Re: questions about operations

2009-06-04 Thread Mark Robson
> > - what does get_key_range do? It looks like it returns a list of keys, but > why does one have to specify a list of column family names? It returns a list of keys which exist. In my experiments, I think that a key "existing" is defined as having at least one column in one column family that

Re: questions about operations

2009-06-04 Thread Jonathan Ellis
On Thu, Jun 4, 2009 at 12:33 AM, Thorsten von Eicken wrote: > I'm looking at the cassandra data model and operations and I'm running into > a number of questions I have not been able to answer: > > - what does get_columns_since do? I thought there's only one version of a > column stored. I'm puzz

Re: questions about operations

2009-06-04 Thread Thorsten von Eicken
Jonathan Ellis wrote: On Thu, Jun 4, 2009 at 12:33 AM, Thorsten von Eicken wrote: I'm looking at the cassandra data model and operations and I'm running into a number of questions I have not been able to answer: - what does get_columns_since do? I thought there's only one version of a colu

Re: questions about operations

2009-06-04 Thread Jonathan Ellis
On Thu, Jun 4, 2009 at 10:01 AM, Thorsten von Eicken wrote: > Ah, got it, I forgot about the time-sorted CFs. So does this mean that if I > call get_columns_since on a name-sorted CF I will get an invalid request > exception? And also if I call get_slice_by_name_range or get_slice_by_names > on a