Jesse Keating wrote:
On Sat, 2008-03-29 at 22:59 +0900, John Summerfield wrote:
Is it difficult to release jigdos?
The problem is this.
Jigdo would require the exploaded bits be available by http. Trying to
sync all that content around the mirrors in any sort of reasonable time
frame is not going to happen. Hanging the entire tree off of a single
http point is not going to happen either, that point would quickly drown
under the connections. We can't just rely on rawhide as tomorrow the
rawhide content will be different and you wouldn't be able to complete
your jigdo.
If we're to have any sort of fast to the public snapshoting, we have to
use a delivery mechanism that is capable of spreading the bandwidth load
throughout the users without bringing down the host. Right now, that
only leaves us with bittorrent as an option.
Now, if there were some way to combine bittorrent and jigdo and if jigdo
had better failover methods when mirrors are hit without the content we
could potentially do something better. Jigdo + rawhide + whatever you
already have for the majority of the content, bittorrent to suck down
the very last little bit or something along those lines.
I like Andrew's suggestion of keeping stuff around in the mirrors for a
time, and that will probably be beneficial to the mirrors as they will
become more reliable.
What problems a user might have in completing jigdo would depend on
timing wrt their mirror's update (and I will assume mirrors manage theri
refresh so the are consistent), and their download speed. I'm on ADSL2+
at a handy distance from my exchange and I can pull stuff pretty quickly
- 1.2 Mytes/sec and better, but I well remember pulling 3 Gbytes/month
through a modem - not everyone does so well. For me filling out a jigdo
isn't hard.
Using bittorrent at all is still a problem for those with unfriendly
firewalls; is rsync from a master copy an option?
Ideally someone would write a script to wrap the whole procedure so it's
not "too much trouble" for users.
--
Cheers
John
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