DB2 V10.5 An Overview

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DB2 with BLU Acceleration

BLU Acceleration is one of the most significant pieces of technology that’s ever been delivered in DB2 and, we’d argue, in the database market in general. 

DB2 with BLU Acceleration delivers significant improvements in database compression and unparalleled performance improvements for analytic applications running on DB2.

DB2 pureScale

DB2 10.5 contains a number of enhancements to pureScale:DB2 pureScale technology is based on the “gold standard” DB2 for z/OS coupling facility (CF) and is available on both the Linux and AIX platforms.

This technology enables multiple DB2members to access the same database with full locking and logging integrity because the DB2 pureScale central caching facility (which is a software implementation of the CF—so we refer to it as the CF in this book)

Expression-Based Indexes

DB2 10.5 introduced the concept of expression-based indexes, which as its name suggests, allows you to define indexes on general expressions.

CREATE INDEX COMP ON EMPLOYEE (SAL+COMM)

Excluding NULL Keys from Indexes

DB2 10.5 in addition to expression-based indexes is the ability to exclude NULL keys from the indexes themselves. Quite simply, this new DB2 10.5 feature allows you to define indexes that ignore NULL keys

CREATE INDEX ONE ON ORDERS(ORD_NUM) EXCLUDING NULL KEYS

Extended Row Size

We can add data up to 32K CREATE TABLE

CUSTOMER(FIRST_NAME VARCHAR(32000),….

Better Online Space Reclamation for Insert Time Clustering Tables

A reorganization operation can be performed in place in an online manner. This method can take a fair amount of time to complete, due to the amount of data movement taking place; however, it’s important to note that this is by design: Online DB2 table reorganization is designed to make the table ultra-available during the operation.

DB2 Supports NOSQL

It seems that everywhere you turn, people talk about “NoSQL” databases and how they will ultimately replace traditional databases. In fact, many people believe that there is no more innovation in the relational world and that Big Data projects can only work with often creatively named “NoSQL” databases. 

DB2 10.5 is here to prove them wrong and help their applications scale and stay up and running! It is true that the flexibility associated with the NoSQL model is extremely well suited for certain kinds of applications, 

DB2 Pure XML

The DB2 pureXML technology, which is freely available in all DB2 editions, treats XML data as a tree of XML elements and attributes and stores it that way (with no fidelity loss), thereby enabling faster insertion and retrieval of this semistructured format.

Resources

www.ibm.com/certify  www.ibmdatamag.com/ www.ibm.com/developerworks/data/

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