AHeise commented on a change in pull request #11507: [FLINK-16587] Add basic
CheckpointBarrierHandler for unaligned checkpoint
URL: https://github.com/apache/flink/pull/11507#discussion_r404581205
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/serialization/SpillingAdaptiveSpanningRecordDeserializer.java
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@@ -557,6 +579,28 @@ private void addNextChunkFromMemorySegment(MemorySegment
segment, int offset, in
}
}
+ @Nullable
+ MemorySegment copyToTargetSegment() {
+ // for the case of only partial length, no data
+ final int position = lengthBuffer.position();
+ if (position > 0) {
+ MemorySegment segment =
MemorySegmentFactory.allocateUnpooledSegment(lengthBuffer.remaining());
+ segment.put(0, lengthBuffer,
lengthBuffer.remaining());
+ lengthBuffer.position(position);
+ return segment;
+ }
+
+ // for the case of full length, partial data in buffer
+ if (recordLength != -1) {
+ // In the PoC we skip the case of large record
which size exceeds THRESHOLD_FOR_SPILLING,
Review comment:
I had an idea, since Roman's `ChannelStateByteBuffer` is reading in chunks
of 1024 bytes from the `Buffer(Builder)`, could we create a virtual buffer that
spans over all parts?
We could even try to evaluate if that is also a proper abstraction to be
used instead of `SpillingAdaptiveSpanningRecordDeserializer` in some future PR.
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