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From Vijay <vijay2...@gmail.com>
Subject Re: key is sorted?
Date Wed, 12 May 2010 23:42:23 GMT
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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