load balancing and clustering concepts
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load balancing and clustering concepts

 
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Guest
Posted: Thu Oct 20, 2005 8:50 am    Post subject: load balancing and clustering concepts Reply with quote
I want to make sure I understand the fundamental concepts between
clustering and load balancing. The followings are the key points I
made, please comment and advise.

1) clustering (or clustered-servers) means to group multiple (2 or
more) servers together that serves as a single server to the clients.

2) load balancing only CAN apply to clustered servers (2 or more
servers), because the idea is to balance the load equally. It doesn't
make sense to apply load balancing to a single server. i.e. When we say
load balanced servers, we mean load balancing has applied to clustered
servers.

3) clustered servers don't necessary are load balanced, since we need
load balancing hardware that connects to clustered servers.


Please advise, thanks!!
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Cyrille Le Clerc
Guest
Posted: Thu Oct 20, 2005 4:50 pm    Post subject: Re: load balancing and clustering concepts Reply with quote
Hello,

Are you aware of the following Websphere RedBooks :

- "IBM WebSphere V5.1 Performance, Scalability, and High Availability
WebSphere Handbook Series" :
* http://www.redbooks.ibm.com/abstracts/SG246198.html

- "WebSphere Application Server V6 Scalability and Performance
Handbook"
* http://www.redbooks.ibm.com/abstracts/sg246392.html

They are "must read" docs to implement load balancing / failover
with Websphere. Believe me, the time you will spend today reading will
be a lot of money spared tomorrow :-)

Hope this helps,

Cyrille
--
Cyrille Le Clerc
cleclerc@pobox.com
cyrille.leclerc@fr.ibm.com
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Paul Ilechko
Guest
Posted: Fri Oct 21, 2005 5:53 am    Post subject: Re: load balancing and clustering concepts Reply with quote
apngss@yahoo.com wrote:
Quote:
I want to make sure I understand the fundamental concepts between
clustering and load balancing. The followings are the key points I
made, please comment and advise.

1) clustering (or clustered-servers) means to group multiple (2 or
more) servers together that serves as a single server to the clients.

2) load balancing only CAN apply to clustered servers (2 or more
servers), because the idea is to balance the load equally. It doesn't
make sense to apply load balancing to a single server. i.e. When we say
load balanced servers, we mean load balancing has applied to clustered
servers.

3) clustered servers don't necessary are load balanced, since we need
load balancing hardware that connects to clustered servers.


Please advise, thanks!!


Very little of what you say is correct. I suggest you follow the
recommendation given earlier and do some reading.
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