RSCT APAR Affecting TSAMP

Some of my clients, instead of engaging me for day-to-day support, engage me for expert assistance only when it all really hits the fan. This issue occurred for one of those clients, who had other support performing the HADR failovers while the Linux kernel was upgraded. The version of RedHat did not change, but the kernel did.

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High Availability Options for Db2 LUW

Why Should a Database be Highly Available?

It is significantly easier to implement high availability at other levels than it is at the database level. Often the database server is one of the more powerful servers in an environment, and without some fancy footwork there can be only one live copy of data. Ignoring high availability at the database level due to expense can be a bankruptcy-inducing choice for an organization. Just imagine what would happen if your databases suddenly did not exist. Not only would your company be unable to perform daily business, but the data lost could actually drive a company out of business.

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DB2 Upgrade Detail: Upgrading Event Monitor Tables

I am a huge fan of always running a locking event monitor, and also using other event monitors when appropriate. This means that most databases I support have at least one event monitor, whether it is active or not. With some version changes, the structure of tables that event monitors write to are changed. This means that as you upgrade DB2, you must also run a command to upgrade your event monitors.

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Starting a DB2 Instance in a Quiesced State

Some applications are really good at continually trying to re-establish connections to a database. This can be useful when I want to quickly bounce the database and have the app reconnect without also having to bounce the app. It is problematic when I need DB2 to be down and stay down, but still allow me to work with it. This can be needed to kick off a backup or to keep things down during an upgrade. When upgrading to DB2 8.1, there was actually a point in time where, if an application connected, the entire upgrade was hosed.

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Problem with DB2 Federation to an Informix Source when Applying a Fixpack

I can’t say that I work with federation on a daily basis. I have, however, set up federation for an Oracle data source from top to bottom, and support at least one system on a daily basis that uses federation to access Oracle, Informix, and DB2 for AS/400. This database also happens to be a BLU database, and as such, we want to stay really current on the fix pack. Currently with BLU being so new, there can be some drastic differences with just a fix pack.

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TSAMP Issue on Fixpack

As always, when I feel pain, I share the knowledge that pain gained me with my blog readers. Man, that was a painful fixpack. I was upgrading an AIX HADR pair from 10.5 fixpack 3 to 10.5 fixpack 5. My experience has generally been that TSA is painful when patching DB2.

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