Schema changes in a NoSQL Data Store

Schema changes in a NoSQL Data Store

1. Incremental Migration

   • New code
     • Parses existing data
   • Recommendations
     • Short transition period
       • New changes
       • Last migrated object
     • Schema version field
       • Lastest data version
     • Use of translation layer
   • Mobile apps
     • Use of all versions

2. Migrations in Graph Databases

   • Graph Database
     • Edges
       • Types
         • Modification
           • No graph traversing
       • Properties
   • Techniques
     • Traversing and chaging
       • Expensive
     • Creating and dropping
       • Create new edge
       • Drop old edge
       • Backward compatibility
     • Traversals
       • Traversing the graph
         • Old edges
         • New edges
       • High availability