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From Jonathan Shook <jsh...@gmail.com>
Subject Re: key is sorted?
Date Thu, 13 May 2010 00:37:35 GMT
Although, if replication factor spans all nodes, then the disparity in
row allocation should be a non-issue when using
OrderPreservingPartitioner.

On Wed, May 12, 2010 at 6:42 PM, Vijay <vijay2win@gmail.com> wrote:
> If you use Random partitioner, You will NOT get RowKey's sorted. (Columns
> are sorted always).
> Answer: If used Random partitioner
> True True
>
> Regards,
> </VJ>
>
>
>
> On Wed, May 12, 2010 at 1:25 AM, David Boxenhorn <david@lookin2.com> wrote:
>>
>> You do any kind of range slice, e.g. keys beginning with "abc"? But the
>> results will not be ordered?
>>
>> Please answer one of the following:
>>
>> True True
>> True False
>> False False
>>
>> Explain?
>>
>> Thanks!
>>
>> On Sun, May 9, 2010 at 8:27 PM, Vijay <vijay2win@gmail.com> wrote:
>>>
>>> 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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