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From "Sandeep Tata (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-195) Improve bootstrap algorithm
Date Tue, 11 Aug 2009 16:17:14 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741933#action_12741933
] 

Sandeep Tata commented on CASSANDRA-195:
----------------------------------------

I' suppose we could add support for bootstrap through MBean, but eventually, I'm guessing
"bootstrap mode" will be the default way for a node to join the cluster. For nodes that have
data and are coming back, we'll need a recovery version of bootstrap that perhaps uses the
Merkle trees.

> Improve bootstrap algorithm
> ---------------------------
>
>                 Key: CASSANDRA-195
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-195
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: all
>            Reporter: Sandeep Tata
>            Assignee: Sandeep Tata
>             Fix For: 0.5
>
>         Attachments: 195-v1.patch
>
>
> When you add a node to an existing cluster and the map gets updated, the new node may
respond to read requests by saying it doesn't have any of the data until it gets the data
from the node(s) the previously owned this range (the load-balancing code, when working properly
can take care of this). While this behaviour is compatible with eventual consistency, it would
be much friendlier for the new node not to "surface" in the EndPoint maps for reads until
it has transferred the data over from the old nodes.

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