[Server-devel] Server-devel Digest, Vol 10, Issue 12

[Tony Pearson]

Greg,
For the Library Servers, here is an example of using "Ultra Monkey" for a 
load-balanced clustered Apache system:

http://www.howtoforge.com/high_availability_loadbalanced_apache_cluster

Basically, there are two "load balancers" and they share a Virtual IP 
address (VIPA), so that all of Nepal goes to this virtual IP, and it 
will get picked up by either load balancer.  Then the load balancer sends 
the data to one or the other of the two Library Servers.

The advantage is that you can lose either of the load balancers, and 
either of the Library servers, and still have a running system.

BTW, this is how all the major websites (CNN.com, etc.) do it, except they 
have perhaps 20 "Library Servers" sharing the load.

Tony





Tony Pearson
Senior Storage Consultant, IBM System Storage?
Telephone: +1 520-799-4309 |  tie 321-4309 |  Cell: +1 520 990-8669
email: tpearson at us.ibm.com |  GSA: http://tucgsa.ibm.com/~tpearson
Blog: http://www.ibm.com/developerworks/blogs/page/InsideSystemStorage 
AKA: 990tony Paravane, eightbar specialist 


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