NoSQL Concepts, Redis, MongoDB, CouchDB Svetlin Nakov Telerik Software Academy academy.telerik.com Manager Technical Training
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 2
NoSQL Databases Overview, Models, Concepts, Examples
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”? 4
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 5
* 1 6 Name: Svetlin Nakov Gender: male Phone: Address: - Street: Al. Malinov 31 - Post Code: Town: Sofia - Country: Bulgaria Site: Document Model Relational Model * 1 * 1 Name Svetlin Nakov Gendermale Phone Sitewww.nakov.com CountryBulgaria Street Al. Malinov 31 Post Code 1729 TownSofia
Ultra-Fast Data Structures Server
Redis is Ultra-fast in-memory key-value data store Powerful data structures server Open-source software: Redis stores data structures: Strings Lists Hash tables Sets / sorted sets 8
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 Redis To Go 5 MB free non-persistent Redis instance 9
ServiceStack.Redis API github.com/ServiceStack/ServiceStack.Redis github.com/ServiceStack/ServiceStack.Redis Sample C# code: 10 string redisHost = "redis.garantiadata.com"; int redisPort = 14233; string redisPass = using (var redisClient = new RedisClient(redisHost, redisPort, redisPass)) new RedisClient(redisHost, redisPort, redisPass)){ string key = "username"; string key = "username"; string value = "nakov"; string value = "nakov"; redisClient.Set (key, value); redisClient.Set (key, value); Console.WriteLine(redisClient.Get (key)); Console.WriteLine(redisClient.Get (key));}
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Mature and Very Powerful NoSQL Database
MongoDB – 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 13
MongoLab Free 0.5 GB instance MongoHQ Free 0.5 GB instance (sandbox) MongoOd Free 100 MB instance
15 The official MongoDB C# driver from 10 gen github.com/mongodb/mongo-csharp-driver github.com/mongodb/mongo-csharp-driver Sample C# code: var connectionStr = var client = new MongoClient(connectionSt); var server = client.GetServer(); var db = server.GetDatabase("mongodb-name"); var persons = db.GetCollection ("Persons"); persons.Insert (new Person(…)); var resultPersons = from p in persons.AsQueryable () from p in persons.AsQueryable () where p.Address.Town == "Sofia" where p.Address.Town == "Sofia" select p; select p;
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JSON-based Document Database with RESTful API
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 tolerant 18
Cloudant Managed CouchDB instances in the cloud Free $5 account – unclear what this means Has nice web-based administration UI 19
20 Many CouchDB C# APIs github.com/soitgoes/LoveSeat github.com/soitgoes/LoveSeat Sample C# code: var client = new CouchClient( dbHost, dbPort, dbUsername, dbPassword, dbHost, dbPort, dbUsername, dbPassword, false, AuthenticationType.Cookie); false, AuthenticationType.Cookie); var db = client.GetDatabase("some-db"); db.CreateDocument(new Person() { Name = "Svetlin Nakov", Name = "Svetlin Nakov", = =
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1. Register for a free Cloudant account at 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
3. Implement the previous task ("Dictionary") with Redis Register for a free "Redis To Go" account at: Download the client libraries for your favorite programming language from Implement the previous task ("Dictionary") with MongoDB (register at MongoLab or MongoHQ) 24
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