[CASSANDRA-14556] Stream entire SSTables when possible

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0
• Component/s: Streaming and Messaging
• Labels: Performance
• Assignee: Dinesh Joshi
• Reporter: Dinesh Joshi

Reviewers

Aleksey Yeschenko, Ariel Weisberg

• Created: 03/Jul/18 19:01
• Updated: 27/Jul/18 18:47
• Resolved: 27/Jul/18 18:41

Description

During streaming, Cassandra reifies the sstables into objects. This creates unnecessary garbage and slows down the whole streaming process as some sstables can be transferred as a whole file rather than individual partitions. The objective of the ticket is to detect when a whole sstable can be transferred and skip the object reification. We can also use a zero-copy path to avoid bringing data into user-space on both sending and receiving side.

Issue Links

• relates to: CASSANDRA-14586 Performant range containment check for SSTables
• links to: GitHub Pull Request #239