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From David Boxenhorn <da...@lookin2.com>
Subject Re: key is sorted?
Date Sun, 09 May 2010 12:45:55 GMT
But you will get all the keys, right?

I want to get all the keys, but I don't care about the order.

On Sun, May 9, 2010 at 3:25 PM, Shinpei Ohtani <shinpei.ohtani@gmail.com>wrote:

> Hi,
>
> > If you use random partitioning, you can loop through all keys with a
> range
> > query, but they will not be sorted.
> >
> > True or False?
>
> I think they will be sorted in a way of MD5 hash if you use
> RandomPartitioner,
> at least I looked into SSTables and RandomPartitioner#getToken.
>
> On Sun, May 9, 2010 at 4:00 PM, 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
> >
> >
>
>
>
> --
> =============================
> Shinpei Ohtani
> mail    : shinpei.ohtani@gmail.com
> blog    : http://d.hatena.ne.jp/shot6/
> twitter : http://twitter.com/shot6
> =============================
>

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