Solved

what is Unicast clustering ? what is multicast clustering ? Can i someone explain me the difference?

Posted on 2011-02-14
3
354 Views
Last Modified: 2012-05-11
what is Unicast clustering ? what is multicast clustering ? Can i someone explain me the difference? This is pertaining to weblogic.
0
Comment
Question by:Gantagoru
3 Comments
 
LVL 3

Accepted Solution

by:
andreibutu earned 500 total points
ID: 34894278
0
 
LVL 11

Expert Comment

by:MajorBigDeal
ID: 34894316
I've never used weblogic, but this is what it means in general.

1. Unicast means a that a piece of information is being forwarded to a single address. In this case, since we are at layer 2, that piece of information is a frame.  If we were talking about layer 3, we would be talking packets and IP addresses. But since we are at layer 2 we are talking frames and MAC addresses.  

2. Multicast  means that a single frame is being addressed to multiple NICs at a time.

3. Clustering is having multiple hosts connected in such a way that they share a workload.

4. Load-balancing is using the multiple hosts efficiently so that the work is distributed across them in a way that increases throughput.

Keep in mind that regardless of  which method is used, all the hosts in the cluster receive the request.  Now the cluster has to communicate inside itself to see which host will process a particular fraction of the work.

If each host has 2 NICs you can use unicast. One of the NICs will have the same MAC on all the hosts in the cluster. The other NIC will have a unique MAC so the hosts in the cluster can peer-to-peer.

If the hosts only have one NIC then you have to use multicast clustering.  Again, each host's NIC will have the same MAC address. So now when the hosts need to talk they can use multicast.

Unicast clustering is more efficient but it needs 2 NICs in each host so it is more expensive.

0
 

Author Closing Comment

by:Gantagoru
ID: 35016539
The solution was partially correct
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Java string replace 11 54
How  can  i  resolve  HTTP Status 404 -? 8 43
Adding multiple JVM environments to RedHat 6 7 47
Apache LDAP Authentication 20 32
Over the last year I have answered a couple of basic URL rewriting questions several times so I thought I might as well have a stab at: explaining the basics, providing a few useful links and consolidating some of the most common queries into a sing…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
This video teaches viewers about errors in exception handling.

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question