The partitioner *is* the method by which Cassandra selects the node to
write to. Even if the client picks a node and requests a write there,
Cassandra will still do the write where it knows it belongs. Every node
is a gateway to do anything, anywhere in the cluster.

On 2010-03-29 23:31, Carlos Sanchez wrote:
> Would it be best then for the client to select the node to write to when 
> using OPP in order to evenly distributes the keys?
> 
> On Mar 29, 2010, at 6:05 PM, David Timothy Strauss wrote:
> 
>> OPP should only affect write speed if OPP's tendency to unevenly distribute 
>> load causes some nodes to be overworked.
>>
>> In other words, OPP vs. RP on a single node system should have no real 
>> effect.
>>
>> -----Original Message-----
>> From: Carlos Sanchez <carlos.sanc...@riskmetrics.com>
>> Date: Mon, 29 Mar 2010 18:58:50
>> To: user@cassandra.apache.org<user@cassandra.apache.org>
>> Subject: Write times
>>
>> Are writes on OrderPreservingPartitioner always slower than 
>> RandomPartitioner? Is the replication factor a 'factor' in the write times?

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David Strauss
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