Felix Gessert is the CEO and co-founder of the Backend-as-a-Service company Baqend. During his PhD studies at the University of Hamburg, he developed the core technology behind Baqend’s web performance service. Felix is passionate about making the web faster by turning research results into real-world applications. He frequently talks at conferences about exciting technology trends in data management and web performance. As a Junior Fellow of the German Informatics Society (GI), he is working on new ideas to facilitate the research transfer of academic computer science innovation into practice.Wolfram “Wolle” Wingerath is the leading data engineer at Baqend where he is responsible for data analytics and all things related to real-time query processing. During his PhD studies at the University of Hamburg, Wolle conceived the scalable design behind Baqend’s real-time query engine and thereby also developed a strong background in real-time databases and related technology such as scalable stream processing,NoSQL database systems, cloud computing, and Big Data analytics. Eager to connect with others and share his experiences, Wolle regularly speaks at developer and research conferences.Norbert Ritter is a full professor of computer science at the University of Hamburg, where he heads the databases and information systems group (DBIS). He received his PhD from the University of Kaiserslautern in 1997. His research interests include distributed and federated database systems, transaction processing, caching, cloud data management, information integration, and autonomous database systems. He has been teaching NoSQL topics in various courses for several years. Seeing the many open challenges for NoSQL systems, he, Wolle, and Felix have been organizing the annual Scalable Cloud Data Management Workshop to promote research in this area.

• Preface.- 1 Introduction.- 2 Latency in Cloud-Based Applications.- 3 HTTP for Globally Distributed Applications.- 4 Systems for Scalable Data Management.- 5 Caching in Research & Industry.- 6 Transactional Semantics.-7 Polyglot Persistence in Data Management.- 8 The NoSQL Toolbox: The NoSQL Landscape in a Nutshell.- 9 Summary & Future Trends.

Felix Gessert is the CEO and co-founder of the Backend-as-a-Service company Baqend. During his PhD studies at the University of Hamburg, he developed the core technology behind Baqend’s web performance service. Felix is passionate about making the web faster by turning research results into real-world applications. He frequently talks at conferences about exciting technology trends in data management and web performance. As a Junior Fellow of the German Informatics Society (GI), he is working on new ideas to facilitate the research transfer of academic computer science innovation into practice.Wolfram “Wolle” Wingerath is the leading data engineer at Baqend where he is responsible for data analytics and all things related to real-time query processing. During his PhD studies at the University of Hamburg, Wolle conceived the scalable design behind Baqend’s real-time query engine and thereby also developed a strong background in real-time databases and related technology such as scalable stream processing,NoSQL database systems, cloud computing, and Big Data analytics. Eager to connect with others and share his experiences, Wolle regularly speaks at developer and research conferences.Norbert Ritter is a full professor of computer science at the University of Hamburg, where he heads the databases and information systems group (DBIS). He received his PhD from the University of Kaiserslautern in 1997. His research interests include distributed and federated database systems, transaction processing, caching, cloud data management, information integration, and autonomous database systems. He has been teaching NoSQL topics in various courses for several years. Seeing the many open challenges for NoSQL systems, he, Wolle, and Felix have been organizing the annual Scalable Cloud Data Management Workshop to promote research in this area.

• Preface.- 1 Introduction.- 2 Latency in Cloud-Based Applications.- 3 HTTP for Globally Distributed Applications.- 4 Systems for Scalable Data Management.- 5 Caching in Research & Industry.- 6 Transactional Semantics.-7 Polyglot Persistence in Data Management.- 8 The NoSQL Toolbox: The NoSQL Landscape in a Nutshell.- 9 Summary & Future Trends.

Felix Gessert is the CEO and co-founder of the Backend-as-a-Service company Baqend. During his PhD studies at the University of Hamburg, he developed the core technology behind Baqend’s web performance service. Felix is passionate about making the web faster by turning research results into real-world applications. He frequently talks at conferences about exciting technology trends in data management and web performance. As a Junior Fellow of the German Informatics Society (GI), he is working on new ideas to facilitate the research transfer of academic computer science innovation into practice.Wolfram “Wolle” Wingerath is the leading data engineer at Baqend where he is responsible for data analytics and all things related to real-time query processing. During his PhD studies at the University of Hamburg, Wolle conceived the scalable design behind Baqend’s real-time query engine and thereby also developed a strong background in real-time databases and related technology such as scalable stream processing,NoSQL database systems, cloud computing, and Big Data analytics. Eager to connect with others and share his experiences, Wolle regularly speaks at developer and research conferences.Norbert Ritter is a full professor of computer science at the University of Hamburg, where he heads the databases and information systems group (DBIS). He received his PhD from the University of Kaiserslautern in 1997. His research interests include distributed and federated database systems, transaction processing, caching, cloud data management, information integration, and autonomous database systems. He has been teaching NoSQL topics in various courses for several years. Seeing the many open challenges for NoSQL systems, he, Wolle, and Felix have been organizing the annual Scalable Cloud Data Management Workshop to promote research in this area.

• Preface.- 1 Introduction.- 2 Latency in Cloud-Based Applications.- 3 HTTP for Globally Distributed Applications.- 4 Systems for Scalable Data Management.- 5 Caching in Research & Industry.- 6 Transactional Semantics.-7 Polyglot Persistence in Data Management.- 8 The NoSQL Toolbox: The NoSQL Landscape in a Nutshell.- 9 Summary & Future Trends.