Service Operations Insight

Expand all | Collapse all

Does SOI scavenge unlinked BinaryRelationships?

  • 1.  Does SOI scavenge unlinked BinaryRelationships?

    Posted 02-16-2017 11:05 AM

    We are using the Universal connector to create Services, CIs, and the BinaryRelationships between them. If we remove a Service or CI, we try to first remove the BinaryRelationship. However, we fear that these haven't always been removed.

     

    Does SOI have any mechanism to locate and remove incomplete relationships?  If the source or target has been removed, then the incomplete relationship becomes pointless and should be removed. If stale BinaryRelationships are not automatically removed, is there a good way to do this manually?

     

    If these incomplete relationships are not automatically deleted, we wonder if BinaryRelationships are re-used. If we have two services linked via BinaryRelationship, and we delete the target service, then add a BinaryRelationship (of the same Semantic type) to a new target service, will SOI re-use an existing BinaryRelationship?



  • 2.  Re: Does SOI scavenge unlinked BinaryRelationships?

    Broadcom Employee
    Posted 02-28-2017 12:19 PM

    Hi Brian,

    SOI manager always deletes the relationship when you remove a CI from a service. I am not sure how did you determined the relationships are left behind but here is a method you can use to find out if there are any stale relationship, in this example I am using a computer system CI

    - When you add a CI to a service there are multiple entries created in ca_ssa_binaryrelationship and CIRelationship tables.

    - The following SQL query will show you how many projections you have for one CI. Note down the c_mdrelementid for each of the projection. Normally you'll get two projection (CA:00030 and a projection from the connector, such as CA:00005), if the CI is added to a service than a new projection CA:00047 is created 

      select * from ca_ssa_computersystem where c_label='<label of the CI>'

    - Running the following SQL query will show you the relationship entries in the ca_ssa_binaryrelationship 

    select * from ca_ssa_binaryrelationship where c_mdrlementid LIKE '%<mdrelementid you have written down from above query>%'

    - Running the following SQL query will show you the relationship in the CIRelationship table

      select * from CIRelationship where BNodeCIID='<the CIID if the CI>'

    - if you run the following SQL query it'll show you any CI having relationship to a service

      select * from CIRelationship where ServiceCIID='<service CIID>'

    Note: Service and CI CIID can be found on the SOI Properties tab on the console. You can also find it in CI table.

    Thanks

    Shaheen



  • 3.  Re: Does SOI scavenge unlinked BinaryRelationships?

    Posted 03-09-2017 10:21 AM

    Thanks Shaheen.

     

    • Can you clarify when the ca_ssa_binaryrelationship table is used VS when the CIRelationship table gets used?
    • Also, if we use GCEventAddCmd to create a Service and a CI and a Relationship on the Universal Connector, and then later remove the Service and CI and Relationship via GCEventAddCmd, will SOI remove all traces of the Service, CI and Relationship from the ssa_ tables as well?


  • 4.  Re: Does SOI scavenge unlinked BinaryRelationships?

    Posted 07-05-2017 02:27 PM

    Still waiting on the follow-up questions regarding ca_ssa_binaryrelationship table VS CIRelationship table

     

    thanks