Expand Configuration and Management Manual (G06.24+)

Subsystem Description
Expand Configuration and Management Manual—523347-008
18-46
Message Buffering
Message Buffering
The previous subsection showed that Expand line-handler processes buffer incoming
and outgoing requests so that data can be transferred between processes on different
nodes. This subsection describes in greater detail the data space allocated to the
Expand line-handler process for message transfer and how you can affect the size of
that buffer space. It is necessary to understand this information before you can
effectively configure or troubleshoot an Expand network.
This subsection describes the following topics:
•
Global Variables on page 18-47
•
Stack on page 18-47
•
Control Blocks on page 18-47
•
Line Buffer on page 18-47
•
Buffer Pool on page 18-47
•
Shared Memory Area for QIO on page 18-48
Figure 18-15 illustrates the Expand line-handler process data space.
Note. This subsection refers to modifiers that allow you to control message buffering. For
detailed information about these modifiers, refer to Section 17, Expand Modifiers
.
Figure 18-15. Expand Line-Handler Process Data Space
023CDT .CDD
Shared Memory
Area for QIO
Global
Variables
Stacks
Control
Blocks
OOS
Buffer
Line
Buffer
Buffer
Pool
Pool Space