OpenVMS Cluster Systems - OpenVMS Systems - HP

Cluster System Parameters
A.1 Values for Alpha and VAX Computers
Table A–2 (Cont.) Cluster System Parameters Reserved for OpenVMS Use Only
Parameter Description
PASANITY PASANITY controls whether the CI and DSSI port sanity timers are enabled
to permit remote systems to detect a system that has been hung at IPL 8 or
higher for 100 seconds. It also controls whether virtual circuit checking gets
enabled on the local system. The TIMVCFAIL parameter controls the time
(1–99 seconds).
PASANITY is normally set to 1 and should be set to 0 only if you are
debugging with XDELTA or planning to halt the CPU for periods of 100
seconds or more.
PASANITY is only semidynamic. A new value of PASANITY takes effect on
the next CI or DSSI port reinitialization.
If CI or DSSI devices are not configured on your system, this parameter is
ignored.
PASTDGBUF The number of datagram receive buffers to queue initially for each CI or
DSSI port driver’s configuration poller; the initial value is expanded during
system operation, if needed.
If no CI or DSSI devices are configured on your system, this parameter is
ignored.
PASTIMOUT The basic interval at which the CI port driver wakes up to perform timebased
bookkeeping operations. It is also the period after which a timeout
will be declared if no response to a start handshake datagram has been
received.
If no CI or DSSI device is configured on your system, this parameter is
ignored.
PRCPOLINTERVAL Specifies, in seconds, the polling interval used to look for SCS applications,
such as the connection manager and MSCP disks, on other computers. Each
computer is polled, at most, once each interval.
This parameter trades polling overhead against quick recognition of new
computers or servers as they appear.
SCSMAXMSG The maximum number of bytes of system application data in one sequenced
message. The amount of physical memory consumed by one message is
SCSMAXMSG plus the overhead for buffer management.
If an SCS port is not configured on your system, this parameter is ignored.
SCSMAXDG Specifies the maximum number of bytes of application data in one datagram.
If an SCS port is not configured on your system, this parameter is ignored.
SCSFLOWCUSH Specifies the lower limit for receive buffers at which point SCS starts to
notify the remote SCS of new receive buffers. For each connection, SCS
tracks the number of receive buffers available. SCS communicates this
number to the SCS at the remote end of the connection. However, SCS does
not need to do this for each new receive buffer added. Instead, SCS notifies
the remote SCS of new receive buffers if the number of receive buffers falls
as low as the SCSFLOWCUSH value.
If an SCS port is not configured on your system, this parameter is ignored.
A–14 Cluster System Parameters