CLUSTERING

[Scunningham99]

Can anyone describe or explain clustering?!?!

any where it would be used.

Thanks in advance!!!

 

[KenCunningham]

Have you tried a search at docs.sun.com? As far as I know clustering involves the replication of one environment with another exactly the same, to allow seamless (ha!) failover in the event that one system dies. At least that was the theory when we used to cluster Sequents in a previous incarnation. There are a few threads in these forums which may also help.

 

[Scunningham99]

Thanks!!

 

[Butterfly123]

Well, clustering is a technology which sits on OS to increase the availability and scalability of applications running on a perticular host.

Its used in mission critical environments where the availability and scalability of application is important.. For example, database application, groupware application, mailing application etc..

The clustering software use the redundancy in the host hardware to maintain the availability of the applications running on cluster.

Hope this helps..

For further info, refer to docs.sun.com which has loads of material on sun clustering software.

In my environment, we use Veritas cluster with 4 Sun Enterprise 4500 servers for office database and mail application.

Regds,

- Hemant
Networking and Systems Integration Group
Satyam Computer Services Ltd

 

[bigscouse]

As the guys say clustering is usualy for mission critcal services. There are other options available such as HA (High Availability) where you duplicate as much of the platform as possible with automatic or manual fialover.
We have several clusters and we also have an inhouse solution that acts like a cluster where we have redundancy built in and applications designed to monitor themseleves and failover if problems are encountered.
Ged Jones

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