IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 26

Once the application has been deployed into IASPs, the data mirroring between systems is inherently self-managing. As important as the solution’s management aspect is, let’s not lose sight of the fact that this product is designed for role-swap operations. Simple commands perform the switching operations for you and, as one of my colleagues said while giving a demonstration, “This is going to be boring, but when it comes HA, boring is good.” He proceeded to demonstrate a failover operation that took about five minutes. I had to chuckle when I heard about another colleague’s demo at a customer event in the Asia-Pacific region. An audience member commented that it was a good presentation, but he wanted to see the real thing! The demo actually runs on a cluster in Rochester, Minn. a recovery point objective of zero. However, no improvement is achieved in the recovery time objective. Any kind of switchover event requires a system IPL. When the data is deployed via the IASP, the switchover is called a vary-on of that storage pool and the recovery time objective is dramatically improved. As previously mentioned, I’m talking about tens of minutes or less. A second key benefit is that once the PowerHA solution is deployed, there’s very little for you to do regarding the management and status of the resilient data between the primary and secondary nodes in the cluster. Once the application has been deployed into IASPs, the data mirroring between systems is inherently self-managing. You don’t concern yourself with the state of your resilient data in a disk subsystem deployed via mirroring or RAID 5, and this is the same basic idea. When using synchronous mirroring such as Metro Mirror or geographic mirroring, the data mirroring is synchronous to the application state just as with mirroring disk arrays in a single-system configuration. The practical benefit is that your IASP data is always ready to Key Benefits Several key benefits are associated with the PowerHA for i solution. The first basic benefit is that the resilient data is deployed into IASPs attached to another system, which may take ownership of that IASP without doing a system IPL. Think about a two-node topology. Let’s make it two Power 570s and two DS8000s with Metro Mirror replicating the data between the systems. With Metro Mirror and full system replication, the data is highly resilient with Figure 3 IBM Systems Storage & PowerHA Cluster With i 6.1 Copy Services Tool Kit Extension Figure 4 Resources IBM PowerHA www.ibm.com/systems/power/software/availability IBM Redbooks publication SG247405 “Implementing PowerHA for IBM i” www.redbooks.ibm.com/abstracts/sg247405.html?open IBM Systems Storage & PowerHA Cluster With i 6.1 Copy Services Tool Kit Extension 26 MARCH 2009 ibmsystemsmag.com/ibmi
http://www.ibm.com/systems/power/software/availability http://www.redbooks.ibm.com/abstracts/sg247405.html?open http://www.ibmsystemsmag.com/ibmi

IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009

Table of Contents for the Digital Edition of IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009

IBM Systems Magazine, Power Systems — IBM i digital edition, March 2009
Table of Contents
Editor's Desk
Trends:  IBM Unified Communications Solutions With Nortel Can Move You Ahead
Case Study:  Pacific Seafood Saves Thousands by Moving an Electronic Document-Distribution System
Cover Story:  PowerHA changes the IBM i HA and DR Game
Feature:  IBM Uses Cross-Site Mirroring to Protect Your Business-Critical Systems
Feature:  Estimating Energy Requirements for IBM Power Systems
Administrator:  Intrusion Detection and Prevention on IBM i
Tips & Techniques: HASM Simplifies HA Setup and Management
IBM i INTERFACE
Product News
Advertiser Index
ENGPGM:  IBMer Barbara Morris Creates Harmony With Strings and Code
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - IBM Systems Magazine, Power Systems — IBM i digital edition, March 2009
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Cover2
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 1
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Table of Contents
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 3
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 4
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 5
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 6
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 7
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Editor's Desk
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 9
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Trends:  IBM Unified Communications Solutions With Nortel Can Move You Ahead
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 11
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 12
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 13
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 14
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 15
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Case Study:  Pacific Seafood Saves Thousands by Moving an Electronic Document-Distribution System
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 17
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 18
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 19
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 20
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 21
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Cover Story:  PowerHA changes the IBM i HA and DR Game
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 23
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 24
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 25
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 26
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 27
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Feature:  IBM Uses Cross-Site Mirroring to Protect Your Business-Critical Systems
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 29
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 30
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 31
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 32
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 33
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 34
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 35
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Feature:  Estimating Energy Requirements for IBM Power Systems
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 37
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 38
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 39
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 40
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 41
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Administrator:  Intrusion Detection and Prevention on IBM i
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 43
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 44
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 45
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Tips & Techniques: HASM Simplifies HA Setup and Management
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 47
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 48
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 49
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 50
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - IBM i INTERFACE
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Product News
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 53
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - 54
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Advertiser Index
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - ENGPGM:  IBMer Barbara Morris Creates Harmony With Strings and Code
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Cover3
IBM Systems Magazine, Power Systems - IBM i digital edition, March 2009 - Cover4
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