On Feb 23, 6:10 am, Thierry Dumont <tdum...@math.univ-lyon1.fr> wrote:
Hi Thiery,
> After many months waiting for computers, I am now ready to start an
> installation of Sage for all the undergraduate students of my University.
Nice.
> We will have a maximum of about 250 simultaneous connections.
Hehe, that might be a busy server then :)
> Be prepared to read a lot of questions on this list !
>
> The material: I have 3 Sun V40Z machines (each one as 32 GB of RAM, 4
> dual core processors). It is a sort of revamped material, robust and not
> expensive.
>
> My first questions:
> ==================
>
> 1) My idea is to launch 8 Sage servers on each machine (as many as core
> processors); each server will listen on a different port. Then I will
> manage a web server. The home page will redirect the students at random
> on one of the 3x8 servers. The identification is made on the Ldap
> (actually Active Directory :-( ) of the University.
> What do you think of that ?
> Ldap authentification is working fine.
I would launch only one server per machine, maybe two. Each worksheet
runs in its own process, so if you have eight users doing simultaneous
computations all eight cores will be employed. Having 8 Sage servers
per box seems to be more prone to failure.
> 2) File sharing: nowadays the worksheets are located in
> .sage/sage_notebook/worksheets/
> I would like to put them on an nfs share (mounted on all the 3 machines).
> What do you think of that? Is there any incompatibility ?
I am not aware of any problem. Note that Sage 3.3 fixed a rather
annoying bug where frequent snapshots were made each 3 minutes of each
running worksheet even if no changes occurred.
> Yours,
> Very sincerely
>
> Thierry Dumont.
In general there are a bunch of suggestions like setting timeouts for
the python processes and so on to avoid overloading the server. Do you
have any more info about the setup, i.e. how long do you need to go
between upgrades (say some people cannot or do not want to upgrade
while classes are in session or even the whole academic year, etc.).
Cheers,
Michael
> -------------
> French universities are on a permanent strike!
> Have a look at the International Call:http://math.univ-lyon1.fr/appel
> -------------
>
> tdumont.vcf
> < 1KViewDownload
>
> smime.p7s
> 5KViewDownload
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