Duong created HDDS-10283:
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Summary: Apply Zero-Copy when Ozone client reads chunks
Key: HDDS-10283
URL: https://issues.apache.org/jira/browse/HDDS-10283
Project: Apache Ozone
Issue Type: Bug
Reporter: Duong
Ozone client, or ChunkInputStream, reads chunks via grpc call. The chunk data
is included in the `ReadChunkResponseProto` serialized by GRPC. By default,
GRPC serializes bytes data by copying the data it receives from network (in the
native memory zone) to heap buffers (LiteralByteString). The ChunkInputStream
uses these buffers to back the read.
We can apply zero-copy marshaller (ZeroCopyMessageMarshaller) to client reads
to instruct GRPC to serialize chunks by wrapping the direct buffers of data
received from the network. This will eliminate the need to allocate extra heap
buffers when reading data.
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