Query Retrieve after Instance Records Purged - dcm4che/dcm4chee-arc-light GitHub Wiki

The test is to verify that Retrieve Cache is used when query/retrieve is being done from a Nearline storage even after the series metadata is accumulated and instance records have been purged from database. This means that object(s) are first copied to the retrieve cache from nearline and then sent to destination. In addition to that, the json file(s) of the object(s) in the updated series-metadata zip files should now also contain the reference to retrieve-cache storage.

In addition to basic configuration done for retrieve cache and series metadata configuration, below configuration is needed to enable the purging of instance records from database.

• Go to Configuration page, Devices tab and edit dcm4chee-arc device. Edit extension of Device Extension, next Edit extension of Archive Device.
• Go to Attributes section of Archive Device and ensure that one has values set for fields Purge Instance Records, Purge Instance Records Delay and Purge Instance Records Polling Interval and Save.

One may

• create a LDIF file (e.g.):

    dn: dicomDeviceName=dcm4chee-arc,cn=Devices,cn=DICOM Configuration,dc=dcm4che,dc=org
    changetype: modify
    add: dcmPurgeInstanceRecordsDelay
    dcmPurgeInstanceRecordsDelay: PT1M
  
    dn: dicomDeviceName=dcm4chee-arc,cn=Devices,cn=DICOM Configuration,dc=dcm4che,dc=org
    changetype: modify
    add: dcmPurgeInstanceRecordsPollingInterval
    dcmPurgeInstanceRecordsPollingInterval: PT1M
  
    dn: dicomDeviceName=dcm4chee-arc,cn=Devices,cn=DICOM Configuration,dc=dcm4che,dc=org
    changetype: modify
    add: dcmPurgeInstanceRecordsFetchSize
    dcmPurgeInstanceRecordsFetchSize: 10
    
    dn: dicomDeviceName=dcm4chee-arc,cn=Devices,cn=DICOM Configuration,dc=dcm4che,dc=org
    changetype: modify
    add: dcmPurgeInstanceRecords
    dcmPurgeInstanceRecords: true        
  

One may refer to Archive Device to understand the description of attributes.

Refer ISO-8601 Duration format for more know-how on Durations.

Go to the Control tab on Configuration page in archive UI and reload the configuration.

• Perform test steps and the corresponding verifications.
• In addition, verify the value of private attribute Instance Record Purge State of Series is PURGED on Series and Object level.