Design and Evaluation of Lifelog Mashup Platform with NoSQL Database
Kohei Takahashi, Shinsuke Matsumoto, Sachio Saiki, Masahide Nakamura · 2013
To support mashup of heterogeneous lifelog services, we have previously implemented the lifelog common data model (LLCDM). The previous LLCDM was implemented with MySQL, where various types of application-specific data (e.g., numeric values, text, JSON or XML) were all stored in a column in a schemaless text format. Any query with application-specific data had to be managed by individual applications. It had also a scalability issue as the data size grew.