2.1 Reorganization considerations2.1.1 Reorganizing because of lots of CI/CA splits2.1.2 Reorganizing because of loss of useful space in data CA2.1.3 DB2 table space reorganization2.2 Sharing VSAM data sets2.2.1 Integrity2.2.2 Sharing VSAM data sets2.2.3 Write and read integrity2.2.4 VSAM sharing mechanisms2.2.5 Sharing data in a single VSAM control block structure2.2.6 Sharing data with many VSAM control block structures2.2.7 General share options considerations2.2.8 Protecting VSAM data set through DISP parameter2.3 Extended format2.3.1 Extended format characteristics2.3.2 Creating an extended format data set2.4 Extended addressability (EA)2.5 Catalog Search Interface2.5.1 CSI highlights2.5.2 DITTO/ESA2.6 Major sources of VSAM processing options2.6.1 Access method Control Block (ACB)2.6.2 DD statement keywords2.6.3 Catalog BCS and VVDS entries2.6.4 SMS constructs2.7 Media Manager, Open, Close, EOV in VSAM2.8 VSAM and 64 bits in real storage2.9 Special considerations for COBOL users and SMB2.9.1 Positioning error2.9.2 Waits and hangs2.9.3 ISAM data set programs