Yuki Morishita created CASSANDRA-4297:
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Summary: Use java NIO as much as possible when streaming
compressed SSTables
Key: CASSANDRA-4297
URL: https://issues.apache.org/jira/browse/CASSANDRA-4297
Project: Cassandra
Issue Type: Improvement
Reporter: Yuki Morishita
Assignee: Yuki Morishita
Priority: Minor
Fix For: 1.2
Back in 0.8, streaming uses java NIO (FileChannel#transferTo/transferFrom) to
perform zero copy file transfer between nodes. Since 1.0, in order to add new
features like sstable compression and internode encryption we had to switch to
java IO Input/OutputStreams. What we currently do to transfer compressed
SSTable is, in source node, 1) decompress chunk in SSTable, 2) compress using
LZF for network, and in destination node, 3) decompress using LZF as reading
from socket, 4) compress for SSTable on disk.
Now, 1.1 comes out with SSTable compression turned on by default. It is
reasonable to transfer compressed file as is using NIO instead of
decompress/compress in source node.
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