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From Vijay <vijay2...@gmail.com>
Subject Re: key is sorted?
Date Sun, 09 May 2010 17:27:07 GMT
True, The Range slice support was enabled in Random Partitioner for the
hadoop support.

Random partitioner actually hash the Key and those keys are sorted so we
cannot have the actual key in order.... (Hope this doesnt confuse you)...

Regards,
</VJ>



On Sun, May 9, 2010 at 12:00 AM, David Boxenhorn <david@lookin2.com> wrote:

> This is something that I'm not sure that I understand. Can somebody
> confirm/deny that I understand it? Thanks.
>
> If you use random partitioning, you can loop through all keys with a range
> query, but they will not be sorted.
>
> True or False?
>
> On Sat, May 8, 2010 at 3:45 AM, AJ Chen <ajchen@web2express.org> wrote:
>
>> thanks, that works. -aj
>>
>>
>> On Fri, May 7, 2010 at 1:17 PM, Stu Hood <stu.hood@rackspace.com> wrote:
>>
>>> Your IPartitioner implementation decides how the row keys are sorted: see
>>> http://wiki.apache.org/cassandra/StorageConfiguration#Partitioner . You
>>> need to be using one of the OrderPreservingPartitioners if you'd like a
>>> reasonable order for the keys.
>>>
>>> -----Original Message-----
>>> From: "AJ Chen" <ajchen@web2express.org>
>>> Sent: Friday, May 7, 2010 3:10pm
>>> To: user@cassandra.apache.org
>>> Subject: key is sorted?
>>>
>>> I have a super column family for "topic", key being the name of the
>>> topic.
>>> <ColumnFamily Name="Topic" CompareWith="UTF8Type" ColumnType="Super"
>>> CompareSubcolumnsWith="BytesType" />
>>> When I retrieve the rows, the rows are not sorted by the key. Is the row
>>> key
>>> sorted in cassandra by default?
>>>
>>> -aj
>>> --
>>> AJ Chen, PhD
>>> Chair, Semantic Web SIG, sdforum.org
>>> http://web2express.org
>>> twitter @web2express
>>> Palo Alto, CA, USA
>>>
>>>
>>>
>>
>>
>> --
>> AJ Chen, PhD
>> Chair, Semantic Web SIG, sdforum.org
>> http://web2express.org
>> twitter @web2express
>> Palo Alto, CA, USA
>>
>
>

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