in
/var/cache/yum/, and yum determines that a new kernel (kernel-yyy.rpm) is
available as an update, allowing rsync to analyze kernel-xxx.rpm to see the
similarities to kernel-yyy.rpm may well reduce the actual amount of data
required to create kernel-yyy.rpm on the local system.

Logic:

if ( package_update_available )
{
  if ( cached_version_of_package_on_local_box )
  {
    /* rsync "/var/cache/yum/old_package_version.rpm" against
     * http://fedora.redhat.com/..../new_package_version.rpm".
     */
  }
  else
  {
    /* download as normal. */
  }
}


Version-Release number of selected component (if applicable):


How reproducible:


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Additional info:

Comment 1 Seth Vidal 2006-04-03 04:10:37 UTC

wontfix.

rsync is not a good idea for mirrors, if nothing else.