LH*RS: A Highly Available Distributed Data Storage

Design and Implementation of LH*RS: a Highly Available Distributed Data Storage System

The ideal storage system is always available and is incrementally expandable. Existing storage systems are far from this ideal. Affordable computers and high-speed networks allow us to investigate storage architectures that bring us closer to the ideal storage system. We describe a prototype implementation of the highly available scalable distributed data structure LH*RS. The scheme allows to r...

Power Control Center Applications using Highly Available Distributed RAM (HADRAM)

With on-going deregulation, with tighter interdependence between energy providers, and with growing demands on reliability, Power Control Centers (PCC) need to both scale up and to allow access to comprehensive real-time data. In this paper, we propose to build PCCs based on geographically distributed and tightly coupled clusters of heterogeneous computer clusters. Our proposal, Highly Availabl...

LH* Schemes with Scalable Availability

Modern applications increasingly require scalable, highly available and distributed storage systems. High-availability schemes typically deliver data despite up to n ≥ 1 simultaneous unavailabilities of the storage nodes (disks, processors with storage, or entire computers), where n is fixed. Such schemes are insufficient for scalable files, since the probability of more than n failures increas...

Lh*rs p2p : une nouvelle structure de données distribuée et scalable pour les environnements Pair à Pair. (Lh*rsp2p : a new scalable and distributed data structure for Peer to Peer environnements)

A Solution to the Network Challenges of Data Recovery in Erasure-coded Distributed Storage Systems: A Study on the Facebook Warehouse Cluster

Erasure codes, such as Reed-Solomon (RS) codes, are being increasingly employed in data centers to combat the cost of reliably storing large amounts of data. Although these codes provide optimal storage efficiency, they require significantly high network and disk usage during recovery of missing data. In this paper, we first present a study on the impact of recovery operations of erasure-coded ...