On Fri, Jun 24, 2011 at 10:21 AM, karim abbouh <karim_...@yahoo.fr> wrote: > i want get_range_slices() function returns records sorted(orded) by the > key(rowId) used during the insertion. > is it possible?
You will have to use the OrderPreservingPartitioner. This is no without inconvenience however. See for instance http://wiki.apache.org/cassandra/StorageConfiguration#line-100 or http://ria101.wordpress.com/2010/02/22/cassandra-randompartitioner-vs-orderpreservingpartitioner/ that give more details on the pros and cons (the short version being that the main advantage of OrderPreservingPartitioner is what you're asking for, but it's main drawback is that load-balancing the cluster will likely be very very hard). In general the advice is to stick with RandomPartitioner and design a data model that avoids needing range slices (or at least needing that the result is sorted). This is very often not too hard and more efficient, and much more simpler than to deal with the load balancing problems of OrderPreservingPartitioner. -- Sylvain > > ________________________________ > De : aaron morton <aa...@thelastpickle.com> > À : user@cassandra.apache.org > Envoyé le : Jeudi 23 Juin 2011 20h30 > Objet : Re: get_range_slices result > > Not sure what your question is. > Does this help ? http://wiki.apache.org/cassandra/FAQ#range_rp > Cheers > ----------------- > Aaron Morton > Freelance Cassandra Developer > @aaronmorton > http://www.thelastpickle.com > On 23 Jun 2011, at 21:59, karim abbouh wrote: > > how can get_range_slices() function returns sorting key ? > BR > > > >
