[Fwd: Need Help on creating SMALL/Delta O.S. Builds] (schedule related)
jg at laptop.org
Fri Jan 5 10:02:13 EST 2007
Read the following note from Mark Foster: the earthquake south of Taiwan
has had serious impact on the ethernet.
We need to hit our dates one day earlier on the system image as a result
(I'm less concerned about firmware; it is so much smaller).
Ivan is worrying about tools to help with the data transfers of the
We're facing a very interesting infrastructure challenge here for our B2
build. As most of you may have heard, the recent earthquake near Taiwan
damaged most of the primary trans-Pacific fiber routes, leaving China
with extremely poor Internet connectivity. We're facing the reality of
that situation now, where we typically can't exceed 2-3KB/s throughput
on downloads. Interestingly enough, uploads from here are actually
quite fast, presumably due to the asymmetrical traffic flows between
China and the U.S.A.
As you might expect, downloading our typical large 120+MB O.S. images
isn't something we can do routinely. We've looked into a variety of
options, including the bsdiff/bspatch programs, which would presumably
let us send binary differences between O.S. builds.
An easier route might be to ensure that the release occurs at least 24
hours in advance of when we need it, during which time we might be able
to download a full O.S. build.
Please start thinking this over, for it looks like China won't be
the fiber lines in time to solve this "the right way"!
One Laptop Per Child
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From: "Mark J. Foster" <mfoster at laptop.org>
Subject: Need Help on creating SMALL/Delta O.S. Builds
Date: Fri, 05 Jan 2007 01:03:03 -0800
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