NoSQL DatabasesNoSQL Concepts, Redis, MongoDB, CouchDB
Svetlin Nakov
Telerik Software Academyacademy.telerik.com
Manager Technical Traininghttp://www.nakov.com
http://schoolacademy.telerik.com
Table of Contents NoSQL Databases Overview Redis
Ultra-fast data structures server Redis Cloud: managed Redis
MongoDB Powerful and mature NoSQL
database MongoLab: managed MongoDB in
the cloud CouchDB
JSON-based document database with REST API
Cloudant: managed CouchDB in the cloud
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What is NoSQL Database?
NoSQL (cloud) databases Use document-based model (non-
relational) Schema-free document storage
Still support indexing and querying Still support CRUD operations
(create, read, update, delete) Still supports concurrency and
transactions Highly optimized for append /
retrieve Great performance and scalability NoSQL == “No SQL” or “Not Only
SQL”?
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Relational vs. NoSQL Databases
Relational databases Data stored as table rows Relationships between related rows Single entity spans multiple tables RDBMS systems are very mature,
rock solid NoSQL databases
Data stored as documents Single entity (document) is a single
record Documents do not have a fixed
structure
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Relational vs. NoSQL Models
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Name: Svetlin NakovGender: malePhone: +359333777555Address: - Street: Al. Malinov 31 - Post Code: 1729 - Town: Sofia - Country: BulgariaEmail: [email protected]: www.nakov.com
Document ModelRelational Model
*1
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Name Svetlin Nakov
Gender malePhone +359333777
555Email nakov@abv.
bgSite www.nakov.
com
Country Bulgaria
Street Al. Malinov 31
Post Code
1729
Town Sofia
What is Redis? Redis is
Ultra-fast in-memory key-value data store
Powerful data structures server Open-source software:
http://redis.io Redis stores data structures:
Strings Lists Hash tables Sets / sorted sets
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Hosted Redis Providers Redis Cloud
Fully managed Redis instance in the cloud
Highly scalable, highly available Free 1 GB instance, stored in the
Amazon cloud Supports data persistence and
replication http://redis-cloud.com
Redis To Go 5 MB free non-persistent Redis
instance http://redistogo.com
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C# API for Redis ServiceStack.Redis API
github.com/ServiceStack/ServiceStack.Redis
Sample C# code:
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string redisHost = "redis.garantiadata.com";int redisPort = 14233;string redisPass = "some@pass0rd";using (var redisClient = new RedisClient(redisHost, redisPort, redisPass)){ string key = "username"; string value = "nakov"; redisClient.Set<string>(key, value); Console.WriteLine(redisClient.Get<string>(key));}
What is MongoDB? MongoDB – http://mongodb.org
Very powerful and mature NoSQL database
Scalable, high-performance, open-source
JSON-style document storage, schemaless
Replication & high-availability support
Auto sharding – clustering & data partitioning
Indexing and powerful querying Map-Reduce – parallel data
processing GridFS – store files of any size
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Hosted MongoDB Providers
MongoLab Free 0.5 GB instance https://mongolab.com
MongoHQ Free 0.5 GB instance (sandbox) https://www.mongohq.com
MongoOd Free 100 MB instance https://www.mongood.com
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C# API for MongoDB
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The official MongoDB C# driver from 10gen github.com/mongodb/mongo-csharp
-driver Sample C# code:var connectionStr =
"mongodb://user:pass@server:part";var client = new MongoClient(connectionSt);var server = client.GetServer();var db = server.GetDatabase("mongodb-name");var persons = db.GetCollection<Person>("Persons");persons.Insert<Person>(new Person(…));var resultPersons = from p in persons.AsQueryable<Person>() where p.Address.Town == "Sofia" select p;
What is CouchDB? Apache CouchDB
Open-source NoSQL database Document-based: stored JSON
documents HTTP-based API Query, combine, and transform
documents with JavaScript On-the-fly document transformation Real-time change notifications Highly available and partition
tolerant18
Hosted CouchDB Providers
Cloudant Managed CouchDB instances in the
cloud Free $5 account – unclear what this
means https://cloudant.com Has nice web-based administration
UI
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C# API for CouchDB
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Many CouchDB C# APIs github.com/soitgoes/LoveSeat
Sample C# code:var client = new CouchClient( dbHost, dbPort, dbUsername, dbPassword, false, AuthenticationType.Cookie);var db = client.GetDatabase("some-db");db.CreateDocument(new Person() { Name = "Svetlin Nakov", Email = "[email protected]"});
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Questions?
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NoSQL Databases
http://academy.telerik.com
Exercises1. Register for a free Cloudant account at
https://cloudant.com.2. Write a simple "Dictionary" application
in C# or JavaScript to perform the following in Cloudant: Add a dictionary entry (word +
translation) List all words and their translations Find the translation of given word
The UI of the application is up to you (it could be Web-based, GUI or console-based).You may download a Cloudant client library from http://wiki.apache.org/couchdb/Related_Projects
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Exercises (2)3. Implement the previous task
("Dictionary") with Redis Register for a free "Redis To Go" account
at: https://redistogo.com Download the client libraries for your
favorite programming language from http://redis.io/clients
4. Implement the previous task ("Dictionary") with MongoDB (register at MongoLab or MongoHQ)
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