what i want is that i get the records in the same order wich they were inserted. how can i get this using any type of comparator type if there is a code java for this it can be useful.
________________________________ De : aaron morton <aa...@thelastpickle.com> À : user@cassandra.apache.org Envoyé le : Mardi 28 Juin 2011 12h40 Objet : Re: Re : Re : get_range_slices result First thing is you really should upgrade from 0.6, the current release is 0.8. Info on time uuid's http://wiki.apache.org/cassandra/FAQ#working_with_timeuuid_in_java If you are using a higher level client like Hector or Pelops it will take care of encoding for you. Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 28 Jun 2011, at 22:20, karim abbouh wrote: can i have an example for using TimeUUIDType as comparator in a client java code. > > > > >________________________________ >De : karim abbouh <karim_...@yahoo.fr> >À : "user@cassandra.apache.org" <user@cassandra.apache.org> >Envoyé le : Lundi 27 Juin 2011 17h59 >Objet : Re : Re : get_range_slices result > > >i used TimeUUIDType as type in storage-conf.xml file > > <ColumnFamily Name="table" CompareWith="TimeUUIDType "/> > > >and i used it as comparator in my java code, >but in the execution i get exception : > >Erreur --java.io.UnsupportedEncodingException: TimeUUIDType > > > > >how can i write it? > > >BR > > > > >________________________________ >De : David Boxenhorn <da...@citypath.com> >À : user@cassandra.apache.org >Cc : karim abbouh <karim_...@yahoo.fr> >Envoyé le : Vendredi 24 Juin 2011 11h25 >Objet : Re: Re : get_range_slices result > >You can get the best of both worlds by repeating the key in a column, >and creating a secondary index on that column. > >On Fri, Jun 24, 2011 at 1:16 PM, Sylvain Lebresne <sylv...@datastax.com> wrote: >> 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 >>> >>> >>> >>> >> > > > > >
