This topic covers the following subtopics.
If you use BDAM, be aware of the following limitations:
- Keyed blocks use hardware keys, which are less efficient than
VSAM keys.
- BDAM does not support extended format data sets.
- The use of relative track addressing or actual device addresses
easily can lead to program logic that is dependent on characteristics
that are unique to certain device types.
- Updating R0 can be inefficient.
- Load mode does not support 31-bit addressing mode.
VSAM does not have any of these limitations.