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From Michal August├Żn <augustyn.mic...@gmail.com>
Subject Re: OrderPreservingPartitioner for get_range_slices
Date Wed, 15 Sep 2010 19:30:10 GMT
And what about uniqueness? Can we be sure that we get each row just once?

Thanks.

2010/9/15 Janne Jalkanen <Janne.Jalkanen@ecyrd.com>

>
> Correct. You can use get_range_slices with RandomPartitioner too, BUT the
> iteration order is non-predictable, that is, you will not know in which
> order you get the rows (RandomPartitioner would probably better be called
> ObscurePartitioner - it ain't random, but it's as good as if it were ;-).
> This I find to be mostly useful when you want to go through your entire
> keyspace, like when doing something map-reduce like.  Or you just have a
> fairly small CF.
>
> /Janne
>
>
> On Sep 15, 2010, at 20:26 , Rana Aich wrote:
>
>  Hi All,
>>
>> I was under the impression that in order to query with get_range_slices
>> one has to have a OrderPreservingPartitioner.
>>
>> Can we do get_range_slices with RandomPartitioner also? I can distinctly
>> remember I read that(OrderPreservingPartitioner for get_range_slices) in
>> Cassnadra WIKI but now somehow I'm not finding it anymore.
>>
>> Can anyone throw some light on it.
>>
>> Thanks and Regards,
>>
>> Rana
>>
>
>

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