IBM 000-8697 Instrukcja Użytkownika Pobierz pdf (Strona 183)

System Architecture 2-89

Structure of a Regular Dbspace

After disk space initialization, you can add new dbspaces. When you create

a dbspace, youassign at least onechunk (either raw orcooked disk space) to

the dbspace. This is the initial, primary chunk. Figure 2-13 illustrates the

structure of the initial chunk of a regular (nonroot) dbspace.

When the dbspace is ﬁrst created, it contains the following structures:

■ Tworeservedpages(duplicates of theﬁrst two reservedpages in the

root dbspace, page 2-95)

■ The ﬁrst chunk free-list page in the chunk (page 2-103)

■ The tblspace tblspace for this dbspace (page 2-104)

■ Unused pages

Structures within

theinitialchunk ofa

regular dbspace,

after the dbspace is

Chunk free-list page

Tblspace tblspace

(initial chunk)

Unused pages

IBM 000-8697 Instrukcja Użytkownika Strona 183