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From "Jon Hermes (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1263) Push replication factor down to the replication strategy
Date Wed, 20 Oct 2010 18:54:26 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923092#action_12923092
] 

Jon Hermes commented on CASSANDRA-1263:
---------------------------------------

We need to make sure they give us a replication_factor. We cannot make it required on the
def because not all strategies use a static type to give us that information. We should not
verify arbitrary key/values in strategy_opts because that is FAR messier than the current
solution, and doesn't handle user-created strategies at all.

> Push replication factor down to the replication strategy
> --------------------------------------------------------
>
>                 Key: CASSANDRA-1263
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1263
>             Project: Cassandra
>          Issue Type: Task
>          Components: Core
>            Reporter: Jeremy Hanna
>            Assignee: Jon Hermes
>            Priority: Minor
>             Fix For: 0.7.0
>
>
> Currently the replication factor is in the keyspace metadata.  As we've added the datacenter
shard strategy, the replication factor becomes more computed by the replication strategy.
 It seems reasonable to therefore push the replication factor for the keyspace down to the
replication strategy so that it can be handled in one place.
> This adds on the work being done in CASSANDRA-1066 since that ticket will make the replication
strategy a member variable of keyspace metadata instead of just a quasi singleton giving the
replication strategy state for each keyspace.  That makes it able to have the replication
factor.

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