[imp] Scaling - how many logins per day are people supporting ?

Patterson, S R S.R.Patterson@soton.ac.uk
Fri, 3 Aug 2001 09:48:11 +0100
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---------------------- multipart/mixed attachment
I'll top post this for clarity.

We're using a Dual 400M E250 with 2G also and we're supporting 3000
unique users logging in per day, probably at least twice that if you
count each individual login.  I reckon it could scale by a factor of
at least three.  The same box runs the IMAP server and in fact due to
a lack of machines that same IMAP server is also serving about 6,500
unique users of normal mail clients per day (again you can at least
double that for the total number of logins).

The machine is on the ATM backbone and has a dedicated 100M link to
the file server which serves the mailboxes.  In about a month we'll be
chucking out the ATM backbone in favour of a new gigabit backbone at
which point we expect this server to have a 100M link onto the
backbone and a 100M link to the fileserver and cope sufficiently well.

HTH, Steve
-- 
Steven Patterson, MSci ----------------------------------------------+
|       Electronic Information Systems Support and Development       |
|         Computing Services, University of Southampton, UK.         |
+-------------------------------------------- Tel: +44 (0) 2380 595810
......                                                          ......
..       Conviction is a bigger enemy of the truth than lies.       ..
......                                                          ......

> -----Original Message-----
> From: bob.reven@unix1.trinity.ox.ac.uk
> [mailto:bob.reven@unix1.trinity.ox.ac.uk]
> Sent: 03 August 2001 06:58
> To: imp@lists.horde.org
> Subject: Re: [imp] Scaling - how many logins per day are people
> supporting?
> 
> 
> Quoting Michael Bull <mbull@uoguelph.ca>:
> > We've had IMP running for some time now, and we're watching 
> how we might
> > need to scale in the future.  Currently, we've got it 
> running on a twin
> > CPU  Sun E250 with 2GB of RAM, with an IMAP server on a 
> separate message. 
> > It's supporting about 3000 logins/day (I just grep -c 'd 
> the log for the
> > current day and the word "success" to get that).   How many 
> logins a day are
> > other  people supporting, and on what hardware?
> 
> at Oxford University they use a home grown perl based web 
> interface to their 
> IMAP servers called WING
>      http://users.ox.ac.uk/~mbeattie/wing
> 
> here is a recent message concerning load from one of the admins:
> ------------------
> One of Herald's WING servers (picked at random) is doing about 5000
> logins a day. It's a Pentium II 300MHz with 512MB RAM. This is
outside
> term time. Load is much heavier during term. At the moment we're
> seeing about 100 concurrent logins per WING server. This peaks at
300+
> during term time. The IMAP servers are currently seeing up to 300
> concurrent logins each.
> -------------------
> 
> yours,
> 
> bob reven
> 
> -- 
> IMP mailing list: http://horde.org/imp/
> Archive: http://marc.theaimsgroup.com/?l=imp&r=1&w=2
> Frequently Asked Questions: http://horde.org/faq/
> To unsubscribe, mail: imp-unsubscribe@lists.horde.org
> 
> 


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>From alois.blasbichler@sb Date:  Fri, 03 Aug 2001 10:44:36 +0200 (CEST)
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Subject: open a msword-attachement

a question, when i send with IMP an attachment, a MSWord-Document
in IMP when i make a click on the file i see only a window with "MS Word Viewer"
when i click on the diskette (download) i can open it with WORD or save it.

What i have to do, that i can open a word-file with a click,
its possible ??

thanks alois


>From janmailing@gmx.de Date: Fri,  3 Aug 2001 08:59:21 +0000
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Date: Fri,  3 Aug 2001 08:59:21 +0000
From: Jan Schneider <janmailing@gmx.de>
To: imp@lists.horde.org
References: <5.1.0.14.0.20010801165050.028113a8@staff.mail.uoguelph.ca> <996818266.3b6a3d5acaa46@unix1.trinity.ox.ac.uk> <996827260.3b6a607ccd155@unix1.trinity.ox.ac.uk>
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Subject: Re: [imp] having username as part of the IMAP servername

What about using JavaScript?
Put this in the input tag of the imp login form (2.3.7):

onchange="document.implogin.server.value=this.value+'.herald.ox.ac.uk'"

Jan.


Zitat von bob.reven@unix1.trinity.ox.ac.uk:

> at this university the central computing services have set up a cluster
> of IMAP servers. when a student is registered for email a DNS alias is
> created in the form username.herald.ox.ac.uk which points to whichever
> particular IMAP server they happen to be on. 
> 
> eg, an nslookup of trin0450.herald.ox.ac.uk shows that user trin0450
> is actually on imap5.herald.ox.ac.uk. 
> 
> users are then instructed to configure their IMAP clients with an IMAP
> server of username.herald.ox.ac.uk which has the advantage that users
> can be moved around from busy nodes to quiet nodes etc, without the user
> even knowing or suffering any noticeable loss of service
> 
> in our small corner of the university I would like to setup an IMP server
> but have come unstuck trying to define a server. i could just leave it blank
> 
> so users fill it in themselves but i would much prefer to be able to make
> IMP take the username and add it to a predefined string ie,
> .herald.ox.ac.uk
> and use that as the server name. i have tried a few crude attempts but
> failed. 
> 
> can anyone with more detailed knowledge of PHP and IMP suggest how this
> could be achieved with either 2.2.6 or 2.3.7
> 
> many thanks
> 
> sincerely,
> 
> bob reven
> 
> -- 
> IMP mailing list: http://horde.org/imp/
> Archive: http://marc.theaimsgroup.com/?l=imp&r=1&w=2
> Frequently Asked Questions: http://horde.org/faq/
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> 
> 


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:::::::::::::::::::::::::::
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fon +49.521.96878-0 :: fax  +49.521.96878-20
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>From janmailing@gmx.de Date: Fri,  3 Aug 2001 08:55:53 +0000
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Date: Fri,  3 Aug 2001 08:55:53 +0000
From: Jan Schneider <janmailing@gmx.de>
To: imp@lists.horde.org
References: <996819497.3b6a42296b8c6@hermesadm.chb.fr>
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Subject: Re: [imp] smalls Attachments problem again

Perhaps there was some misunderstanding.
You probably use French as you language in imp? What does you locale on the 
server imp runs on say? Type 'locale' in a shell.
If it says 'fr' after LC_NUMERIC you may type 'locale -c LC_NUMERIC'.
The first line of the output should give you the locale decimal point. How are 
floating point values written in French? 0.5 or 0,5?
This floating point (or decimal point) character should be in the $localeinfo 
variable.

Hope that helps,
Jan.

Zitat von Poirier Xavier <xpoirier@ch-bourg01.fr>:

> Hi,
> 
> sorry, but still not working ...
> here is what I made :
> :mimetypes.lib in "imp/lib" of imp ver 2.2.3
> 
> // set the size - bytes and kilobytes
>     $mime->bytes = (isset($mime->bytes)) ? $mime->bytes : 0;
> //  $mime->size = (isset($mime->bytes)) ? sprintf('%0.2f', $mime-
> >bytes/1024): '?';
>     $localeinfo = '.';
>     $mime->size = (isset($mime->bytes)) ? number_format($mime->bytes/1024, 2,
> 
> $localeinfo, '') : '?';
> } // mimeParse()    
> 
> is it wrong ? I don't understand what this code means.
> help please.
>                     7
>                    QS/
> /                 s@C#            /@^
>  @R            R@@@@@@~          ^@@    Xavier Poirier
>  G@@         G@@@@@@@@@@         R@~    Centre Hospitalier Bourg en Bresse
>   @@        CB@@RB@@#@@@@        B@     xpoirier@ch-bourg01.fr 
>   @@Q       R@@   /   B@@K      S@@^    
>   @@@       @@/ B O @ 7@@@      B@@ 
>   B@@R      @@~ R/@ # G@@@     S@@@ 
>   K@@@(     B@33R737SR7G@@     B@@@ 
>   7@@@@     B@%7777777e@@@    @@@@@ 
>    @@@@@    B@@G77777Q@@@@   B@@@@t
>    B@@@@@^  s@@@#77%@@@@@@ ^B@@@@@
> 
> 
> -- 
> IMP mailing list: http://horde.org/imp/
> Archive: http://marc.theaimsgroup.com/?l=imp&r=1&w=2
> Frequently Asked Questions: http://horde.org/faq/
> To unsubscribe, mail: imp-unsubscribe@lists.horde.org
> 
> 


:::::::::::::::::::::::::::::::::::::::: 
AMMMa AG - discover your knowledge
:::::::::::::::::::::::::::
Detmolder Str. 25-33 :: D-33604 Bielefeld
fon +49.521.96878-0 :: fax  +49.521.96878-20
http://www.ammma.de
::::::::::::::::::::::::::::::::::::::::::::::
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