There's no easy way to do this that I'm aware of. Snapshots are just hardlinks to existing SSTable files. Your best option is probably either scanning the CF with a normal client or setting up an M/R job.
On Mon, Nov 11, 2013 at 5:06 PM, Turi, Ferenc (GE Power & Water, Non-GE) < ferenc.t...@ge.com> wrote: > Hi, > > > > I have a question which I was not able to find the right answer for. > > What is the best way to backup/restore a set of columns? > > Let’s say we have: > > > > CF1(a,b,c,d) – a,b,c,d are columns/ original CF we would like to take > backup from > > > > CF2(d,e,f,g) – e,f,g are different columns, we would restore data into CF2 > > > > A,b,c,d,e,f,g have the same type. Let’s say text. > > > > Cassandra version: 1.2.10, 3.1.4 datastax distribution > > The structure which we would like to take backup from differs from the > restore CF. > > > > - Copy from/copy to cannot be used in cqlsh / error: rcp_timeout > > - Hive /insert overwrite xxx from …. cannot specify columns / I > don’t want to save all columns and would like to restore into different > structure. > > > > So what would be the solution? Is it possible at all? > > > > Thanks. > > > -- Tyler Hobbs DataStax <http://datastax.com/>
