mongo db

gistfile1.txt

http://www.10gen.com/video/mongosv2010/intro

mongo - shell
mongod, mongos - db w/ sharding

db has collection of documents

bson for fast scanability - think 2mb json string
bson can store binary data (no need to do base64)

namespace -- fully qualified db name & collection name

_id => unique id in system; server can create (12-bytes)
guid can be stored as byte-array

documents - doesn't have to have same fields; & fields
can have diff data types

LIKE sql -- give regex

no JOINs, no complex TRANSACTIONs

atomic on single documents -- strong consistency

query: { a: { $gt: 10 } }
advanced querys

GridFS store large documents

pull down & update parts of documents

update if present, else insert

no rollbacks - hard to scale out