Data-Intensive Scalable Computing (DISC) file systems such as HDFS employs replication for reliability, typically delivering users with only about a third of the storage capacity of the raw disks. In this project, we investigate DiskReduce, a framework for integrating RAID into these replicated storage systems to lower storage capacity overhead, for example, from 200% to 25% when triplicated da...

The first generation of Data-Intensive Scalable Computing file systems such as Google File System and Hadoop Distributed File System employed n (n ≥ 3) replications for high data reliability, therefore delivering users only about 1/n of the total storage capacity of the raw disks. This paper presents DiskReduce, a framework integrating RAID into these replicated storage systems to significantly...

High energy physics experiments are currently recording large amounts of data and in a few years will be recording prodigious quantities of data. New methods must be developed to handle this data and make analysis at universities possible. We examine some techniques that exploit recent developments in commodity hardware. We report on tests of redundant arrays of integrated drive electronics (ID...

Energy-efficiency is becoming increasingly important for storage systems to reduce the total cost of ownership (TCO). In this paper, we propose an energy saving policy named eRAID for conventional disk based RAID-1 systems using redundancy. In particular, we develop a dynamic performance control scheme with the help of a performance predictor based on queueing network theory. Moreover, we discu...

RAID systems are fundamental components of modern storage infrastructures. It is therefore important to model their performance effectively. This paper describes a simulation model which predicts the cumulative distribution function of I/O request response time in a RAID 0 system consisting of homogeneous zoned disk drives. The model is constructed in a bottom-up manner, starting by abstracting...

Abstract Background The effect of personalised nutrition advice on discretionary foods intake is unknown. To date, two national classifications for have been derived. This study examined changes in and beverages following a intervention using these classifications. Methods Participants were recruited into 6-month RCT across seven European countries (Food4Me) randomised to receive generalised di...

Introduction: Video games affect the stress system and cognitive abilities in different ways. Here, we evaluated electrophysiological and biochemical indicators of stress and assessed their effects on cognition and behavioral indexes after playing a scary video game. Methods: Thirty volunteers were recruited into two groups as control and experimental. The saliva and blood samples were collect...

inflammatory bowel disease (ibd) is an irregular response of immune system accompanied with different inflammatory manifestations including alterations in cytokines. probiotics are non-pathogenic organisms with probable effects in various conditions such as inflammation. the present study hypothesized whether oral intake of bifidobacterium and lactobacillus in form of probiotic yogurt may repre...

The dual effects of larger die sizes and technology scaling, combined with aggressive voltage scaling for power reduction, increase the error rates for on-chip memories. Traditional on-chip memory reliability techniques (e.g., ECC) incur significant power and performance overheads. In this paper, we propose a low-power-and-performance-overhead Embedded RAID (E-RAID) strategy and present Embedde...