IBM 000-8697 User Manual
System Architecture
2-89
Structure of a Regular Dbspace
Structure of a Regular Dbspace
After disk space initialization, you can add new dbspaces. When you create
a dbspace, you assign at least one chunk (either raw or cooked disk space) to
the dbspace. This is the initial, primary chunk.
a dbspace, you assign at least one chunk (either raw or cooked disk space) to
the dbspace. This is the initial, primary chunk.
structure of the initial chunk of a regular (nonroot) dbspace.
When the dbspace is first created, it contains the following structures:
■
Two reserved pages (duplicates of the first two reserved pages in the
root dbspace,
root dbspace,
■
The first chunk free-list page in the chunk (
)
■
The tblspace tblspace for this dbspace (
■
Unused pages
Figure 2-13
Structures within
the initial chunk of a
regular dbspace,
after the dbspace is
created
Reserved
pages
Chunk free-list page
Tblspace tblspace
Dbspace
(initial chunk)
(initial chunk)
Unused pages