WPAR : Introduction
meyawi 270002D6NU Visits (3543)
This my first post and I'm going to blog about WPAR technology
What is a WPAR ? WPAR = Workload PARtition.
It is a software virt
This technology had been introduced since AIX 6.1 release and there are several kinds of WPAR (application, system...).
We could establish an "analogy" of virtualization technologies between physical server LPAR on one hand, and AIX WPAR in the other hand, which could involve next configuration example : Physical Server > LPAR > AIX > WPAR.
Backup / Restore
• Global environment Mksysb (–N option to include inactive WPAR)
• Specific command : savewpar
– Like mksysb command
– Exclude : /etc
• List files in a backup file : lssavewpar
• Restore : restwpar
• Definition and Backup from a NIM server • Ability to clone WPAR (spec file)
• Resource use optimisation (WLM)
• Fast Depl
• Isolation et security
• Disaster/Failure Recovery (checkpoint, Live Application Mobility, job)
• Extended AIX 5.2 et 5.3 support, included in AIX 7.1 support, for Versioned WPAR
In my opinion, WPAR could be a very interesting and useful technology in some cases. For example, where multiple small isolated environment provisioning is needed. It could also be helpful for testing purpose without risking system corruption.
The main asset is without a doubt the ability to run AIX 5.2 (indeed 5.3) in a WPAR hosted by an AIX 7.1, in order to benefit POWER7 cores computing power and AIX 7.1 software maintenance. As a reminder, AIX 5.2 is no more supported, and AIX 5.3 end of support is planned for April 2012, so in both cases extended support is needed with an additional cost which could be balanced with the cost of a new POWER7 server...
In a future post, I will make a deep dive in WPAR creation and use.