Hi Upasana, Thanks for your response. I’d love to do that as a first strategy but since they are both separate clusters , how would I do that? Keyspaces already have networktopologystrategy with RF=3.
— Ankit On Fri, Jan 17, 2020 at 8:45 AM Upasana Sharma <028upasana...@gmail.com> wrote: > Hi, > > Did you consider adding Cassandra nodes from cluster B, into cluster A as > a different data center ? > > Your keyspace would than be on Network topology data strategy. > > In this case, all data can be synced between both data centers by > Cassandra using rebalancing. > > > At client/application level you will have to ensure local quorum/ local > consistency so that there is no impact on latencies. > > Once you have moved data applications to new cluster , you can then remove > the old data center (cluster A), and cluster B would have fresh data. > > > > > On Fri, Jan 17, 2020, 6:59 PM Ankit Gadhiya <ankitgadh...@gmail.com> > wrote: > >> Thanks but there’s no DSE License. >> Wondering how sstableloader will help as some oh the Keyspace and tables >> names are same. Also how do i sync few system keyspaces. >> >> >> Thanks & Regards, >> Ankit >> >> On Fri, Jan 17, 2020 at 1:11 AM Vova Shelgunov <vvs...@gmail.com> wrote: >> >>> Loader* >>> >>> https://www.datastax.com/blog/2018/05/introducing-datastax-bulk-loader >>> >>> On Fri, Jan 17, 2020, 09:09 Vova Shelgunov <vvs...@gmail.com> wrote: >>> >>>> DataStax bulk loaded can be an option if data is large. >>>> >>>> On Fri, Jan 17, 2020, 07:33 Nitan Kainth <nitankai...@gmail.com> wrote: >>>> >>>>> 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* >>>>> >>>>> -- >> *Thanks & Regards,* >> *Ankit Gadhiya* >> >> -- *Thanks & Regards,* *Ankit Gadhiya*
