EA-enabled table spaces and index spaces

You can enable partitioned table spaces for extended addressability (EA), a function of DFSMS. The term for table spaces and index spaces that are enabled for extended addressability is EA-enabled.

You must use EA-enabled table spaces or index spaces if you specify a maximum partition size (DSSIZE) that is larger than 4 GB in the CREATE TABLESPACE statement.

Partition-by-range table spaces with relative page numbers must be EA-enabled table spaces.

Both EA-enabled and non-EA-enabled partitioned table spaces can have only one table and up to 4096 partitions. The following table summarizes the differences.

Table 1. Differences between EA-enabled and non-EA-enabled table spaces
EA-enabled table spaces	Non-EA-enabled table spaces
Holds up to 4096 partitions with DSSIZE 64G	Holds up to 4096 partitions with DSSIZE 4G
Created with any valid value of DSSIZE	DSSIZE cannot exceed 4G
Data sets are managed by SMS	Data sets are managed by VSAM or SMS
Requires setup	No additional setup