It compares well to Zimbra and it runs on my dear SME7.
It is easier to manage than EGroupware (although with less modules ie infolog).
It is spectacular with the UI looking like Outlook.
It is easy to learn with less options than MS-Outlook.
It runs well on a small server (probably because of AJAX).
With Outlook:
It is more expensive than cyrus-imap with Toltec: Zarafa is 28..45EUR vs Toltec at 13USD. But! There is no need for Outlook with this WebAccess software.
It is a lot less "intrusive" in the normal SME7 than installing cyrus-imap. But cyrus-imap adds a lot to the server.
It is more likely to survive yum updates (this remains to be seen... well in fact I have a doubt here
)
BTW: Zarafa is the Arabic word for giraffe. This software is open source since september (Affero GPLv3). They say:
In an effort to sponsor and support the creation of an enterprise open source exchange replacement, the company will contribute the full core of the server-side source code of the Zarafa platform – known for its 100% MAPI compatibility and flexibility – to the community. This will allow more options for compatibility, localization, enhancements and further integration options with other systems.
see
http://zarafa.com/?q=en/18-sept-open-sourceAlso:
For a general rule-of-thumb, you should use to following RAM distribution:
• sortkey_cache: 1MB per concurrent user
• cell_cache: around 25% of total RAM size
• innodb_buffer_size: around 25% of total RAM size
• mysql_query_cache: a few MB
This will cause around 50%-60% of your RAM to be tied up in caches for MySQL and Zarafa. The
actual memory usage of the MySQL and Zarafa will then be slightly more than this, giving a total of
around 80% of your RAM size.
Thanks to Jester and Darrell!