@@ -1931,6 +1931,22 @@ <h1>NoSQL Data Stores</h1>
19311931</ ol >
19321932< p > These persistent data storage representations are commonly used to augment,
19331933rather than completely replace, relational databases.</ p >
1934+ < h2 > Key-value Pair</ h2 >
1935+ < p > Key-value pair data stores are based
1936+ on < a href ="http://en.wikipedia.org/wiki/Hash_table "> hash map</ a > data structures.</ p >
1937+ < h3 > Key-value pair data stores</ h3 >
1938+ < ul >
1939+ < li > < a href ="http://redis.io/ "> Redis</ a > is an open source in-memory key-value pair data
1940+ store. Redis is often called "the Swiss Army Knife of web application
1941+ development." It can be used for caching, queuing, and storing session data
1942+ for faster access than a traditional relational database, among many other
1943+ use cases.</ li >
1944+ </ ul >
1945+ < h3 > Key-value pair resources</ h3 >
1946+ < ul >
1947+ < li > "< a href ="https://www.digitalocean.com/community/tutorials/how-to-install-and-use-redis "> How To Install and Use Redis</ a > "
1948+ is a guide for getting up with the extremely useful in-memory data store.</ li >
1949+ </ ul >
19341950< h2 > Document-oriented</ h2 >
19351951< p > A document-oriented database provides a semi-structured representation for
19361952nested data. </ p >
@@ -1956,22 +1972,6 @@ <h3>Document-oriented data store resources</h3>
19561972< li > < a href ="http://www.optinidus.com/blogs/guide-to-mongodb-for-startups/ "> MongoDB for startups</ a >
19571973 is a guide about using non-relational databases in green field environments.</ li >
19581974</ ul >
1959- < h2 > Key-value Pair</ h2 >
1960- < p > Key-value pair data stores are based
1961- on < a href ="http://en.wikipedia.org/wiki/Hash_table "> hash map</ a > data structures.</ p >
1962- < h3 > Key-value pair data stores</ h3 >
1963- < ul >
1964- < li > < a href ="http://redis.io/ "> Redis</ a > is an open source in-memory key-value pair data
1965- store. Redis is often called "the Swiss Army Knife of web application
1966- development." It can be used for caching, queuing, and storing session data
1967- for faster access than a traditional relational database, among many other
1968- use cases.</ li >
1969- </ ul >
1970- < h3 > Key-value pair resources</ h3 >
1971- < ul >
1972- < li > "< a href ="https://www.digitalocean.com/community/tutorials/how-to-install-and-use-redis "> How To Install and Use Redis</ a > "
1973- is a guide for getting up with the extremely useful in-memory data store.</ li >
1974- </ ul >
19751975< h2 > Column-family table</ h2 >
19761976< p > A the column-family table class of NoSQL data stores builds on the key-value
19771977pair type. Each key-value pair is considered a row in the store while the
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