cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Patricio Echague (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2045) Simplify HH to decrease read load when nodes come back
Date Thu, 21 Jul 2011 20:52:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13069201#comment-13069201
] 

Patricio Echague commented on CASSANDRA-2045:
---------------------------------------------

Tested with CASSANDRA-2928 patch and it works perfectly.

Test environment:
- 2 nodes on localhost (127.0.02 and .3)

Test case:
- start both nodes
- create the schema for testing
- stop node 1
- insert 5 keys into node 2.
- verified HintsColumnFamily that has 5 entries in node 2.
- start node 1.
- Verify that node 1 has the new data
- Verify that node 2 deleted the delivered hints.

> Simplify HH to decrease read load when nodes come back
> ------------------------------------------------------
>
>                 Key: CASSANDRA-2045
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2045
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Chris Goffinet
>            Assignee: Nicholas Telford
>             Fix For: 1.0
>
>         Attachments: 0001-Changed-storage-of-Hints-to-store-a-serialized-RowMu.patch,
0002-Refactored-HintedHandoffManager.sendRow-to-reduce-co.patch, 0003-Fixed-some-coding-style-issues.patch,
0004-Fixed-direct-usage-of-Gossiper.getEndpointStateForEn.patch, 0005-Removed-duplicate-failure-detection-conditionals.-It.patch,
0006-Removed-handling-of-old-style-hints.patch, 2045-v3.txt, 2045-v5.txt, 2045-v6.txt, CASSANDRA-2045-simplify-hinted-handoff-001.diff,
CASSANDRA-2045-simplify-hinted-handoff-002.diff, CASSANDRA-2045-v4.diff
>
>
> Currently when HH is enabled, hints are stored, and when a node comes back, we begin
sending that node data. We do a lookup on the local node for the row to send. To help reduce
read load (if a node is offline for long period of time) we should store the data we want
forward the node locally instead. We wouldn't have to do any lookups, just take byte[] and
send to the destination.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message