Hi, I have been developing a UA server for CIM Server(IEC 61970/968) based on OPC UA JAVA SDK 1.01.
while I was developing the UA server, I found performance problems in data loading.

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○ Server Environment

1. Language : JAVA 1.6
2. SDK : Prosys SDK Ver 1.4.2 (OPC JAVA SDK : Opc.Ua.Stack-1.01.330.0)
3. Runtime Envirionment : CPU 2.93GHz(4 Cores), Memory 8GB, Windows 7
4. Data : Object Node 1,000,000 (Property Node 7,000,000)
5. Performance : 170,000 Nodes loading : 30 Minitutes (Too late)

over 180,000 ,,,, not estimated
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○ My Code – Load Object Data (addNode)
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newNodeId = new NodeId(ns, nodeId);
newObjectNode = new UaObjectNode(nodeManager, newNodeId, nodeName, Locale.ENGLISH);
newTypeId = new NodeId(ns, nodeType);
newType = new UaObjectTypeNode(nodeManager, newTypeId, nodeType, Locale.ENGLISH);
newObjectNode.setTypeDefinition(newType);
newNode.addReference((UaNode)newObjectNode, Identifiers.HasComponent, false);
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○ I assume, “UaServerReference.java” code has problems.
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UaReference[] sourceRefs = sourceNode.getReferences(referenceTypeId,
false);
if (sourceRefs != null)
for (UaReference r : sourceRefs)
if (r.getTargetId().equals(targetNode.getNodeId()))
return (UaServerReference) r;
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– Cause
1. Too many ExpandedNodeId garbage data were increasing in memory.

My questions is:

1. Could you please tell me if SDK upgrade plan for this?
2. How to load the data in this case?
3. Any kind of solution or experience to develop the BIG DATA circumstance.