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From David Boxenhorn <da...@lookin2.com>
Subject Re: key is sorted?
Date Wed, 12 May 2010 08:25:39 GMT
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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