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Date: Tue, 11 Aug 2009 09:17:14 -0700 (PDT)
From: "Sandeep Tata (JIRA)" <jira@apache.org>
To: cassandra-commits@incubator.apache.org
Subject: [jira] Commented: (CASSANDRA-195) Improve bootstrap algorithm
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    [ 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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