Bug 157165 - Needs 'single component loop' mode for massive up2dates
Needs 'single component loop' mode for massive up2dates
Status: CLOSED DUPLICATE of bug 157149
Product: Fedora
Classification: Fedora
Component: up2date (Show other bugs)
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All Linux
medium Severity medium
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Assigned To: Adrian Likins
Fanny Augustin
: FutureFeature
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Reported: 2005-05-07 20:25 EDT by Bob Gustafson
Modified: 2007-11-30 17:11 EST (History)
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Last Closed: 2005-05-07 22:45:36 EDT
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Description Bob Gustafson 2005-05-07 20:25:44 EDT
Description of problem:

  up2date works well for updating a single component, or nightly
updates of a few components. However, if you download the test CD images,
install, and then do an update, there is a massive number of components
that need updating - and up2date just cannot cope.

(This is particularly the case when several weeks have gone by since
the CD images are available)

There are several problems in the massive update process. If there is
a failure in one update, then the whole run is scrubbed. Unfortunately,
there is a high probability of a 404 error in download, or some other
problem in one or more components. With the existing process, one just
waits until some unseen demon slaving away in the server fields corrects
the problem, or one hopes that there is enough randomness in the server
selection algorithm that a different (with correct contents) server is selected
for that component.

Also, the pre-requisite determination algorithm is probably not O(0) -
thus the more things that require update, the longer it takes (and more
memory, etc) to come up with a complete list.

----

So, how have I coped? I just wrote a script wrapper around up2date.
It asks up2date for a list of components which need updating and
then goes through the list one by one. This has the advantage that
a failure knocks out only that one component - the process can trudge
on. When through one pass, the number of components left to be caught
on the second pass are only those that failed - a much smaller number.

Another advantage is that the up2date process can go on unattended.
(So far, I am into 12 hours on a Gateway Solo 2150. The bottom is
quite warm, the network speed seems to be upwards of 100kB/s, and
there is a high probability that by tomorrow, it will be pretty well
updated).

The disadvantages are that there is considerable duplication in
redoing the header download, etc. each time. Also, if a component
has pre-requisites, these pre-requisites are loaded again (if they
are lower in the initial list). The script can sense these and
remove those components from the list, but my script was originally
for yum and I have not adjusted the parsing for the new up2date version.

----

So, it would be nice if up2date would have a mode which would do
what the script does - and eliminate the redundancies within up2date.

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Comment 1 Bob Gustafson 2005-05-07 22:45:36 EDT

*** This bug has been marked as a duplicate of 157149 ***

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