TS/MP System Management Manual (G06.24+, H06.03+)

Configuring Objects in a PATHMON Environment
NonStop TS/MP System Management Manual—541819-001
3-32
Steps to Optimum Link Configuration
where the constant is a safety factor, MAXSERVERS is the result of Step 6, and no.
of TCPs is the total number of TCPs from Step 2. The result, no. of links
required by TCPs, is the total potential TCP demand for links to the server class.
This example uses the value 1 as the constant:
2 x 60 TCPs = 120 links required by the TCPs
If your application environment is designed for a homogeneous distribution of
transactions across Pathsend requesters or TCPs, you could set the value of
constant at 1. However, to account for possible processor failure, consider using
this formula:
1 + ______1___________
no. of CPUs - 1
If your application is designed for uneven distribution of transactions across Pathsend
requesters or TCPs, increase the value of constant to support a potential increase in
requests to a given link manager.
The result of multiplying the constant by (MAXSERVERS/no. of CPUs or TCPs) is
rounded up to the next whole integer to avoid the possibility of LINKMON processes or
TCPs attempting to share fractions of links.
Step 8 Calculate the MAXLINKS Attribute
This step produces values for the key server class attribute MAXLINKS. Together,
MAXLINKS and MAXSERVERS (from Step 4) provide for optimum link configuration
and help maximize server class performance. In this formula, you insert values for two
variables—no. of links required and MAXSERVERS—based on the results of
previous steps, and then resolve the equation to arrive at a value for the third variable,
MAXLINKS. Following is the formula:
where no. of links required is the number of links required by the LINKMON
processes or TCPs (from Step 7) and MAXSERVERS is the requirement for total
active links (from Step 6).
Resolve the equation to get MAXLINKS.
In this example, the value for no. of links required is 120, from the TCP
example in Step 7. MAXSERVERS is also 120, the required number of active links.
1 x MAXSERVERS=120 = 2
60 TCPs
MAXLINKS = no. of links required -----------------> from formula in Step 7
MAXSERVERS -----------------> from formula in Step 6
2 = 120 TCP links required -----------------> from TCP example in Step 7
MAXSERVERS=120 -----------------> from example in Step 6