----- Original Message -----
From: "STEVEN MOORE (IFL)" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: 15 December 1999 17:12
Subject: RE: [IMail Forum] Scalability
> Hi Wayne,
>
> We probably run user counts of the same order of magnitude on Imail
however
> over many smaller (though still beefy) servers, we are looking to get
better
> use out of our servers and scale the number of users up, whilst using SQL
to
> allow better administration.
>
> Is there any particular part of the Imail software that falls over more
> often.
pop3 requests stop authenticating.
> In particular I'd be really interested in problems you've experienced with
> the IMAP4 and SMTP services.
> Also is this the standard ODBCuser.dll or a custom fixed version?
standard.
with a work around for the fact that it won't work multi-processor/ threaded
correctly.
1 in 3 auths fail due to cursor conflict:
http://support.microsoft.com/support/kb/articles/q175/9/04.asp
so we have to direct it via an access db with linked tables.
>
> As an aside we experience some problems whilst hammering a competing, but
> similar, product when the amount of active threads or handles were pretty
> large (1000+, 2 processors), windows NT seemed to lose connection to
shares
> and other RPC based systems. We basically put this down to the ratio of NT
> server threads to application/service threads, we didn't get much evidence
> though.
>
Not noticed anything like that..
>
> As an other aside I would wonder what happens when the dll is being called
> by many threads at once to provide connections to the SQL server. The
> documentation for the dll seems to suggest that it is kept active after
the
> first connection, I wonder if it can handle multiple threads at all. (I do
> not really know enough about multithreading to comment on this last bit.)
>
>
> Thanks for any experiences you had.
>
>
>
> Steven Moore
>
Wayne.
{Callnetuk.com Admin}
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