317An Overview of the NoSQL World
9.7 DISCUSSION AND CONCLUSIONS
For more than a quarter of a century, the relational database management systems
(RDBMS) have been the dominant model for database management. They provide
an extremely attractive interface for managing and accessing data and have proven to
be wildly successful in many nancial, business, and Internet applications. However,
with the new trends of web-scale data management, they started to suffer from some
serious limitations [28]:
• Database systems are difcult to scale. Most database systems have hard
limits beyond which they do not easily scale. Once users reach these scal-
ability limits, time consuming and expensive manual partitioning, data
migration, and load balancing ...