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+# Non-Scalar Data
+
+## Redis sets SSAD
+
+- key binding - safe string
+- sets of data
+- taggable
+
+## Document data stores
+- Usually JSON
+- Richer
+- MongoDB - single master
+- CouchDB - multi master
+- ES - text search index
+
+## MongoDB
+- pecl/mongodb
+- mongodb/mongodb
+
+docs are PHP objects or assoc arrays
+
+## Relational Database
+- normalisation
+
+- postgres
+    - HSTORE
+    - JSON/JSONB
+
+
+# Querying data
+
+Sets - SISMEMBER and SMEMBER
+-  Aggregations
+- buckets
+- postgres - non standard
+
+## Redis
+- Can add to sets
+- Atomic
+- fast
+- counters
+
+DONT: RETRIVE MANIPULATE STORE
+
+ Do we do this at d3R?
+
+ redis bad at scaling
+
+ joned.in/25887 
+
+
+# Useful links
 https://redis.io/commands/sadd
 https://www.postgresql.org/docs/9.1/hstore.html
 https://wiki.openstreetmap.org/wiki/PostgreSQL