Admin Alert: Four Ways To Move An IBM i Partition, Part 2
January 15, 2014 Joe Hertvik
In December, I began discussing four different approaches for moving an IBM i partition from an existing machine to a new location and the different tasks needed for each technique. I talked about using traditional system back-up and restore migration techniques last issue. This issue, I’ll focus on using high availability (HA) software to migrate a partition.
Four Ways To Move An IBM i
To review, there are four techniques for moving an IBM i partition to a different machine:
Last issue, I covered the traditional techniques of using a full system backup and a system restore for partition migration (options 1 and 2). This week, I’ll look at using vendor HA software to migrate partitions to a different machine (option 3). Next issue, I’ll look at using SAN technology to migrate a partition (option 4).
Technique #3: Replicate to a different location using HA software.
Using this technique, you contract with a HA vendor to use their software to move your partition. Many HA vendors are now offering this as an alternative migration technique in lieu of traditional backup and restore migrations. An HA migration isn’t technically a move in the traditional sense. The gist is that you use HA technology to reduce the downtime needed to bring up a new partition.
Note: To keep the replication roles clear, let’s use HA terminology and refer to the existing partition that’s being migrated as the source system and the new partition it’s migrating to as the target system.
Here are the steps you might encounter in using HA technology to migrate an IBM i partition to a new machine.
The big plus in using HA software to migrate a partition is time. When you’re ready to activate the new partition, the process is a relatively quick switch over rather than performing a full system rebuild, which may require you to take down your production machine for many hours.
In my shop, we’re in the middle of using Vision Solutions‘ MIMIX Availability product to migrate two partitions to other machines. While this is an in-process project, here are some of the downsides I see to using HA software for moving a partition.
Keep in mind that HA migration is a different animal from standard partition migration and you have to make different allowances when planning and executing a migration. If you’re using HA software for partition migration, be thorough and make sure everything is covered for a smooth switchover.
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Joe Hertvik is the owner of Hertvik Business Services, a service company that provides written marketing content and presentation services for the computer industry, including white papers, case studies, and other marketing material. Email Joe for a free quote for any upcoming projects. He also runs a data center for two companies outside Chicago. Joe is a contributing editor for IT Jungle and has written the Admin Alert column since 2002.