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44 ParaStation5 Administrator's Guide
rdpMaxRetrans number
Set the maximum number of retransmissions within the RDP facility. If more than this number of
retransmission would have been necessary to deliver the packet to the remote destination, this
connection is declared to be down.
See also psiadmin(1).
statusBroadcasts number
Set the maximum number of status broadcasts per round. This is used to limit the number of status-
broadcasts per status-iteration. Too many broadcast might lead to running out of message-buffers
within RDP on huge clusters.
If more than this number of broadcasts are triggered during one status-iteration, all future broadcasts
will be ignored. The corresponding counter is reset upon start of the next status iteration.
A value of 0 will completly suppress sending of status-broadcasts. In this case information on dead
nodes will be propagated by sending ACTIVENODES messages upon receive of too many wrong
LOAD messages, only.
Only relevant, if MCast is *not* used.
See also psiadmin(1).
rdpTimeout ms
The timeout of the actual timer registered by RDP in milli-seconds. Each time the corresponding timer is
elapsed, handleTimeoutRDP() is called handling all resend activities necessary. This parameter steers
the actual load introduced by RDP. Within the daemon, there is a lower limit for all timeout-timers of
100 msec. Thus, the minimal value here is 100, too.
deadLimit number
Dead-limit of the RDP status module. After this number of consecutively missing RDP-pings the master
declares the node to be dead.
Only relevant, if MCast is *not* used.
statusTimeout ms
Timeout of the RDP status module. After this number of milli-seconds a RDP-ping is sent to the master
daemon. Additionally, the master daemon checks for received ping-messages. Within the daemon,
there is a lower limit for all timeout-timers of 100 msec. Thus, the minimal value here is 100, too.
Only relevant, if MCast is *not* used.
rdpClosedTimeout ms
The closed timeout within the RDP facility in milli-seconds. If a RDP-connection is closed, during this
timeout all messages from the corresponding partner are ignored. Thus, reconnection is avoided during
this period. This helps handling packets still on the wire on connection close.
rdpResendTimeout ms
The resend timeout within the RDP facility in milli-seconds. If a pending message is available and not
yet acknowledged, this is the timeout after which the message is retransmitted to the remote host.
rdpMaxACKPend number
The maximum number of pending ACKs within the RDP facility. If this number of packets is received
from a remote node consecutively without any retransmission, an explicit ACK is sent. Otherwise the