Live Partition Mobility: Feel free to move your AIX partitions!


I helped a friend move his belongings into a new house last weekend. We had a group of friends, and I remember the difficulty we had in choosing the best weekend to get together. Everyone had an excuse not to come, from responsibilities to children, to a family celebration, to vacation and various other reasons. We were far from flexible and elastic.

This type of inflexibility is a common problem in IT infrastructure as well.

Storage Warehouse

The number of virtual machines is increasing in each physical server, so it becomes very difficult to completely stop a machine. Indeed, each virtual environment is often a service or a very specific project in a company, and it’s a big challenge to get numerous departments or IT services to stop, just as it was difficult to get many people together at the same time to help my friend move.

Particularly in Unix hosting in critical environments, you must obtain the agreement of all projects before stopping the machine. Choosing the hour to stop it often requires lengthy negotiations, and in severe cases this can lead to a deadlock.

In the IBM Smarter Computing approach there is a simple device to facilitate the work of stopping a physical server, though people often don’t know about this feature and how it works. It is called Live Partition Mobility (LPM). LPM best practices and rules are described here: IBM PowerVM Live Partition Mobility: An IBM Redbooks publication.

The interest of LPM is to move “on the fly” any activity running AIX in a partition. This concept is particularly useful when using partitions that include critical databases. The user will not detect a change of server (just a “freeze” of one or two seconds). Here is a video example:

This device is used in two major cases:

  • Moving servers between different rooms or different sites (like my friend who moved into his new house)
    • In this case, just plan ahead, leaving enough space on the new machine to move the production load.
  • A rise of critical firmware
    • In this case it may be advantageous to shift the burden of production onto another machine and test environment before putting it on the production server up to date.
    • This way backtracking is possible.

We are at the beginning of this flexibility of moving loads “on the fly.” This capability is a key approach in cloud computing.

LPM already lifts many limitations (for example moving from blades environments to other types of machines). The new machines like IBM PureSystems incorporate these features. No doubt, important progress will be made in the near future in this arena.

Philippe Lamarche is currently an IBM Infrastructure Architect after a long career in the hardware division (STG), working with French industry customers and System Integrators. He has spent over 30 years at IBM in different technical positions. He is a Certified IT Specialist and Infrastructure Architect at expert level. He is involved in current key French cloud or PureFlex projects, especially in the industry area. Philippe runs Smarter Computing workshops in France and has participated in two Power AIX-related Redbooks projects. You can reach him on Twitter: @philip7787.

Redbooks Thought Leader

Smarter Computing Analyst Paper - HurwitzTo effectively compete in today’s changing world, it is essential that companies leverage innovative technology to differentiate from competitors. Learn how you can do that and more in the Smarter Computing Analyst Paper from Hurwitz and Associates.

Subscribe to the Smarter Computing Blog

Recent Posts

Opening up new options for hybrid cloud

Setareh Mehrabanzad

The creation of hybrid clouds has become a hot topic among IT organizations. Companies have come to realize that the best systems almost always include both a public cloud and a private cloud, but that is often fraught with technical difficulties. IBM is unveiling new capabilities to bring down barriers and allow IT departments to choose the best solution, regardless of platform.

Continue reading

VersaStack expands to more applications and workloads

Eric Herzog

Today, IT departments are caught between two conflicting forces: huge demand for new applications and flat IT budgets. VersaStack can efficiently reconcile the conflicting forces of application and workload demand and cost, while enabling more business value and expansion. IT departments will transform from cost burdens into enablers of innovation and business growth.

Continue reading

Leave a Reply

Your email address will not be published. Required fields are marked *

* Copy This Password *

* Type Or Paste Password Here *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>