Hi all, We're migrating from a Cassandra based JPA adapter to Amazon's RDS. In order to do this, we want a no downtime migration. To do this, we would need the following flow.
1) Start writing to both systems. Cassandra is still the authoritative record, and records are replicated to RDS. All queries will still be served from Cassandra on read. 2) In the background, read all records from Cassandra and write them to RDS. Use update timestamps to ensure we don't overwrite newly updated data. 3) Switch our read path (probably with a new deployment configured to only read from RDS) I've been looking at the Slices documentation, and it seems like defining a Data Replication Policy will perform the dual writes I need in steps 1) and 2). Does anyone have any experience with using the policy in this manner? Thanks in advance, Todd
