Root addressable part

The root addressable part is divided into units-of-work (UOW), which are the basic elements of space allocation.

A UOW consists of a user-specified number of CIs located physically contiguous.

Each UOW in the root addressable part is further divided into a base section and an overflow section. The base section contains CIs of a UOW that are addressed by the randomizing module, whereas the overflow section of the UOW is used as a logical extension of a CI within that UOW.

Root and direct dependent segments are stored in the base section. Both can be stored in the overflow section if the base section is full.