Does CMDB alert group/correlation consider Service map based data

[SNExploreGuru]

Hi,

ServiceNow have CMDB based alert grouping option, does it group/correlate the alerts related to CIs of a Application Service?

For example,

I have a sample application service( refer below pic), will ServiceNow correlate and group the alert related to DALWAP251, DALWAP254, DALWAP0139 into one CMDB group?

[Community Alums · Accepted solution]

Hi @Guruprasad DS ,

The answer is NO for you !! CMDB groups are formed based on 3 ways. See if your requirement fits.

Details as below.

CMDB Alert Grouping.

• CMDB Alert Grouping is based on Topology. For CIs without historical data, alerts are correlated based on those CIs relationships in the CMDB.
• This feature can be enabled by setting "sa_analytics.agg.query_cmdb_correlation_enabled" property to true.
• There are 3 different mechanisms used to form a CMDB group.
  
  
  • Applicative Flow 
  • Suggested Relationship
  • Metadata definition

• Applicative Flow 
  • This is based on Business Service nodes.
  • It is controlled using property "sa_analytics.applicative_flow_rc_enabled"

• Suggested Relationship
  • This is based on the Suggested relationship table.
  • It is controlled using property "evt_mgmt.related_cis_use_suggested_relations_rules"

• Metadata Definitons
  • This is based on the Hosting/Containment IRE Rules.
  • It is controlled using below properties:
    
    evt_mgmt.related_cis_use_hosting_rules – control on group hosting rules (true/false) 
    evt_mgmt.related_cis_use_containment_rules - control on group containment rules (true/false)
    
    
• The nodes grouped together should be related by a number specified in property sa_analytics.agg.query_cmdb_graph_walk_nodes. It means we can reach one CI to another by not more than walk_nodes hops/levels/neighbors value specified. 

Here are the Alert group types :https://docs.servicenow.com/bundle/sandiego-it-operations-management/page/product/event-management/c...

Mark my answer correct & Helpful, if Applicable.

Thanks,

Sandeep

[SNExploreGuru]

Thanks a lot Sandeep Dutta for detailed explanation with config pointers.

Can you please guide me how and where we can set the above mentioned properties?

Regards,

Guru

[Community Alums]

Hi @Guruprasad DS ,

Glad to see my answer helped you, Kindly mark the answer as Correct & Helpful both such that others can get help.

you can get these properties in the sys_properties table only.

Just type in the app Navigator sys_properties.list

For example:

Thanks,
Sandeep