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Subject FW: [Q] session mgmt
Date Fri, 02 Jun 2000 03:09:31 GMT
Sorry, it did not look like the email got sent
the first time.

-----FW: <>-----

Date: Thu, 01 Jun 2000 21:53:49 -0500 (EST)
Subject: [Q] session mgmt

I have difficulty in designing
highly scalable session management,
mod_perl is the tool I would like
to use, but so far I cannot see
how to do it in anything other
then hand-coded C++ or use transaction
management software such as MTS.
Basically, the system I am building
has to be distributed with load-balancing
going across heterogenus computer systems.
When a user logs in, he may be doing something
on Page 1, then he decides to go to Page 2,
from Page 1 to Page 2, the system will have
to perform a long query.  I do not want the
user to wait, therefore I allow him to go to
page 2, but in the mean time I want to show him
some kind of progress bar that demostrates that
his request from page one is being worked on.
Then he spends an hour on page 1 (refreshing
once in a while the view of the data charts),
and then goes to page 3. Things on page 3
take very long time to execute, I will have
load balancing software redirect the request
to other web servers (that are not the once
who handled requests from Page 1), and on Page 3
I need info from Page 1.

So my questions are: how to save session info
from page 1 and allow a web server that services
age 3 to access it.  Second, (this is probably not
related to mod-perl) is how to show a progress
bar while allowing a user to continue through
other pages (frames).

MS suggests to use their 
distributed directory services to store session
info (instead of cookies) and they do not suggest
to use a DB for performance reasons. I would like
to know if there are alternatives to MS solutions.

Thanks in advance,

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