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Robert Cemper · Nov 9, 2022

To achieve the expected result of individual storage you may take this approach:

Class Test.NewClass Extends %Persistent [ NoExtent ]
{
Property Name As %String [ Required ];
Index NameIndex On Name [ Unique ];
}

and
 

Class Test.NewClass1 Extends Test.NewClass
{
Storage Default
{
<Data name="NewClass1DefaultData">
<Value name="1">
<Value>%%CLASSNAME</Value>
</Value>
<Value name="2">
<Value>Name</Value>
</Value>
</Data>
<DataLocation>^Test.NewClass1D</DataLocation>
<DefaultData>NewClass1DefaultData</DefaultData>
<IdLocation>^Test.NewClass1D</IdLocation>
<IndexLocation>^Test.NewClass1I</IndexLocation>
<StreamLocation>^Test.NewClass1S</StreamLocation>
<Type>%Library.CacheStorage</Type>
}

}

and you see:
ERROR #5808: Key not unique: Test.NewClass1:NameIndex:^Test.NewClass1I("NameIndex"," A1")

Robert Cemper · Nov 3, 2022

Following this discussion since beginning I'm wondering about the variant I've learned.
my personal approach would be.
#1)
have an exact copy of your class also pointing to the same storage
remove all index definitions from that clone class
run your bulkload
#2)
if you don't want to have the same storage
just eliminate the index definitions in the copy
clean its storage and run your bulk load
finally, merge the resulting globals

#' .)
It's not pure OO,
but writing to storage is never OO with Caché or IRIS