How are changes propagated to Fault Tolerent SpectroSERVERs when Event changes are made on the Primary?

Document ID : KB000039383
Last Modified Date : 14/02/2018
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After making changes to the EventDisp and/or Alertmap files on a Primary SpectroSERVER that are defined in the <$SPECROOT>/custom/Events directory, how are the changes propagated to fault tolerant servers? 



Spectrum 9.x

Spectrum 10.x



The EMSUpdateTime attribute is updated when an Event change occurs that affects the AlertMap or EventDisp files. This update can only be made via the Event Configuration Editor. Manual changes to the AlertMap or EventDisp or changes made via MibTools will not update the EMSUpdateTime attribute.

The Secondary SpectroSERVER monitors the Primary SpectroSERVER for status changes. During this time the EMSUpdateTime attribute is evaluated. If the timestamp has a newer value than the timestamp when the AlertMap and/or EventDisp file was last updated, the appropriate file will be updated on the Secondary SpectroSERVER.

For example:

On the Primary SpectroSERVER


The EMSUpdateTime attribute is on the VNM model.


This is the value of EMSUpdateTime before changes are made to the EventDisp file:


show attributes attr=0x12be0 mh=0x100000

0x12be0     EMSUpdateTime     1444411317


This is the value of the attribute after saving event changes in the Event Configuration UI

0x12be0     EMSUpdateTime     1456839348


UNIX time converts to:  3/1/2016, 8:35:48 AM GMT-5:00


On the Secondary SpectroSERVER


During the next status update the Secondary will query the EMSUpdateTime attribute on the VNM of the Primary SpectroSERVER and notice the timestamp has been updated. This will cause the Secondary SpectroSERVER to request the updated EventDisp file.



> ls -al

total 20

drwxr-xr-x 2 Administrator None     0 Mar  1 08:36 .

drwxr-xr-x 5 Administrator None     0 Feb 25 10:38 ..

-rw-r--r-- 1 Administrator None 17630 Mar  1 08:36 EventDisp



Additional Information:


For more information about working with Events in Spectrum please see: