Move streams too many data
--------------------------
Key: CASSANDRA-3639
URL: https://issues.apache.org/jira/browse/CASSANDRA-3639
Project: Cassandra
Issue Type: Improvement
Affects Versions: 0.8.7
Reporter: Fabien Rousseau
Priority: Minor
Attachments:
0001-try-to-fix-move-streaming-too-many-data-unit-tests.patch
During a move operation, we observed that the node streamed most of its data
and received all its data.
We are running Cassandra 0.8.7 (plus a few patches)
After reading the code related to "move", we found out that :
- in StorageService.java, line 2002 and line 2004 => ranges are returned in a
non ordered collection, but calculateStreamAndFetchRanges() method (line 2011)
assume ranges are sorted, thus, resulting in wider ranges to be fetched/streamed
We managed to isolate and reproduce this in a unit test.
We also propose a patch which :
- does not rely on any sort
- adds a few unit tests (may not be exhaustive...)
Unit tests are done only for RF=2 and for the "OldNetworkStrategyTopology". For
the sake of simplicity, we've put them in OldNetworkStrategyTopologyTest, but
they probably should be moved.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
