Key-Value Databases

Key-Value Databases

1. Key-Value Store

   • Primary-key access
   • Some database examples
     • Memcached
     • Redis
     • Riak
       • More than standard

2. Suitable use cases

   • Storing Session Information
     • Unique web session id
     • Single object
     • PUT request
     • GET request
   • User Profiles
     • Preferences
     • Single object
     • Unique user information
   • Shopping cart data
     • Group of shopping carts by user

3. When not to use

   • Related data
   • Multioperation transactions
     • No rollback
     • Single key operations only
   • Query by data
     • No value inspection
     • Exceptions
       • Riak Search
       • Solr
       • Lucene

4. Riak

   • Bucket
     • Namespace for keys
     • Decrease of key collisions
   • Storing aggregates
     • Single bucket
       • Probable key conflicts
     • Key_ObjectName as key
       • Individual objects
     • Specialized buckets
       • Domain buckets
       • Use of various buckets
       • Individual objects
       • Standard key