JUST: Large-Scale Multi-Tier Storage Infrastructure at the Jülich Supercomputing Centre

Storage Infrastructure Behind Facebook Messages: Using HBase at Scale

Facebook Messages, which combines messages, chat and email into a real-time conversation, is the first application in Facebook to use HBase in production. In this article, we will discuss why we chose HBase for this use case, the early improvements we did to make HBase production ready, engineering and operational challenges encountered along the way, and the continued work we have had to do on...

Large Scale Infrastructure Systems

HTCaaS: Leveraging Distributed Supercomputing Infrastructures for Large-Scale Scientific Computing

In this paper, we present the HTCaaS (High-Throughput Computing as a Service) which aims to provide researchers with ease of exploring large-scale and complex scientific problems by leveraging national supercomputing infrastructures in Korea. HTCaaS allows users to efficiently submit a large number of jobs at once by effectively managing and exploiting of all available computing resources. HTCa...

Multi-tier Shuttle-based Storage and Retrieval Systems

In this paper analytical travel time model for the computation of cycle times and throughput performance of the multi-tier shuttle-based storage and retrieval system, is presented. The proposed model considers the real operating characteristics of the shuttle carrier and the elevators lifting table. Assuming uniform distributed storage locations and the probability theory, expressions for the e...

Multi-tier Grid Routing to Mobile Sink in Large-scale Wireless Sensor Networks

Improving the efficiency of data dissemination algorithms and protocols to mobile sink remains as an interesting research and engineering issue, especial for large-scale wireless sensor network. As the node energy and resources are limited, theses protocols should meet energyefficiency, low delay and high delivery ratio requirements. Although an energy-efficient dissemination tree (d-tree) can ...