Introduction to DataStax Enterprise Advanced Replication with Apache Cassandra
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The document discusses DataStax's advanced replication, emphasizing its benefits over standard Cassandra replication, particularly in scenarios involving disconnected edge nodes and varying connectivity. Advanced replication allows for multiple edge clusters to replicate data to a central hub with support for consistent or sporadic connectivity and prioritized streams. It also facilitates active queries and analytics at both edge and hub clusters, making it suitable for industries like retail.
Introduction to DataStax Enterprise Advanced Replication with Apache Cassandra
- 1. DataStax Advanced Replication Brian Hess Sr. Product Manager, Analytics
- 2. Why Advanced Replication • Standard Cassandra replication has its limits • Lots of disconnected “edge” nodes/data centers/clusters • Replicating to central “mother ship” for aggregating • Inconsistent connectivity • All data centers are read-write – no read-only DCs 2© 2016 DataStax, All Rights Reserved.
- 3. What is Advanced Replication • Advanced Replication supports: • Many edge clusters replicating to a central hub • Consistent or sporadic connectivity – “store and forward” • Prioritized streams for limited bandwidth situations • One-way replication • Active queries at the edge, as well as replicating to the hub • Search/Analytics supported at edge and hub clusters 3© 2016 DataStax, All Rights Reserved.
- 4. Company Confidential “What was Brian’s average purchase per store this week?” Analytics Over All Data “What did Brian buy today across all stores?” Can Query Global Sales “What was the hottest product here this week?” Analytics of Local Sales “What did Brian buy here today?” Can Query Local Sales Each Store Central Hub Example: Retail Sales © 2016 DataStax, All Rights Reserved.
- 5. Company Confidential Key Verticals © 2016 DataStax, All Rights Reserved.
- 6. Architecture – Edge View 6 Client Edge Replication Log Collection Agent Table Replication Agent Hub Cluster Table © 2016 DataStax, All Rights Reserved.
- 7. Architecture – Edge View 7 Client Edge Replication Log Collection Agent Table Replication Agent Hub Cluster Table Normal CQL Operation CQL Trigger captures mutation Maintained in C* table for Fault Tolerance Pulls from Replication Log in priority/time order Replicates to Hub via normal CQL driver High Priority mutations opportunistically sent to Hub asynchronously © 2016 DataStax, All Rights Reserved.
- 8. Topology 8© 2016 DataStax, All Rights Reserved.