It is widely understood that most downtime is accounted for by programming errors and administration time. However, recent work has indicated an increasing cause of downtime may stem from transient hardware errors caused by external factors, such as cosmic rays. Moving to denser semiconductor technologies at lower voltages will cause an increase in transient errors. We investigate the trends in...

38 Computer P u b l i s h e d b y t h e I E E E C o m p u t e r S o c i e t y puters too unreliable for application scientists to use. Unfortunately, building exotic cooling facilities can cost as much as the supercomputer itself, and operating and maintaining the facilities costs even more. As “The Energy-Efficient Green Destiny” sidebar details, the low-power supercomputer that we developed w...

Nowadays, by successful application of on time production concept in other concepts like production management and storage, the need to complete the processing of jobs in their delivery time is considered a key issue in industrial environments. Unrelated parallel machines scheduling is a general mood of classic problems of parallel machines. In some of the applications of unrelated parallel mac...

the conventional tunneling procedures for example drilling, charging, blasting, loading and supporting, are highly developed. new tunneling machines have recently come into operation and others are under construction or development. impactors are used in large numbers in the coal mining industry. face-heading machines are successfully used in new tunneling procedures in both soft and medium-har...

Abstract An antifragile system of software and stakeholders, including designers, developers, operators, learn from incidents how to avoid outages maintain high uptime. This tutorial article reviews design operate such socio-technical systems with antifragility downtime. It documents the importance four principles two operational by exploring polar opposite anti-principles interplay between ant...

The growing popularity of cloud computing as a platform for deploying internet scale applications has seen a large number of web applications being deployed in the cloud. These applications (or tenants) are typically characterized by small data footprints, different schemas, and variable load patterns. Scalable multitenant database management systems (DBMS) running on a cluster of commodity ser...