If the keyspace already exist, use copy command or sstableloader to merge data. If data volume it too big, consider spark or a custom java program
Regards, Nitan Cell: 510 449 9629 > On Jan 16, 2020, at 10:26 PM, Ankit Gadhiya <ankitgadh...@gmail.com> wrote: > > > Any leads on this ? > > — Ankit > >> On Thu, Jan 16, 2020 at 8:51 PM Ankit Gadhiya <ankitgadh...@gmail.com> wrote: >> Hi Arvinder, >> >> Thanks for your response. >> >> Yes - Cluster B already has some data. Tables/KS names are identical ; for >> data - I still haven't got the clarity if it has identical data or no - I am >> assuming no since it's for different customers but need the confirmation. >> >> Thanks & Regards, >> Ankit Gadhiya >> >> >> >>> On Thu, Jan 16, 2020 at 8:49 PM Arvinder Dhillon <dhillona...@gmail.com> >>> wrote: >>> So as I understand, Cluster B already has some data and not an empty >>> cluster. >>> >>> When you say, clusters share same keyspace and table names, do you mean >>> both clusters have identical data on those ks/tables? >>> >>> >>> -Arvi >>> >>>> On Thu, Jan 16, 2020, 5:27 PM Ankit Gadhiya <ankitgadh...@gmail.com> wrote: >>>> Hello Group, >>>> >>>> I have a requirement in one of the production systems where I need to be >>>> able to migrate entire dataset from Cluster A (Azure Region A) to Cluster >>>> B (Azure Region B). >>>> >>>> Each cluster have 3 Cassandra nodes (RF=3) running used by different >>>> applications. Few of the applications are common is Cluster A and Cluster >>>> B thereby sharing same keyspace/table names. >>>> Need suggestion for the best possible migration strategy here considering >>>> - 1. No Application code changes possible - Minor config/infra changes can >>>> be considered. 2. Zero data loss. 3. No/Minimal downtime. >>>> >>>> It'd be great to hear ideas from all of you based on your experiences. >>>> >>>> Cassandra Version - Cassandra 3.0.13 on both sides. >>>> Total Data size - Cluster A: 70 GB, Cluster B: 15 GB >>>> >>>> Thanks & Regards, >>>> Ankit Gadhiya >>>> > -- > Thanks & Regards, > Ankit Gadhiya >
