You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@cassandra.apache.org by "Stu Hood (JIRA)" <ji...@apache.org> on 2011/02/03 23:02:28 UTC
[jira] Created: (CASSANDRA-2106) Warn or fail when read repair is
disabled with the dynamic snitch
Warn or fail when read repair is disabled with the dynamic snitch
-----------------------------------------------------------------
Key: CASSANDRA-2106
URL: https://issues.apache.org/jira/browse/CASSANDRA-2106
Project: Cassandra
Issue Type: Improvement
Reporter: Stu Hood
Priority: Minor
When read repair is completely disabled, the dynamic snitch will never adjust.
Options:
# Explicitly disallow running with RR==0 + des
# Implicitly enable RR at some low fraction when des is in use
# Log warnings
--
This message is automatically generated by JIRA.
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] Commented: (CASSANDRA-2106) Warn or fail when read repair is
disabled with the dynamic snitch
Posted by "Jonathan Ellis (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CASSANDRA-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12990337#comment-12990337 ]
Jonathan Ellis commented on CASSANDRA-2106:
-------------------------------------------
Logging a warning if NO CF has RRC > 0 is reasonable -- remember that while RRC is per-CF the snitch information is global. As long as you're doing reads for data in any CF from some node you will have latency info for it.
> Warn or fail when read repair is disabled with the dynamic snitch
> -----------------------------------------------------------------
>
> Key: CASSANDRA-2106
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2106
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Stu Hood
> Priority: Minor
> Labels: des
> Fix For: 0.8
>
>
> When read repair is completely disabled, the dynamic snitch will never adjust.
> Options:
> # Explicitly disallow running with RR==0 + des
> # Implicitly enable RR at some low fraction when des is in use
> # Log warnings
--
This message is automatically generated by JIRA.
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] Updated: (CASSANDRA-2106) Warn or fail when read repair is
disabled with the dynamic snitch
Posted by "Stu Hood (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CASSANDRA-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stu Hood updated CASSANDRA-2106:
--------------------------------
Fix Version/s: 0.8
Labels: des (was: )
> Warn or fail when read repair is disabled with the dynamic snitch
> -----------------------------------------------------------------
>
> Key: CASSANDRA-2106
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2106
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Stu Hood
> Priority: Minor
> Labels: des
> Fix For: 0.8
>
>
> When read repair is completely disabled, the dynamic snitch will never adjust.
> Options:
> # Explicitly disallow running with RR==0 + des
> # Implicitly enable RR at some low fraction when des is in use
> # Log warnings
--
This message is automatically generated by JIRA.
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Resolved] (CASSANDRA-2106) Warn or fail when read repair is
disabled with the dynamic snitch
Posted by "Jonathan Ellis (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CASSANDRA-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis resolved CASSANDRA-2106.
---------------------------------------
Resolution: Fixed
Assignee: Jonathan Ellis
I can't think of a good way to pick a threshold that won't generate false positives for at least some use cases. Added warning to the cli documentation instead in r1092440.
> Warn or fail when read repair is disabled with the dynamic snitch
> -----------------------------------------------------------------
>
> Key: CASSANDRA-2106
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2106
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Stu Hood
> Assignee: Jonathan Ellis
> Priority: Minor
> Labels: des
> Fix For: 0.8
>
>
> When read repair is completely disabled, the dynamic snitch will never adjust.
> Options:
> # Explicitly disallow running with RR==0 + des
> # Implicitly enable RR at some low fraction when des is in use
> # Log warnings
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira