Weblogic Clustering Advantages + Disadvantages

Hi All,
I have a query about Weblogic clustering concept. First of all I would like to explain my environment architecture.We have SOA and ADF domain configured with High Availability mode in weblogic level.
ie SOA is installed in two servers ( primary & secondary ) and ADF respectively. So total 4 servers.
My Query is : Just want to know about advantages and disadvantages if we configured both Primary and
Secondary in Cluster mode and Stand alone mode in Weblogic.

Hi,
There are no disadvantages as such with the clustering feature.
But you can go through the basic advantages that a clustering feature provides:
http://docs.oracle.com/cd/E11035_01/wls100/cluster/overview.html#wp1011562
Thanks,
Sharmela

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Hi All,
I am planning to upgrade weblogic server (Base) Advantage version 6.1 SP4 to Weblogic Server Advantage 8.1 non production.
I tried logging the upgrade through the support site.
The site provided us upgrade option as
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Hi Jayesh,
Thanks very much for your reply.
I understood that your reply "You might want to consider collapsing front end (servlet & JSP) and back end (EJB) servers into a single WebLogic server for better fail over support." means that JSP&Servlet and EJB should be combined to form a single archive(EAR) which has to be deployed in single weblogic instance.
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Other trivia such as CPU, RAM + Disk configuration might also be useful.
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Dear all,
Can you kindly explain me the Advantages/disadvantages,Capabilities,Failures of Types of mapping.
what is the parser XSLT uses.
what is differnece between sax/dom parsers.
Thanks,
Srinivasa

Hi srinivas phani ,
The following websites give u good documentation on Mapping:
Excellent PDF Document on Mapping
http://help.sap.com/bp_bpmv130/Documentation/Operation/MappingXI30.pdf
Mapping Development with the ABAP Workbench
http://help.sap.com/saphelp_nw04/helpdata/en/10/5abb2d9df242f6a62e22e027a6c382/content.htm
ABAP Mappings
http://help.sap.com/saphelp_nw04/helpdata/en/ba/e18b1a0fc14f1faf884ae50cece51b/content.htm
how to create a flat file out of an IDoc-XML by means of an ABAP mapping program and the J2EE File Adapter.
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/46759682-0401-0010-1791-bd1972bc0b8a
How to Use ABAP Mapping in XI 3.0
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/e3ead790-0201-0010-64bb-9e4d67a466b4
SAXParser
Both DOM and SAX approaches have advantages and disadvantages, and your choice of technique must depend on the type of data being parsed, the requirements of your application, and the constraints under which you are operating.
The SAX approach is linear: It processes XML structures as it finds them, generating events and leaving the event handlers to decide what to do with each structure. The advantage of this approach is that it is resource-friendly; because SAX does not build a tree representation of the document in memory, it can parse XML data in chunks, processing large amounts of data with very little impact on memory. This also translates into better performance; if your document structure is simple, and the event handlers don't have anything too complicated to do, SAX-based applications will generally offer a speed advantage over DOM-based ones.
The downside, though, is an inability to move around the document in a non- linear manner. SAX does not maintain any internal record of the relationships between the different nodes of an XML document (as the DOM does), making it difficult to create customized node collections or to traverse the document in a non-sequential manner. The only way around this with SAX is to create your own custom object model, and map the document elements into your own custom structuresa process that adds to complexity and can possibly degrade performance.
Where SAX flounders, though, the DOM shines. The DOM creates a tree representation of the document in memory, making it possible to easily travel from one node to another, or even access the same node repeatedly (again, not something you can do easily in SAX). This tree representation is based on a standard, easy-to-understand model, making it easier to write code to interact with it.
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Further differences can be seen in the following websites
http://articles.techrepublic.com.com/5100-22-1044823.html
Parsing XML Efficiently : DOM Parsing ,SAX Parsing
http://www.oracle.com/technology/oramag/oracle/03-sep/o53devxml.html
SAX Example
http://www.informit.com/articles/article.aspx?p=26351&seqNum=6&rl=1
Event or DOM parsing?
http://discuss.joelonsoftware.com/default.asp?design.4.156750.12
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http://xerces.apache.org/xerces2-j/samples-sax.html
Set up a SAX parser
http://www.ibm.com/developerworks/xml/library/x-tipsaxp.html
Simple API for XML (SAX)
http://en.wikipedia.org/wiki/Simple_API_for_XML
SAX Parser Benchmarks
http://piccolo.sourceforge.net/bench.html
XML Parsers: DOM and SAX Put to the Test
http://www.devx.com/xml/Article/16922/1954?pf=true
High-Performance XML Parsing With SAX
http://www.xml.com/pub/a/2001/02/14/perlsax.html
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http://www.javacommerce.com/displaypage.jsp?name=saxparser1.sql&id=18232
Class SAXParser
http://java.sun.com/j2se/1.4.2/docs/api/javax/xml/parsers/SAXParser.html
Class SAXParser
http://people.apache.org/~andyc/neko/doc/html/javadoc/org/cyberneko/html/parsers/SAXParser.html
SAX Parsers
http://webdesign.about.com/od/saxparsers/SAX_Parsers.htm
Interface SAXParser
http://excalibur.apache.org/apidocs/org/apache/excalibur/xml/sax/SAXParser.html
Class SAXParser
http://xerces.apache.org/xerces2-j/javadocs/xerces2/org/apache/xerces/parsers/SAXParser.html
DOM Parsing
Excellent website showing how 2 use Document Object Model (DOM)
http://www.w3.org/DOM/
Document Object Model (DOM) Parsing
http://www.xml.com/lpt/a/1597
Overview of DOM, DOM Level 3 core,DOM Level 3 Load & Save
http://www.softwaresummit.com/2004/speakers/GrahamJAXP1.pdf
Sample java program using DOM
http://mail-archives.apache.org/mod_mbox/cocoon-cvs/200305.mbox/%[email protected]%3Eorg/mod_mbox/cocoon-cvs/200305.mbox/%[email protected]%3E
Easy RFC lookup from XSLT mappings using a Java helper class
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/05a3d62e-0a01-0010-14bc-adc8efd4ee14
XML Transformation Using the TrAX APIs in JAXP
http://www.xml.com/pub/a/2005/07/06/jaxp.html?page=last
cheers!
gyanaraj
****Pls reward points if u find this helpful

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Weblogic Clustering Advantages + Disadvantages

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