Compaq AA-Q88CE-TE manual Related Commands, Suspect Nosuspect

SET LINK

The new value for secs becomes effective only after a time of about one third of the current value of the link inactivity timeout.

The minimum useful value for secs is three. If a value is not specified, links inherit the current value of the node inactivity timeout. (See SET NODE /INACTIVITY_TIMEOUT.)

You can check the current value of the link inactivity timeout with the command SHOW LINK linkname/COUNTER=ndb_lw_inact.

You should not specify a value of less than five times the time required for a round trip over the link. If you don't know this value, RTR can measure it for you. Make sure that there is no transactional traffic over the link, and monitor the link (with the MONITOR LINK command) between the two nodes whose round trip time you want to measure. After a few minutes, look at the link counters ndb_lw_trips and ndb_lw_trips_ms using the SHOW LINK /COUNTER=ndb_lw_trips* command. Dividing the latter by the former yields the average round trip time in milliseconds.

Note

The inactivity timeout is used for all RTR links, but the effect of a timeout and failover depends on what connections the link is supporting. In brief, a link between a router and a backend timing out causes a router or backend failover and quorum re-negotiations. A frontend will search for another router.

/NODE[=node-list] /NODE=default-node-list (D)

Specifies that the command is executed on all nodes specified in node-list. If node-listis omitted then the command is executed only on the node where the command was issued.

/OUTPUT[=file-spec] /OUTPUT=stdout (D)

Specifies that the resulting information is written to the file file-spec. If /OUTPUT or file-specis omitted then the standard or default output is used.

/SUSPECT

/NOSUSPECT

Obsolete. Available for compatibility reasons only, use /AUTOISOLATE instead.

Related Commands

•SET NODE/AUTOISOLATE

•SHOW LINK/STATUS

6–114RTR Command Line Interface