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From Carlos Sanchez <carlos.sanc...@riskmetrics.com>
Subject Re: Write times
Date Tue, 30 Mar 2010 00:39:52 GMT
Thanks a lot David


On Mar 29, 2010, at 6:53 PM, David Strauss wrote:

> 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.sanchez@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?
>
> --
> David Strauss
>   | david@fourkitchens.com
>   | +1 512 577 5827 [mobile]
> Four Kitchens
>   | http://fourkitchens.com
>   | +1 512 454 6659 [office]
>   | +1 512 870 8453 [direct]
>


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