ReleaseAllResources

  1. The subarray Node provides API for ReleaseAllResources workflow.

  2. Input JSON is as per schema detailed at : https://developer.skao.int/projects/ska-schemas/en/latest/schemas/tmc/ska-tmc-releaseresources.html

  3. The Sub-array node accepts the command if :-

    1. Admin mode reported by each of the system - CSP,SDP subarray are in ONLINE/ENGINEERING/RESERVED

    2. Operational state of the Sub-array node is ON/OFF/INIT/STANDBY/ALARM

  4. The Sub-array Node rejects the command if :-

    1. Admin mode reported by each of the system - CSP,SDP Sub-array are in OFFLINE or NOT FITTED.

    2. Operational state of central node is FAULT/UNKNOWN/DISABLE .

  5. The following state requirements are applied for the command execution :-

    1. TMC Subarray is in ‘observation state’ EMPTY or IDLE .

    2. isSubarrayAvailable is checked to ensure the subsystems (CSP and SDP) are available

  6. The command execution involves below key operations :-

    1. For CSP and SDP , no JSON is sent to leaf nodes.

    2. Dish Leaf node and Dish master events are unsubscribed for assigned dishes

    3. When command is invoked on the relevant TMC CSP, SDP, leaf Nodes.

      • If leaf node rejects release resources command , command failure is reported as ‘RESULT_CODE - FAILED’ on Long Running Command Result attribute of the TMC Subarray node.Command will not be sent to remaining subsystems in this case if multiple subsystems are involved .

      • If all leaf node accept command , the TMC Subarray node will wait for command completion.

  7. The Sub-array node monitors the progress of command via the Sub-array node ObsState transitions and the long running command results.

    1. Command is successful when the TMC Subarray Node transitions to EMPTY ObsState. This is reported as ‘RESULT_CODE - OK’ on Long Running Command Result attribute of TMC Subarray node.

    2. Command failure is reported in any of the below cases as ‘RESULT_CODE - FAILED’ on Long Running Command Result attribute of the Subarray node.

      • The CSP Leaf node/SDP Leaf node reports ‘RESULT_CODE - FAILED’ on its Long Running Command Result attribute

      • The command times out if TMC SubarrayNode does not transition to EMPTY within the timeout period specified by CommandTimeOutDefault property specified in helm chart of the TMC Subarray node .

  8. On success the system is ready for fresh observation; on failure it may revert to IDLE or FAULT depending on severity.

  9. When all targeted subsystems report successful completion, cleanup on the TMC subarray node proceeds. Assigned resources attribute is reset.