DB2 9 & 10 for z/OS Overview

Migration Planning WorkshopTable APPEND Option• Balancing qualities of:– Storing the data quickly at the cost of space & certain queries– More effective use of space at the cost of searching for space• CREATE / ALTER Table APPEND option:– Maximizes performance for “INSERT at end”– Avoids overhead of attempting to preserve clustering sequence– REORG after bulk insert to establish clustering• Useful for:speed– Cases where cluster is not important– Large batch INSERTs following by a REORGSpacereuse116© 2011 IBM Corporation