George Sigletos <sigle...@textkernel.nl> writes: > Hello, > > We had a similar problem where we needed to migrate data from one cluster > to another. > > We ended up using Spark to accomplish this. It is fast and reliable but > some downtime was required after all. > > We minimized the downtime by doing a first run, and then run incremental > updates. >
How much data are you talking about? How did you achieve incremental run? We are using kairosdb and some of the other schemas does not have a way to filter based on date. Thanks and Regards Noorul > Kind regards, > George > > > > On Mon, Dec 21, 2015 at 10:12 AM, Noorul Islam K M <noo...@noorul.com> > wrote: > >> >> Hello all, >> >> We have two clusters X and Y with same keyspaces but distinct data sets. >> We are planning to merge these into single cluster. What would be ideal >> steps to achieve this without downtime for applications? We have time >> series data stream continuously writing to Cassandra. >> >> We have ruled out export/import as that will make us loose data during >> the time of copy. >> >> We also ruled out sstableloader as that is not reliable. It fails often >> and there is not way to start from where it failed. >> >> Any suggestions will help. >> >> Thanks and Regards >> Noorul >>
