Home » Tag Archives: NoSQL (page 7)

Tag Archives: NoSQL

CouchDB – Relax

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Introduction Apache CouchDB, commonly referred to as CouchDB, is an open source database that focuses on ease of use and on being “a database that completely embraces the web”. It is a NoSQL database that uses JSON to store data, JavaScript as its query language using MapReduce and HTTP for an API. One of its distinguishing features is multi-master replication. ...

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Amazon DynamoDB

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Introduction Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. Amazon DynamoDB automatically spreads the data and traffic for the table over a sufficient number of servers to handle the request capacity specified by the customer and the amount of data stored, while maintaining consistent and fast performance. All data items ...

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Redis as data store: Installation

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Introduction Redis is open-source, advanced key-value data store server. It is counted as Nosql database for the key-value store category. It is more than just the cache server. It is more of data structure server as it supports data units as lists, sets, hashes and sorted set and It is very blazing fast in terms of performance. In this first ...

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ReSQL?

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The NoSQL moniker that was coined circa 2009 marked a move from the “traditional” relational model. There were quite a few non-relational databases around prior to 2009, but in the last few years we’ve seen an explosion of new offerings (you can see,for example, the “NoSQL landscape” in a previous post I made). Generally speaking, and everything here is a wild ...

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MongoDB Pro Tip: Field Projections

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Did you ever learn that select * from table in RDBMS-land is bad? Of course, you did! If you’re only looking for the email address of a user and not the other 15 columns worth of data, then why ask for that data and incur a penalty? The query select email from user where user_id = 1; is far more ...

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MongoDB Geo-Spatial Mobile Demo

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Mongo: noun (pl mongo or mongos) – a monetary unit of Mongolia. Equal to one hundredth of a tugrik. Origin from Mongolian “silver” I’ve written about NoSQL DBMS [http://keyholesoftware.com/2012/10/01/is-nosql-the-sql-sequel/]. We know that there are several categories of NoSQL DBMS. MongoDB is a scalable NoSQL document-oriented data store that has built-in geo-spatial indexing. Let’s look at its characteristics and then check ...

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Practical NoSQL experiences with Apache Cassandra

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Most of the backend systems I’ve worked with over the years have employed relational database storage in some role. Despite many application developers complaining about RDBMS performance, I’ve found that with good design and implementation a relational database can actually scale a lot further than developers think. Often software developers who don’t really understand relational databases tend to blame the ...

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SQL to NoSQL : Copy your data from MySQL to Couchbase

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Introduction During my last interactions with the Couchbase community, I had the question how can I easily import my data from my current database into Couchbase. And my answer was always the same: Take an ETL such as Talend to do it Just write a small program to copy the data from your RDBMS to Couchbase… So I have written ...

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Setup MongoDB Replica Set in 4 steps

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Introduction Before going into details of configuring MongoDB replica sets, let me give brief details about same: Replica Set is the feature provided by the Mongodb database to achieve high availability and automatic failover. It is kinda traditional master-slave configuration but have capability of automatic failover. It is basically group/cluster of the mongod instances which communicates, replicates to each other ...

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Making Sense Out of Datomic, The Revolutionary Non-NoSQL Database

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I have finally managed to understand one of the most unusual databases of today, Datomic, and would like to share it with you. Thanks to Stuart Halloway and his workshop! Why? Why?!? As we shall see shortly, Datomic is very different from the traditional RDBMS databases as well as the various NoSQL databases. It even isn’t a database – it ...

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