[NTLUG:Discuss] Clustering related

[Jay Urish]

At 08:14 PM 3/26/2003 +0000, you wrote:
>Speak about clustering, I have a question on how to do a web server 
>cluster on Linux boxes.
>
>this is waht I want:
>2 or 3 (web) servers running for mydomain.com (example) domain
>when all servers are running, they share the requests (if there are 100 
>requests, each of them get 33,33,34 requests)
>if there any of them is (are) down/fail/die..., the rest of live ones take 
>over the them.
>
>how is this possible?

You need BigIP from F5 labs...




>thanks
>
>>From: Greg Edwards <greg at nas-inet.com>
>>Reply-To: NTLUG Discussion List <discuss at ntlug.org>
>>To: NTLUG Discussion List <discuss at ntlug.org>
>>Subject: [NTLUG:Discuss] Clustering
>>Date: Tue, 25 Mar 2003 13:01:10 -0600
>>
>>I've got a friend that I finally got to join the list but he's still 
>>lurking.  I'll get him to speak some day ;)
>>
>>He was unsure of the term clustering so I thought I'd try and wing a 
>>general description and let those that know correct my foul-ups.
>>
>>In general (as I understand it) a cluster is an attempt to make resources 
>>from a group of computers look like 1 computer to a running program.  The 
>>cluster may share files and/or memory.  The one thing that the cluster 
>>cannot share is executing programs.  While the code and constant sections 
>>could (in theory) be shared it wouldn't be worth the effort.
>>
>>A cluster is generally used to provide load balancing and/or parallel 
>>computing solutions.  In a load balance solution file usage and access is 
>>primary while a parallel solution needs memory usage and access to be 
>>primary.  In either case the programs found on the nodes of the cluster 
>>are identical (excluding master/slave issues) since the goal is 
>>essentially a resource bottleneck solution for a single logical process.
>>
>>Amazon is a good example of where a load balance solution is needed while 
>>Lucas Studios is a good example where a parallel computing solution is needed.
>>
>>--
>>Greg Edwards
>>New Age Software, Inc. - http://www.nas-inet.com
>>======================================================
>>Galactic Outlaw        - http://goutlaw.nas-inet.com
>>   The ultimate cyberspace adventure!
>>
>>
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