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

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ParaStation5 Administrator's Guide

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PAR Technologies V5 manual RdpMaxRetrans number, StatusBroadcasts number, RdpTimeout ms, DeadLimit number, StatusTimeout ms