Posted by: Anonymous Coward
on April 26, 2006 05:09 AM
I appreciate the hard work of the author of this article and the article itself, however I find some statements misleading or inaccurate.
This statement I find very accurate: "Due to DNS caching and because some requests may use more resources that others, the load will not be shared equally," however the second part of that sentence is disobjective: "but over time it should be close enough".
Following paragraphs use a suggestive: "Some even take into account the actual load on each Web server to maximize cluster performance instead of just delegating incoming requests evenly.". It mistakedly suggests that the DNS Round-Robin model used in the example delegates incoming requests evenly.
On the countrary, this setup delegates DNS responses evenly which is very different from delegating http responses evenly. In order to delegate http responses evenly, a router must be used instead that alternates ip requests to port 80 and 443 between 3 separate servers.
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Re:How to configure a low-cost load-balanced LAMP
Posted by: Anonymous Coward on April 26, 2006 05:09 AMThis statement I find very accurate: "Due to DNS caching and because some requests may use more resources that others, the load will not be shared equally," however the second part of that sentence is disobjective: "but over time it should be close enough".
Following paragraphs use a suggestive: "Some even take into account the actual load on each Web server to maximize cluster performance instead of just delegating incoming requests evenly.". It mistakedly suggests that the DNS Round-Robin model used in the example delegates incoming requests evenly.
On the countrary, this setup delegates DNS responses evenly which is very different from delegating http responses evenly. In order to delegate http responses evenly, a router must be used instead that alternates ip requests to port 80 and 443 between 3 separate servers.
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