Lynnedu


http://www.lynn.edu/

 

 

Notes about the drawing

 

Notes about this setup

 

Background on the project

We are a small team of 3 web designer/developers plus 1 primary support staff member in the university I.T. department. None of us had prior knowledge of Plone, Zope or Python. The first time I heard of Plone/Zope was March 2008. In June 08 we were developing custom content types with the help of Cignix and we launched in October 08. Of course, I think we are still at the base of the Plone learning curve.

 

Performance

In the 13 months since we launched the site, we have had some performance issues, but I'm inclined to believe it is due to our lack of Zope and Plone knowledge, rather than virtualization.

Despite a few hiccups, this has been relatively stable setup for us, though we often wonder if we would notice a performance gain in a non-virtualized environment.

Occasionally we have an issue where one, then the other, of the load-balanced Zope clients will stop responding to web requests, but when we look at the RAM/CPU usage and log on to the server, everything seems fine. Usually the CPU is elevated, but not pegged. None-the-less, we have to kill the process and start it up again. These issues seem to come in bursts. We go weeks with no problems, then have a few incidents over the course of a week or two.

 

Virtual Server Specs for Plone

LynnWebZeo:

Server - VMware

CPU - 4 x 2.3GHz Intel Xeon

RAM - 1536MB

Storage - RAID5/Fiber Drives/iSCSI

LynnWebZope1:

Server - VMware

CPU - 4 x 2.3GHz Intel Xeon

RAM - 2048MB

Storage - RAID5/SATA Drives/CIFS Share

LynnWebZope2:

Server - VMware

CPU - 4 x 2.3GHz Intel Xeon

RAM - 2048MB

Storage - RAID5/SATA Drives/CIFS Share

LynnWebZope3:

Server - VMware

CPU - 4 x 2.3GHz Intel Xeon

RAM - 2048MB

Storage - RAID5/SATA Drives/CIFS Share

Physical Server Specs

Hosts are HP ProLiant G5, each with Quad Core Intel Xeon 2.33GHz and 20GB RAM

VMware Specs

VMware ESX 3.5 with VMware Virtual Center 2.5

Plone Specs

Currently: Plone 3.3.1, Zope 2.10.9

LynnWebZope2&3:

cache-size: 20,000

zserver-threads: 4