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This blog is about the development of my various Linux based web sites, starting with raspberrywebserver.com and Pyplate Python SQlite CMS.
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Testing my Odroid in my server cluster

Posted 10-23-2013 at 07:10 AM by Pyplate

After adding my Odroid U2 to my cluster, I ran tests using siege on the front end of the cluster. There was an increase in performance, but it wasn't the increase I was hoping for. I logged into some of the Pi nodes using ssh and ran uptime to check the load. The Pi nodes weren't working particularly hard, and neither was the Odroid. I logged into the load balancer and checked the uptime and memory usage:
Code:
$ uptime
 13:30:04 up 1 day,  5:20,  1 user,  load average: 9.27, 3.52, 1.33
$ free
             total       used       free     shared    buffers     cached
Mem:        498268     487188      11080          0      37328     299752
-/+ buffers/cache:     150108     348160
Swap:       513020         20     513000
Load average figures for the load balancer are much higher than for any of the worker nodes, and the load balancer is starting to use swap space. The load balancer is quite an old PC with only 508MB of RAM (you'd think it would be 512MB, but for some reason this PC has 508MB). I need more memory in my load balancer. In the short term, maybe I can remove a few unneeded services to free up some memory.

On the up side, it seems that the backend of my server is quite powerful.
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