Why NoSQL?

Why NoSQL?

1. Impedance Mismatch

   • Relational model
     • Simple structures
   • In-memory data structures
     • Complex structures
       • Lists
   • Translation
     • Mapping patterns

2. Application and Integration Databases

   • Application database
     • Access
       • Through one application
     • Database selection
   • Integration tool
     • Relational database
       • SQL
     • Web services
       • Complex data structures
       • Protocols
         • HTTP
         • Binary protocols
   • Advantages vs disadvantages
     • Disadvantages
       • Complex requirements
       • Needs extra coordination
     • Advantages
       • Communication quality

3. The Emergence of NoSQL

   • Carlo Strozzi
     • ASCII files
     • Shell scripts
   • NoSQL Meetup
     • Run on clusters*
     • Open source
     • No schema
     • Nonrelational
     • Distributed

4. Attack of the Clusters

   • Increase of
     • Services
     • Users
     • Tracking activity
   • Management of high data traffic
     • Bigger machines
     • Many small machines
       • Cluster
         • Experiencing difficulties
           • Relational databases
         • Success
           • Amazon - Dynamo
           • Google - BigTable