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https://issues.apache.org/jira/browse/CASSANDRA-492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vijay updated CASSANDRA-492:
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Attachment: (was: cassandra-DCAWARE.patch)
> Data Center Quorum
> ------------------
>
> Key: CASSANDRA-492
> URL: https://issues.apache.org/jira/browse/CASSANDRA-492
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Affects Versions: 0.5
> Environment: Cassandra Core Code
> Reporter: Vijay
> Priority: Minor
> Fix For: 0.5
>
> Attachments: DC-Config.xml
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> Need a Cassandra Datacenter Quorum Read and Datacenter Quorum Write.
> Add 1 new enum DC_Quorum. basically reads with this will not span across the
> datacenter it will use the existing nodes in the Datacenter which has this
> data and read from it.
> For writes - All the data centers need to get this data, (datac enters will
> be configured in the storage-config.xml and number of replicas in it). Once
> configured write will basically write to all the nodes in all the datacenter
> but will wait only for the write in the current datacenter.
> Example: We have 3 Datacenter A,B,C A has a replication factor of 3, B has 2
> and C has 2. DC_Quorum write will make sure to write on 2 of 3 nodes in A....
> B and C (total 4 +1) nodes will be eventually consistent.
> Changes will be in RackAware, storage, read and write classes.
> Thanks
> Vijay
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