Unconstrained deletion of objects of studies from storage system trig…

…gered by deletion threshold dcm4che/dcm4chee-arc-light#1745

Purge all objects on storage system available on an other storage system dcm4che/dcm4chee-arc-light#1746

docs/networking/config/hl7StudyRetentionPolicy.rst

@@ -28,7 +28,7 @@ HL7 Study Retention Policy
     "
     .. _dcmMaxRetentionPeriod:
 
-    :ref:`Maximal Study Retention Period <dcmMaxRetentionPeriod>`",string,"Minimal Study Retention Period in ISO-8601 period format PnYnMnD or PnW
+    :ref:`Maximal Study Retention Period <dcmMaxRetentionPeriod>`",string,"Maximal Study Retention Period in ISO-8601 period format PnYnMnD or PnW
 
     (dcmMaxRetentionPeriod)"
     "

docs/networking/config/storage.rst

@@ -32,6 +32,12 @@ Storage Descriptor
 
     (dcmInstanceAvailability)"
     "
+    .. _dcmStorageDuration:
+
+    :ref:`Storage Duration <dcmStorageDuration>`",string,"Indicates if the Storage is used as permanent (=PERMANENT), cache (=CACHE) or temporary (=TEMPORARY) storage. Objects get purged from cache and temporary storage according configured deleter thresholds or - if no deleter threshold is specified - all objects on the Storage will get purged. In the case of temporary storage, the studies which objects were purged are also deleted from the database. Enumerated values: PERMANENT, CACHE or TEMPORARY.
+
+    (dcmStorageDuration)"
+    "
     .. _dcmReadOnly:
 
     :ref:`Read Only <dcmReadOnly>`",boolean,"Indicates if a Storage System is read only.
@@ -52,7 +58,7 @@ Storage Descriptor
     "
     .. _dcmDeleterThreshold:
 
-    :ref:`Deleter Threshold(s) <dcmDeleterThreshold>`",string,"Minimal Usable Space on Storage System to trigger deletion. If present, studies are deleted from the Storage System, if the usable space fall below that value. Format [nn'['<schedule>']']nnn(MB|GB|MiB|GiB)
+    :ref:`Deleter Threshold(s) <dcmDeleterThreshold>`",string,"Minimal Usable Space on Storage System to trigger deletion. If present, studies are deleted from the Storage System configured for cache (Storage Duration = CACHE) or temporary (Storage Duration = TEMPORARY) storage, if the usable space fall below that value. If absent all studies are deleted from cache/temporary storage. Format [nn'['<schedule>']']nnn(MB|GB|MiB|GiB).
 
     (dcmDeleterThreshold)"
     "
@@ -64,13 +70,13 @@ Storage Descriptor
     "
     .. _dcmExternalRetrieveAET:
 
-    :ref:`External Retrieve AET <dcmExternalRetrieveAET>`",string,"Constrain deletion of Studies, if usable space falls below the configured threshold, to Studies which objects are retrievable using this AE from an external C-MOVE SCP.
+    :ref:`External Retrieve AET <dcmExternalRetrieveAET>`",string,"Constrains deletion of Studies from the Storage System to Studies which objects are retrievable using this AE from an external C-MOVE SCP.
 
     (dcmExternalRetrieveAET)"
     "
     .. _dcmExportStorageID:
 
-    :ref:`Export Storage ID <dcmExportStorageID>`",string,"Constrain deletion of Studies, if usable space falls below the configured threshold, to Studies which objects are also accessible from the specified other storage.
+    :ref:`Export Storage ID <dcmExportStorageID>`",string,"Constrains deletion of Studies from the Storage System to Studies which objects are also accessible from the specified other storage.
 
     (dcmExportStorageID)"
     "
@@ -86,12 +92,6 @@ Storage Descriptor
 
     (dcmRetrieveCacheMaxParallel)"
     "
-    .. _dcmNoDeletionConstraint:
-
-    :ref:`No Deletion Constraint <dcmNoDeletionConstraint>`",boolean,"If no External Retrieve AET or Export Storage ID is configured on Storage Descriptor and deleter threshold is reached, by default studies will not be deleted.
-
-    (dcmNoDeletionConstraint)"
-    "
     .. _dcmProperty:
 
     :ref:`Storage Property(s) <dcmProperty>`",string,"Property in format <name>=<value>