Christofer Dutz created PLC4X-120:
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Summary: Query optimizer for PLC4X Requests
Key: PLC4X-120
URL: https://issues.apache.org/jira/browse/PLC4X-120
Project: Apache PLC4X
Issue Type: New Feature
Components: Core
Reporter: Christofer Dutz
Almost all protocols support asking for multiple items in one request. However
the size of a request is usually limited.
Now there are multiple possible optimizations possible:
- Aggregate items that are close to each other (Instead of reading multiple
bytes which are located in close proximity, load one byte array instead)
- Rearange the items so request and response are filled to the maximum
- Split the request up into multiple requests
For the S7 driver I had implemented the last part, but not the others.
Instead of implementing this for one protocol (as I did for S7) she's going to
try to implement this in a generic fashion so we can add this as a layer in all
Java drivers (can port things to other languages later). Currently all
protocols except s7 read each item in a single request, which is highly
imperformant.
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