Having N replicas more than nodes in the cluster

Randall Leeds randall.leeds at gmail.com
Tue May 11 13:43:16 EDT 2010


On Tue, May 11, 2010 at 08:20, Grant Schofield <grant at basho.com> wrote:
>> I have a two nodes cluster and a bucket with n_val = 3.
>> I put more than 1 600 000 documents in the bucket and it takes less than 200 GB with Innostore.
>> I shut down the second node with "q()." in a "riak console".
>> Firstly, there was no synchronisation of data on the first node, i assume it's better because very similar to a node crash.
>> Secondly, when i did a read request on a document with :
>> - ?r=1 -> success
>> - ?r=2 -> success
>> - ?r=3 -> fail
>
> This is due to the fact that 2 of the 3 vnodes were able to respond with your data, but not the third because your took down the node that had 1 of the 3 partitions.

After the next round of gossip, will the remaining Riak node attempt
to reclaim these vnodes or does the ring structure persist until the
node has explicitly left?

-Randall




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