October 2006
Intermediate to advanced
160 pages
4h 9m
English
book
DB2 for z/OS: Data Sharing in a Nutshell
by Paolo Bruni, Mark Anders, KyengDong Park, Mark Rader, Judy Ruby-Brown
Content preview from DB2 for z/OS: Data Sharing in a Nutshell
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Chapter 2. Data sharing architecture 19
recognizes that inter-DB2 read/write interest exists, it initiates the necessary
locking and buffer management processes. Applications do not have to be
aware that inter-DB2 read/write interest exists.
Minimal and acceptable CPU overhead if inter-DB2 R/W interest exists:
Establishing a data sharing group requires some overhead to establish global
locking and buffer coherency controls. This overhead is minimized by using
high speed access to structures in the CFs and by communicating primarily
with the CF structures. Message traffic between DB2 members is used only to
resolve contention situations.
Near-linear scalability when adding the third through
n-th nodes:
The primary overhead for managing global ...
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