"that is not possible to define different timestamps within a batch" --> It is possible : http://www.datastax.com/documentation/cql/3.1/cql/cql_reference/batch_r.html
On Tue, Jun 17, 2014 at 2:17 PM, tommaso barbugli <tbarbu...@gmail.com> wrote: > when inserting with a batch every row have the same timestamp; I also > think (not 100%) that is not possible to define different timestamps within > a batch. > > Tommaso > > > 2014-06-17 14:10 GMT+02:00 DuyHai Doan <doanduy...@gmail.com>: > > Hello all >> >> I know that at write time a timestamp is automatically generated by the >> server and assigned to each column. >> >> My questions are: >> >> 1) Who is responsible for this micro-second timestamp ? The coordinator >> which receives the insert request or each replica which actually do persist >> the data ? >> >> 2) In a case of a batch insert (CQL3 batch, not batch mutation Thrift >> API), if no user defined timestamp is set, neither on the batch statement >> nor on each individual statement, will C* generate a SAME timestamp for >> each individual statement in the batch or will there distinct timestamps ? >> >> Regards >> >> >> Duy Hai DOAN >> > >
