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From "Vijay (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-952) DC Quorum broken @ trunk
Date Sat, 01 May 2010 20:55:56 GMT


Vijay updated CASSANDRA-952:

    Attachment: 952-v5.txt

I have attached the changes, Please note that we have to change a bit of logic in rangeslice
in order to remove blockFor for from the SP, IF you think it is unnecessary, i put blockFor
for now and add a depreciated annotation on it (by doing this i can leave the rangeslice untouched).

> DC Quorum broken @ trunk
> ------------------------
>                 Key: CASSANDRA-952
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.6
>         Environment: Linux, Cassandra
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>             Fix For: 0.7, 0.8
>         Attachments: 952-Canges_To_Stategy_V002.txt, 952-Change_BlockFor.txt, 952-Changes_To_ResponseHandler_v002.txt,
952-Fix_Refactor_DCStatergy.txt, 952-v3.txt, 952-v4.txt, 952-v5.txt, DC-Config.xml
> Currently DCQuorum is broken in trunk, Suggesting the following fix... 
> Write to DC's
> 1) Move determineBlockFor(int expandedTargets, ConsistencyLevel consistency_level) to
> 2) Add the same to support DC Quorum in DatacenterShardStategy
> Read to DC's
> 1) find suitable nodes was a list which was returning a list of local DC's earlier but
now it is just one node and MD is been sent by other nodes. Need to have an option to even
avoid MD from other DC's?

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