Jürgen Herz wrote:
But like all other clusters too, the load is very unequally distributed over the machines.
[snip]
Where does this come from, or is this wanted? Wouldn't a more balanced load be better?
More balanced would likely be better. Spreading load evenly seems to be really hard to get right; if you have advice based on experience I'm sure we'd love to hear it.
Other point: The Yahoo! Squids do virtually nothing between 18:00 and 0:00 (and machines besides yf1000-yf1004 to virtually nothing around the clock). How nice would it be make them helping out the other overloaded machines in Florida and Netherlands at least in these six hours.
What would they do during this time?
- Squids at lopar idle all the time since dns has been moved of them.
What where the problems with them and will they be back soon?
They're older, slower machines and can handle only a small fraction of what we pump through the Amsterdam cluster, so not too sure about these.
- Commons is very slow since the move from the prior "overloaded"
server to the new one. Any explanation to satisfy a simple user? And what server is the new one?
It was already slow *before* that. The files were moved to a faster internal server, but the web interface is still on a slow machine until things get finalized. This means images are still slow to load (alas) but don't bog down the primary wiki web servers as much when they poke at the images.
-- brion vibber (brion @ pobox.com)