Why NoSQL Makes Sense

Aug 25, 2011Download as PPTX, PDF3 likes322 views

The document discusses NoSQL databases and when they may be preferable to traditional SQL databases. It notes that NoSQL databases are non-relational, support horizontal scaling, and allow for new data models that can improve application development flexibility. Examples showing data structures and queries in MongoDB are provided. The document also summarizes pros and cons of different database types from 2000-2010.

Why NoSQL Makes Senseand when to use something else?Dwight Merriman / 10gen / MongoDB

The Scaling ImperativeIt already was needed but now...

cloudcommodityhttp://www.globalnerdy.com/2007/09/07/multicore-musings/

NoSQL = Non-relational next generation operation data stores and databasesno joins +light transactional semantics = horizontally scalable architectures

Scaling Outdistribution & query modelsConsistent hashingOrder preserving range chunkingScatter gather

Data modelsno joins +light transactional semantics = horizontally scalable architecturesImportant side effect : new data models = improved ways to develop apps (“Agility”)

${ _id : ObjectId("4e2e3f92268cdda473b628f6"),title : “Too Big to Fail”,when : Date(“2011-07-26”),author : “joe”,text : “blah”}$

${ _id : ObjectId("4e2e3f92268cdda473b628f6"),title : “Too Big to Fail”,when : Date(“2011-07-26”),author : “joe”,text : “blah”,tags : [“business”, “news”, “north america”],votes : 3,voters : [“dmerr”, “sj”, “jane” ],comments : [{ by : “tim157”, text : “great story” },{ by : “gora”, text : “i don’t think so” },{ by : “dmerr”, text : “also check out...” }]}$

the db space 2000 - 2010+ great for complex transactions+ great for tabular data+ ad hoc queries easy- O<->R mapping hard- speed/scale challenges- not super agile+ ad hoc queries easy+ SQL gives us a standard protocol for the interface between clients and servers+ scales horizontally better than operational dbs. some scale limits at massive scale- schemas are rigid- real time is hard; very good at bulk nightly data loads

the db space+ fits OO programming well+ agile+ speed/scale- querying a little less add hoc- not super transactional- not sql

ThanksDwight MerrimanCEO 10genhttp://blog.mongodb.org/@mongodbme - @dmerrjobs@10gen.comwww.mongodb.orgwww.mongodb.org/display/DOCS/Events

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