[jira] Resolved: (CASSANDRA-397) bootstrap and ringcache

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis resolved CASSANDRA-397.
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    Resolution: Won't Fix

Thinking about this further, I think the proposed solution (making bootstrap sources responsible for forwarding writes to the targets during bootstrap) is worse than the problem.

The reason is, we want to preserve ConsistencyLevel semantics during bootstrap, and if a CL.quorum/all write is sent to a bootstrap target, it would have to wait for the forwarded write to complete to report in turn that the write is good.

Leaving write propagation to be done by the write originator means we don't have this extra layer of latency.

I will create another ticket for making the write originator include bootstrap targets in the consistency computation.

> bootstrap and ringcache
> -----------------------
>
>                 Key: CASSANDRA-397
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-397
>             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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