Solved

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

Posted on 2011-02-14
3
353 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

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
factorial example 4 39
SHA2 certs for IIS AND Java? 2 80
how to see all occupied ports on windows 10 laptop 15 61
throw exception 21 43
In Solr 4.0 it is possible to atomically (or partially) update individual fields in a document. This article will show the operations possible for atomic updating as well as setting up your Solr instance to be able to perform the actions. One major …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

786 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