Hi all,
It seems to me that my mail only went to Zoilo Gomez, but not into the
list. At least it didn't reappear from here since last Friday. So I'm
posting it again.
Zoilo Gomez schrieb:
But I was not too impressed with these Google responses. Some of the
responses in this list however I found quite valuable and interesting;
so thank you all for the support!
Let me just add a few screenshots of my "Screen 6" keeping all the
technical stuff watching my LTSP server. I don't want to flood this list
with the pictures, so I stored them on our website and hope the links I
type in are working for everyone.
The server is a double Xeon with 2.4 GHz and 4 GB RAM, simple 100 MBit
network and two SATA HDs.
On the first screenshot http://www.eilert-sprachen.de/temp/bild1.png you
can see a typical situation of higher load.
The panel on the left shows the two labs. It belongs to the program on
the lower right showing the "who" list and the number of users.
There are two groups working in our two labs, at least one of them
appearently works with wine (Word I guess). I can see this from the
large yellow CPU load topping the blue one. There is less buffer in RAM
(yellow) but a lot of blue one for the apps running (almost 800
processes at this time). But you will also see that a few folks logged
out recently, the curves going down slightly and some of the places
changed from green to gray.
Don't wonder about that "CPU 39%" window - this window watches the
internet router, and it is not the LTSP server's CPU load.
The break comes in http://www.eilert-sprachen.de/temp/bild2.png and
students are leaving the labs. RAM usage goes down but does not increase
buffer at first. Of course, nobody switches off her/his computer but
just loggs off, so they all remain gray - and consume power :-) By the
way, that hight network load is unusual and only occurs when several
folks watch internet sites with animated gifs or flash animations.
Next lesson begins in http://www.eilert-sprachen.de/temp/bild3.png and
you can see that the moment of many users logging in at the same time
takes a lot of CPU power. As soon as everyone is logged in, CPU load
goes back to normal.
Picture http://www.eilert-sprachen.de/temp/bild4.png shows a situation
early in the morning with only a handful of bored folks logged in and
RAM buffer extremely large.
Let me just add http://www.eilert-sprachen.de/temp/bild5.png to show an
extreme login situation. One group went into the second lab which was
empty before and logged in almost parallely. It's obvious that the
server has problems to balance this load, but as I was working on the
machine at the same time I can confirm that I did not feel this load (e.
g. slower opening of windows etc.)
Hope you can watch the pictures and take some information from it.
Regards
Rolf
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