[consulting] Drupal server requirements

[Khalid B]

> We are writing a proposal for a client site with potential of  100,000
> unique visitors per months.  The registered site users can be ranging
> from a few thousands to 10,000.   However, we expect at any given time
> there might be only up to a couple hundreds active users logged in,  the
> activities that the logged in users will do will mainly be:  posting
> content, private messaging/contacting each others and downloading some
> white papers from the site etc.   We will use Organic Groups module so
> user roles are controlled via OG, we will also have multi-lingual
> support in the near future.
>
> We have not built any large drupal sites before, although there are some
> posts on the drupal.org but still feel very unease in terms of coming up
> with a set of server capacity requirements, any pointers or suggestions
> will be greatly appreciated. We are thinking of the following dedicate
> server configuration as a start, are we on track or too far off?
>
> - Intell 3.2 GHz P4 processor
> - 2GB RAM
> - plenty disk space
> - RAID 1 for redundancy

Another code  cache to consider is APC

Also:
- Spread the  database over  many disks, or better yet, on its own server
- Read the posts in here http://drupal.org/forum/49