MapReduce join strategies for key-value storage

This paper analyses MapReduce join strategies used for big data analysis and mining known as map-side and reduce-side joins. The most used joins will be analysed in this paper, which are theta-join algorithms including all pair partition join, repartition join, broadcasting join, semi join, per-split semi join. This paper can be considered as a guideline for MapReduce application developers for the selection of join strategies. The analysis of several join strategies for big data analysis and mining is accompanied by comprehensive examples.