Craig S. Mullins

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December 2004 / January 2005
 

 

 

 

                                     



zData Perspectives
by Craig S. Mullins  

 

The DB2 Utility Conundrum

Every DB2 customer has been, or will soon be, faced with a decision to make on their DB2 utilities. As of DB2 Version 7, IBM decoupled the core utility functionality from the base DB2 engine and is charging customers extra if they choose to use IBM’s utilities. In all past releases of DB2, core utility functionality came free with the DB2 base product. This is causing confusion and angst for many mainframe DB2 customers.

First of all, let’s be clear on our terms. What is a utility versus other popular terms such as “tool” and “solution.” A utility is a single purpose batch program for moving and/or verifying database pages; examples include LOAD, UNLOAD, REORG, CHECK, COPY, and RECOVER. A database tool is a multi-functioned program designed to simplify database monitoring, management, and/or administration tasks. A solution is a synergistic group of tools and utilities designed to work together to address a customer’s business issue.

Now, given those definitions, let’s examine the details of this DB2 utility conundrum. IBM has invested a lot of time and development into the DB2 utilities over the past few releases of DB2 – and IBM’s utilities work better and faster than they used to. Why did this happen?

Independent software vendors like BMC Software, Computer Associates, and CDB Software brought DB2 utilities to market that were easier to use, faster, and delivered higher availability to DB2 applications. Actually, this is still true. Driven by this competition – and the frustration of DB2 users – IBM was forced to improve its utility functionality.

In order to recoup its investment, though, IBM could no longer “give away” free utilities to its customers. So, now you have to buy them. Of course, currently IBM only offers one choice to its customers: buy all of the DB2 utilities or none of them. So, DB2 shops have to decide whether they will buy and run IBM’s utilities, or use a competing set of utilities. The ISVs offer more flexibility, though. For example, you could buy your REORG and UNLOAD from BMC, your CHECK and COPY from Computer Associates, your LOAD from CDB, etc. It is not an all-or-nothing proposition. But you will need to make sure you have the entire suite of utility functionality covered. At a minimum you will need products:

  • to backup your data
  • to recover and restore your backups
  • to reorganize inefficient database objects
  • to collect database object statistics
  • to manipulate statistics in the DB2 Catalog
  • to load and unload data
  • to check for data integrity problems

 

These products may, or may not have the same or similar names as the IBM utilities that perform the same tasks. Choosing the proper utilities with the required functionality can be difficult though. The functionality of the IBM and ISV utilities is not 100 percent exact. Many of the third party offerings still provide more functionality at higher speeds than the IBM offerings. And in some cases, the IBM utilities perform tasks that the ISV utilities do not.  

Even more troublesome is that many shops bought third party utilities from ISVs with the comfort level of having the IBM utilities as a back up in case problems were encountered. Additionally, most shops bought only a few of the third party utilities, and not a full set. Now those shops may have to purchase additional ISV utilities to get the same functionality they had before DB2 V7. Or they may choose to buy both the IBM utility suite and the same third party utilities to maintain a sort of status quo.

The bottom line is that DB2 customers have some decisions to make — do they buy IBM or ISV utilities? Or perhaps both? With the end of service date looming for Version 6 (June 2005), the next six to nine months will see those in the DB2 community who have not yet upgraded moving to Version 7 – and making the utility decision. It is confusing. But each DBA staff must be able to understand the issues and options available. Now is the time to examine the functionality, speed, and ease-of-use of each set of utilities to make sure you are using the utilities that best match your needs.

Of course, price will be a factor for most shops, too. But price should be examined as total cost of ownership (TCO), not just initial cost of the utilities. Measuring TCO can be difficult, but it should include things like CPU usage, time spent creating utility jobs, ease of use features like restartability, job generation, etc., as well as the initial cost.

And try to keep a smile on your face even if it is difficult to understand why you have to pay for something that you previously got for free.

 

 

From zJournal, December 2004 / January 2005
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2004, 2005 Craig S. Mullins,  All rights reserved.

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