A cute little Case study

Qouted from :
http://raymondtay.blogspot.com/2008/09/j2eeweblogic-performance-tuning-with.html.
One of the excellent posts I have ever read.
his article contains a series of investigations for a customer of mine where the environment is running a WebLogic cluster of 20 machines in round-robin on HP-UX to service a global J2EE application and it performed slowly during peak periods and occasional hangs. The application [...]

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“check-passthrough” for defining cache ..

check-passthrough
The check-passthrough ObjectType SAF checks to see if the requested resource (for example, the HTML document or GIF image) is available on the local server. If the requested resource does not exist locally, check-passthrough sets the type to indicate that the request should be passed to another server for processing by service-passthrough.
The check-passthrough SAF accepts [...]

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All About Session

What’s a Session?
SSL makes a distinction between a connection and a session. A connection represents one specific communications channel (typically mapped to a TCP connection), along with its keys, cipher choices, sequence number state, etc. A session is a virtual construct representing the negotiated algorithms and the master_secret . A new session is created every [...]

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Creating SSL enabled origin server

If you already have an SSL enabled origin server you can skip this.
For ease of use I have used SJS Web Server 7.0 as origin server also.
Start the administration server, and go to wadm
>./wadm –user=admin
Please enter admin-user-password> ****
1. Create a self signed certificate
wadm>create-selfsigned-cert –config=test.sun.com –server-name=test.sun.com –nickname=My-CA-Cert
[...]

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Clustering at the Apache end

Clustering of services is done to avoid down time. Before that there are few things that you need to check if you really need a clustered service.

Cluster considerations:
How stateful [...]

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Summarizing the details on Jmap

Jmap is a very usefull tool to take heap dump for analysis on the memory part.
Java has become one of the most successful languages to hit the IT industry. One of the reasons behind it’s high rate of adoption is that fact that Java manages memory resources for the programmer. This makes programming significantly easier, [...]

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Network Programming with Perl

Perl has been called the glue that holds
the Internet together because it is an extremely powerful text
processing and CGI programming language. Although Perl was designed
in the beginning to be a text manipulation language, it has evolved
into a potent multi-purpose programming language. One area in which
Perl has shown its power is that of network programming.
Perl makes [...]

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URL Redirection Using Regular Expression

Sun Java System Web Server 7.0 Update 1 is enhanced to support regular expressions (also known as Patterns) and request time parameter interpolation in configuration files. In addition, wildcard pattern matching support is extended to server.xml. URL redirecting is implemented as a SAF. The redirect SAF lets you redirect URIs that match a certain prefix. [...]

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GREAT ORACLE FOURMS SEARCH !!!

AND HERES THE DIRECT LINK
http://forums.oracle.com/forums/search.jspa?threadID=&q=cluster&objID=c202&dateRange=all&userID=&numResults=30

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How to create a distributed WebLogic domain ?

A simple domain, with a cluster distributed on several machines.
�
Architecture Schema
Usually, a best practice is to keep the admin server away from managed servers.
Because, if a strong load happens and overloads a managed server, it will consume all the resources available
on the machine, including those needed for the admin server to be safe & running.
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Then [...]

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