simple questions regarding the session variable

I am seriving my webapp via WEBrick.

I start a Firefox browser #1. Somewhere along the way it performs:

            @session[:key] = 'A'

I start a second Firefox browser #2. Somewhere along the way it
performs:

            @session[:key] = 'B'

What I notice: the value of key in browser #1 is now B not A. I check
under
RAILS_ROOT/tmp/session and find a single session file only (where RAILS
is using PStore to write the session data)

So whether the browsers are started concurrently, overlapping, or one
at
a time, the same underlying session is being used. Surely the web
system
is smart enough to generate different session numbers even if the
client
browser is on the same IP? Or am I being the idiot?

How in the heck can I generate multiple sessions one per client on
WEBrick?
Will that technique work under Apache or Mongrel which I intend to
serve the
production version of the site.

I attempted to look under

http://wiki.rubyonrails.com/rails/pages/HowtoWorkWithSessions

but that and related documentation has been down for a while.

Shane

shane wrote:

I am seriving my webapp via WEBrick.

I start a Firefox browser #1. Somewhere along the way it performs:

            @session[:key] = 'A'

I start a second Firefox browser #2. Somewhere along the way it
performs:

            @session[:key] = 'B'

What I notice: the value of key in browser #1 is now B not A.

[snip]

This is happening because Rails and your browser identify the session by
its _session_id value stored in the browser cookie.

Another way to do this is to turn off the browser cookies support and use
my plugin for session persistent. Here each time you establish a new connection
a new session is created, even within the same browser (new tab) or new browser
window.

Long
www.edgesoft.ca/blog/read/2 - rails articles

Thank you (and all responders). In the near future I will have to take
Long's advice and move off Pstore based session files anyway which are
slow.