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Posted to commits@cassandra.apache.org by "Jeremy Hanna (JIRA)" <ji...@apache.org> on 2011/07/30 03:04:13 UTC
[jira] [Created] (CASSANDRA-2970) Create separate read repair
settings for intra- versus inter- datacenter
Create separate read repair settings for intra- versus inter- datacenter
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Key: CASSANDRA-2970
URL: https://issues.apache.org/jira/browse/CASSANDRA-2970
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Jeremy Hanna
Priority: Minor
When doing read repair, it doesn't take into account the datacenter where the replicas are. It simply does a repair based on the read repair chance. Since multi-DC configurations would benefit from a lower chance between DC, it seems reasonable to have a separate setting for read repair between DCs than for within the DC.
Perhaps there could be a single property still, which would default both inter and intra for the sake of simple scenarios and backwards compatibility. Then if a more specific setting is specified (read_repair_chance_global or read_repair_chance_local), that would be used.
I'm not sure if this would complicate matters too much, but it builds on CASSANDRA-982 and CASSANDRA-1530 to help with efficiency between datacenters, especially in the case of an analytics cluster versus a realtime cluster - making them tunably more independent.
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[jira] [Resolved] (CASSANDRA-2970) Create separate read repair
settings for intra- versus inter- datacenter
Posted by "Jonathan Ellis (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CASSANDRA-2970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis resolved CASSANDRA-2970.
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Resolution: Duplicate
duplicate of CASSANDRA-2506
> Create separate read repair settings for intra- versus inter- datacenter
> ------------------------------------------------------------------------
>
> Key: CASSANDRA-2970
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2970
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jeremy Hanna
> Priority: Minor
>
> When doing read repair, it doesn't take into account the datacenter where the replicas are. It simply does a repair based on the read repair chance. Since multi-DC configurations would benefit from a lower chance between DC, it seems reasonable to have a separate setting for read repair between DCs than for within the DC.
> Perhaps there could be a single property still, which would default both inter and intra for the sake of simple scenarios and backwards compatibility. Then if a more specific setting is specified (read_repair_chance_global or read_repair_chance_local), that would be used.
> I'm not sure if this would complicate matters too much, but it builds on CASSANDRA-982 and CASSANDRA-1530 to help with efficiency between datacenters, especially in the case of an analytics cluster versus a realtime cluster - making them tunably more independent.
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