Using multiple disks for a dbspace helps to distribute
I/O across dbspaces that contain several small tables.
A dbspace can include multiple chunks, and each chunk can represent
a different disk. The maximum size for a chunk is 4 terabytes. This
arrangement allows you to distribute data in a dbspace over multiple
disks. A dbspace distributed over
three disks shows
a dbspace distributed over three disks. Figure 1: A dbspace distributed over
three disks
Because you cannot use this type of distributed dbspace for parallel
database queries (PDQ), you should use the table-fragmentation techniques
described in Distribution schemes to
partition large, high-use tables across multiple dbspaces.