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From "Sandeep Tata (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-397) bootstrap and ringcache
Date Fri, 28 Aug 2009 20:45:32 GMT


Sandeep Tata commented on CASSANDRA-397:

>> it seems like making the nodes doing the work is a better encapsulation. 

Yes, I'm trying to say that the nodes are already doing the work.

The fat client's don't have their own write path, do they? AFAIK, they still talk thrift and
submit writes to a Cassandra node.
So long as the fat client is not in charge of sending the write to all the right replicas
and doing HHO if needed, it doesn't need to discover the bootstrapping nodes. It doesn't need
to know *anything* about the bootstrap process. 

> bootstrap and ringcache
> -----------------------
>                 Key: CASSANDRA-397
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jonathan Ellis
>             Fix For: 0.5
> Bootstrap mode makes it easy to shoot yourself in the foot with RingCache (see CASSANDRA-197).
> One solution would be to have the node that is providing data to the new, bootstrapping
node, echo writes to the new node.  Currently, the coordinator node is in charge of including
the new node as an "extra" replica, but if a fat client is using messagingservice directly
with RingCache that doesn't work.

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