ABSTRACT
This chapter explores the advancements and the new approaches of the web scale data management. It discusses the advantages and the disadvantages of several recently introduced approaches and their suitability to support a certain class of applications and end-users. The chapter presents some of the current challenges and open research problems to be tackled in order to improve the current state-of-the-art. The row keys are sorted in lexicographic order in Bigtable. Every single row key is an atomic unit of read or write. As a high-volume web site, reliability is essential to Amazon, because even the slightest breakdown can cause significant financial consequences and affect customer trust. Database-as-a-service is an emerging paradigm for data management in which a third party service provider hosts a database as a service. The chapter provides the main Not Only SQL systems, which has been introduced and internally used by three of the big players in the web scale data management domain: Google, Yahoo and Amazon.
