data is always written to all replicas in the cluster. here is good diagram how this happens in the multi-dc cluster: https://docs.datastax.com/en/dse/6.7/dse-arch/datastax_enterprise/dbInternals/dbIntClientRequestsMultiDCWrites.html
regarding the second question - theoretically, yes, it's possible, but if they were done for the same primary key, then they will be resolved via data timestamp. On Sun, Sep 20, 2020 at 5:31 PM Jai Bheemsen Rao Dhanwada < jaibheem...@gmail.com> wrote: > Hello, > > I have a question regarding multi Datacenter replication. > In a multi datacenter(dc-1, dc-2) if two records are written into dc-1 is > there a guarantee that these two records replicate to dc-2 in the same > order or is there a possibility that second insert replicate faster than > first insert? (Assuming first record is bigger than seconds record in terms > of packet size). > -- With best wishes, Alex Ott http://alexott.net/ Twitter: alexott_en (English), alexott (Russian)
