WebSphere Application Server v8 on the blog


WebSphere application server v8 [WAS v8] is the new version in the IBM application server offering. There have been many changes, updates and new features in this version compared to v7 and the widely used v6.1

So, I am going to post a series of articles/tutorials on WebSphere Application Server v8 which will help you to understand and transition smoothly to v8 from either WAS v7 or WAS v6.1. The basic idea is to provide an overview of all the new features of WAS v8. This series is named as “WebSphere Application Server v8 Primer” and will be tagged/filed under “WAS v8 Primer” category of this blog.

List of tutorials

  1. What’s New in WAS v8
  2. Installation Manager
  3. Installing WAS v8
  4. Customization Tool Box 8.0
  5. Auto-deployment/hot deployment
  6. Deployment using property files
  7. High Performance Extensible Logging [HPEL]
  8. Generating java and heap dumps from console
  9. Changes in security
  10. Disabling WMQ functionality
  11. .. and more

Tip: All the tutorials will be provided as PDF files which can be imported to your Google account using google docs. Alternatively you can download them also.

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New Feature : Import posts to your google docs


Hello All

today we have two updates for you

  1. From now on all the articles published as PDFs can be downloaded to your google docs account.
  2. we will be posting a new series of articles on “Transition to WebSphere v8”, which covers WebSphere Application Server v8 new features and administration.

Leave your suggestions, in the comments section below

steps to download or importing to google docs:

  • click on the arrow mark to open it in a new window .
  • Then go to file –> download or save in google docs

 

Cheers

Val

WebSphere Application Server Questions (part-6)


1) What is the default user registry, if you enable Global Security at the time of installation
Its federated repositories…. actually it is a file

2) Which commands require username/password , if you enable admin security
all stop* , syncNode, addNode(?)

3) When can you enable global security?
– while installing
– After installation also

4) Does enabling admin security needs j2ee security to be enabled?
No

5) Does enabling admin security enables j2ee security?
yes

6) What is the most important step to do, if you change your user repository.
recycle all the JVMs. otherwise the key tokens will not be updated for the new repo

7) who can change admin security settings?
Adminstrator

8) what is the tool supplied by IBM for SSL management in Websphere
ikeyman

9) How do you change the cell wide SSL?

10) how do you replace the default plugin-key.kdb file with new kdb file?

11) can we use diffrent SSL for nodes and plugin ?
Yes

WebSphere Application Server Questions [part-5]


1.WHAT IS TRACING?
Tracing is when you go through an entire program and record the value of variables and the output. You trace a program when you want to find out what actually went wrong

2.WHERE TO GIVE APPLICATION PRIORITY WHILE STARTING SERVER?
it will be under Enterprise applications ->app name -> startup behaviour ->Startup order   in the admin console

3.HOW TO MOVE CODE DEV ENVIRONMENT TO TESTING ENVIRONMENT?
I’m sure what they mean by code here. I think, incase of applications, export them from in DEC and deploy in TEST.

4.WHAT IS SSL?WHEN IT ENCRYPT & DECRYPT THE DATA?
SSL are digital signed certificates. user for meesage/communication integrity and confidentiality.  Generally encrypt at Sender side and decrypt at receiver side

5.WHAT IS INCIDENT MANAGEMENT?
It is part of ITIL process….. simple explanation is, when there is a problem in ur WAS environment, which procedure do you follow.

6.WHEN APPLICATION IS DOWN WHAT U WILL DO?
First look at the logs for errors. If you find the error, save the logs and start ur application. Then start trouble shoot.
If no error found, run a trace and look for FFDC etc..

7.I HAVE 16GB RAM,WHAT IS THE MINIMUM & MAXIMUM HEAPSIZE ?
No relation. Heap settings should be made depends on application

8.HOW TO OPEN ADMIN CONSOLE IN AIX/UNIX & WHAT IS THE DEFAULT FILE SYSTEM OF AIX?
admin console can be viewed from remote machine which has a browser, if not behind firewall.

9.WHAT IS FILE DESCRIPTORS IN AIX?
A file descriptor is a handle created by a process when a file is opened. There is a limit to the amount of file descriptors per process.If the file descriptor limit is exceeded for a process, you may see the following errors:”Too Many Open Files”

10.HOW TO RESOLVE PORT CONFLICTS IN PRODUCTION ENVIRONMENT?
check why there is port conflict
run updateports script in WAS

WebSphere Application Server Questions [part-4]


how do you create a cluster

go to servers -> clusters-> new ->give cluster_name->define first member->define other members->finish

how do you add a new cluster member
go to servers -> clusters->cluster_name ->cluster members ->new ->give name/node/others->apply->ok->save

one of the cluster member (jvm) is having issues. To troubleshoot the issue, you decided to take it out of the cluster. How do you do that?
Make its runtime weight to 0

In a complex environment, there are 10 machines. Machine A is having 8GB RAM and machine B having 2GB of RAM. The administrator decided to send twice as many request as machineB to machineA. How can he achive it?
give machineA twice the weight as machineB

After making some changes on a cluster, it is required to recycle/restart all the cluster JVMs. The lead admin told you to make sure that there should not be any downtime during this recycle. Which option do you use to achieve it?
Ripplestart

A large application which has 5web modules has been deployed on to a cluster. After some months, the developer asked you to update on of the 5web modules. How do you do it?
Rollout

can you change the cluster name, once it was created

No

WebSphere Application Server Questions [part-3]


1. what is the difference b/n managed and unmanaged node
managed node has a nodeagent

2. Which is the tool provided by IBM for key management in IHS/WAS
ikeyman

3. what is a virtual host ? what are the default virtual hosts in WAS
admin_host, proxy_host, default_host

4. where do you find the port numbers of a JVM (config file name)

5. which component initilizes the sync process in a cell
Node

6. you have edited some config files at JVM level, and the JVM was restarted after some time. What will happen to the changes you done to JVM config files
changes will be discarded as the sync is one way (from DMGR)

7. How do you administrate a webserver from websphere admin console
create a webserver definition and add it as managed/unmanaged node

8. what is the name of the plug-in configuration file
plugin-cfg.xml

9. You have added a new virtual host to the WAS, what should you do for the webserver to be aware of this addition
generate and propagate the plugin

10. describe the steps to configure SSL b/n WAS and IHS

11. how do you take backup of all the config files of a profile
run backupconfig from profile bin

12. how do you apply a fixpack
– Stop all the JVM/Node/DMGR on which you are going to apply fixpack
– first check and update the update installer
– Place the .pak files in maintenance folder of updateinstaller directory
– create the response files
– run ./update.sh -silent -options”path-to-responsefile”
– check the versioninfo fron the WAS bin directory

13. How do you generate a cell level plugin configuration file
in console…. check under administration section

14. If nodeagent is stopped, can you perform the sync
in adminconsole Answer is No
and if we r doing syncnode by command mode then
Nodeagent should be stopped..

15. How do you federate a node to cell
addnode command