SNAX/HLS Configuration and Control Manual

Starting SNAX/HLS
Operating SNAX/HLS
5–8 104705 Tandem Computers Incorporated
MAX^POCB. Is the number of process opener control blocks (POCBs) allocated at
SNAX/HLS startup. Each application program that issues a system service OPEN
uses one POCB for each file it opens. Configure this parameter to reflect the total
number of openers required. This number is augmented to account for SPI openers.
The amount by which it is increased may change from release to release or from IPM
to IPM. The default value of MAX^POCB is 64.
RECEIVEDEPTH . Specifies the number of entries that will be reserved for incoming
messages on $RECEIVE. The number specified will be augmented to account for SPI
requesters and system messages. Thus, the value specified should account only for
application requests to SNAX/HLS. If omitted, the default value is twice the number
of openers permitted that is, twice the value specified for MAX^POCB or its default.
Legal values are in the range 0 to 2,000. Judicious use of this parameter can save
valuable real memory in the PFS. However, too small a value may cause incoming
traffic to be rejected, causing your application to fail. If a value other than the default
is to be used, first consult your Tandem analyst.
SSCPTEXTSIZE. Is the maximum unformatted message length that can be received on
the SSCP-LU flow. This value is meaningful only if SNAX/HLS has been configured
to receive SSCP-LU messages. Typically, this value depends upon the size of the USS
message sent from the host. If you omit this option, the value 4096 is used. The range
is 256 to 30,720.
SWAPVOL. Specifies the name of the disk used for swapping extended memory. The
specified disk must be local. The default is the same volume that is used to swap
data. The volume used to swap data defaults to the volume of the program that is
being run. It can be selected using the swap run-option of the TACL RUN command
TWOSTEP. Specifies the buffer size when two-step reads are used. If the maximum
amount of data that can legally be retrieved by SNAX/HLS from the SNALU interface
is greater than or equal to the value specified here, two-step reads are used.
Otherwise, one-step reads are used. If you omit this option, or specify the value zero,
two-step reads are never used. The range is 0 to 30,720.