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Moving from Cassandra to Scylla via Apache Spark: The Scylla Migrator

• PeterCorless 8y ago
  Related Github repo is here: https://github.com/scylladb/scylla-migrator https://github.com/scylladb/scylla-migrator
• rkwasny 8y ago
  If the sstable format is compatible why not just copy sstables?
  • TomerSan 8y ago
    THink about different sstable versions compatibility (older C* to newer Scylla and vise versa). THere are cases where just copying the sstables will not work.
  • glommer 8y ago
    Due to the way Cassandra and Scylla works, the SSTables contain a specific token range and each node is responsible for a part of the token range. sstable copying is possible, but the two clusters must have the exact same topology, with the exact number of nodes, and each node pre-configured to have the exact same tokens in their ownership. That's rarely the case in practice. When it is, we always recommend copying SSTables.