From 52713ec309242352c3998c4eb0e665cb5b075d65 Mon Sep 17 00:00:00 2001 From: Donne Martin Date: Tue, 28 Feb 2017 05:06:15 -0800 Subject: [PATCH] Add Wide column store section --- README.md | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/README.md b/README.md index f0d3cd9..d714572 100644 --- a/README.md +++ b/README.md @@ -1113,3 +1113,26 @@ Document stores provide high flexibility and are often used for working with occ * [MongoDB architecture](https://www.mongodb.com/mongodb-architecture) * [CouchDB architecture](https://blog.couchdb.org/2016/08/01/couchdb-2-0-architecture/) * [Elasticsearch architecture](https://www.elastic.co/blog/found-elasticsearch-from-the-bottom-up) + +#### Wide column store + +

+ +
+ Source: SQL & NoSQL, a brief history +

+ +> Abstraction: nested map `ColumnFamily>` + +A wide column store's basic unit of data is a column (name/value pair). A column can be grouped in column families (analogous to a SQL table). Super column families further group column families. You can access each column independently with a row key, and columns with the same row key form a row. Each value contains a timestamp for versioning and for conflict resolution. + +Google introduced [Bigtable](http://www.read.seas.harvard.edu/~kohler/class/cs239-w08/chang06bigtable.pdf) as the first wide column store, which influenced the open-source [HBase](https://www.mapr.com/blog/in-depth-look-hbase-architecture) often-used in the Hadoop ecosystem, and [Cassandra](http://docs.datastax.com/en/archived/cassandra/2.0/cassandra/architecture/architectureIntro_c.html) from Facebook. Stores such as BigTable, HBase, and Cassandra maintain keys in lexicographic order, allowing efficient retrieval of selective key ranges. + +Wide column stores offer high availability and high scalability. They are often used for very large data sets. + +##### Source(s) and further reading: wide column store + +* [SQL & NoSQL, a brief history](http://blog.grio.com/2015/11/sql-nosql-a-brief-history.html) +* [Bigtable architecture](http://www.read.seas.harvard.edu/~kohler/class/cs239-w08/chang06bigtable.pdf) +* [HBase architecture](https://www.mapr.com/blog/in-depth-look-hbase-architecture) +* [Cassandra architecture](http://docs.datastax.com/en/archived/cassandra/2.0/cassandra/architecture/architectureIntro_c.html)