[RCU] Question about hw specs for roundcube

Jorge Valdes jvaldes at intercom.com.sv
Tue Mar 22 16:27:31 CET 2011


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On 03/22/2011 07:59 AM, emilio brambilla wrote:
> hello,
>
> On 03/21/2011 03:57 PM, Javier de Miguel Rodriguez wrote:
>
>> We want to use Roundcube 0.5.1 on Linux (RHEL 5.6 x64). We want to use
RCU&
>> mysql in the same host, and we will have a maximum of 1.500 concurrent
users.
>
> with 1500 concurrent users you mean 1500 different users connected to
> the web interface at the same instant? if so you will need more than a
> single web server and, perhaps, also a mysql cluster on different hosts
> than the web servers. (also don't forget to use imapproxy to avoid to
> start/stop imap connections every click of the user)
>
> 1500 imap concurrent connection on a dovecot server is big, but 1500
> concurrent webmail users are a huge load for the servers
>
>> How much memory does roundcube uses? Any real-world experience?
> it depends on your apache and php configuration... to have real numbers
> you should measure it on a staging box with your apache and php
> configuration and some users with mailbox and folder sized like the real
> mailboxes on the production environment.
>
You should also look into another web-server (lighttpd/nginx) which
scale better and
have better throughput than apache, also having a FCGI process will
speed-up requests.
You might not be able to deliver service to 1500 users using only one
web-server, but
definitely less servers than apache.

If you have 1500 mailboxes, measure concurrent connections, since these
can be at least
an order of magnitude less (maybe two). If this is the case, a single
server may be
feasible.
- -- 
Jorge Valdes
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