I am not using any client, I am trying to extend Cassandra with a new API call so that a _node_ will do that on behalf of clients. Thank you for the answer, but it doesn't answer my question!
Alexander > Most of the high level clients do this for you. > > For example, pycassa and phpcassa both do this by returning an > iterator from get_range() and breaking it up behind the scenes. > > Hector also has something similar, but I think it's in the examples > section. > > What client are you using? > > (By the way, beta1 is old and buggy! You should switch to beta3.) > > - Tyler > > On Fri, Nov 19, 2010 at 8:33 AM, <alta...@ceid.upatras.gr> wrote: > >> Hello, >> >> I would like one of the cluster's nodes to use get_range_slices() to >> retrieve the values of a specific column for the entire keyspace. I >> obviously don't want to do it for the whole keyspace at once, so I'd >> like >> to do it in groups of n, which should be configurable. >> >> I get the first n values using a KeyRange with the current node's local >> token as start_token and end_token, which equals the whole keyspace. >> >> After that, it makes sense to have a loop, and to use each time a new >> KeyRange with the largest key returned by the previous iteration as the >> start_key. However, I don't know what to use as end_key, and Cassandra >> complains that if one of (start_key, end_key) is not null, the other >> can't >> be either. What can I do? >> >> Can I use tokens? I read that a KeyRange with tokens is end-inclusive, >> and >> can wrap, so I can just give the local node's token as the end_token all >> the time, so when the traversing reaches that node again, it will know >> the >> whole keyspace was traversed. Or are tokens different semantically? >> >> I am using Cassandra 0.7.0 beta1, and the OrderPreservingPartitioner. >> >> Alexander Altanis >> >> >> >> >> >> >
