IBM Class Author book content - IBM Learner Portal
IBM Class Author book content - IBM Learner Portal
IBM Class Author book content - IBM Learner Portal
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Student Note<strong>book</strong><br />
DB2 for i enablers for DW<br />
• DB2 Engine<br />
Figure 1-7. DB2 for i enablers for DW AT911.0<br />
Notes:<br />
– SQL Query Engine (SQE)<br />
• 5x Query Performance Improvement<br />
• Real time statistics<br />
• Autonomic Indexes<br />
• Star Schema Awareness<br />
– Database Parallelism<br />
– Materialized Query Tables<br />
– Encoded Vector Indexing<br />
– Remote Journaling (Trickle Feed)<br />
© Copyright <strong>IBM</strong> Corporation 2010<br />
• Management<br />
– On Demand Performance Center<br />
• Business Intelligence<br />
– DB2 Web Query<br />
*See detailed certified benchmark results at http://www.sap.com/solutions/benchmark/bimxl.epx<br />
<strong>IBM</strong> has been investing heavily in DB2 for i query optimization for many years now, going<br />
way back to 1995 and V3R1 when we first introduced DB2 symmetric multi-processing<br />
(SMP). More recently, in V5R3, <strong>IBM</strong> introduced a totally re-architected query engine called<br />
SQE (SQL Query Engine). This component of DB2 is the brains behind processing queries<br />
and can improve query performance up to 5 times (as proven by internal <strong>IBM</strong> performance<br />
test cases). Actual performance could be much better than that. Products like Query/400<br />
cannot leverage this technology now and for the foreseeable future. SQE can also use<br />
many more techniques to process queries, such as a new real-time statistics engine<br />
(again, part of DB2), and ability to process a popular data model used in data marts and<br />
data warehouses called a star schema. Autonomic Indexes are another DB2 “self<br />
managing, self adjusting” technique where the database can actually create an index<br />
automatically if it thinks that is a better way to process a query, and then keep that index<br />
around for other users and queries to leverage.<br />
A key consideration in any database platform in support of BI applications is its ability to<br />
scale while maintaining acceptable performance. DB2 for i offers a variety of techniques to<br />
address scalability/performance. Parallel database operations through the Symmetric<br />
1-8 DB2 Web Query for <strong>IBM</strong> i © Copyright <strong>IBM</strong> Corp. 2010<br />
Course materials may not be reproduced in whole or in part<br />
without the prior written permission of <strong>IBM</strong>.
Change language