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The delay upper-bound analysis problem is of fundamental importance to real-time applications in Network-on-Chips (NoCs). In the paper, we revisit two state-of-the-art analysis models for real-time communication in wormhole NoCs with priority-based preemptive arbitration and show that the models only support specific router architectures with large buffer sizes. We then propose an extended analysis...
This paper proposes a new SSD cache architecture, DEFT-cache, Delayed Erasing and Fast Taping, that maximizes I/O performance and reliability of RAID storage. First of all, DEFT-Cache exploits the inherent physical properties of flash memory SSD by making use of old data that have been overwritten but still in existence in SSD to minimize small write penalty of RAID5/6. As data pages being overwritten...
Over the past few years, NAND flash-based Solid State Drives (SSDs) are progressively replacing Hard Disk Drives (HDDs) in various applications ranging from personal computers to large-scale storage servers, due to their high performance and low power consumption. However, SSDs suffer from limited endurance, which is a major concern for their utilization in the server domain. Based on the unique characteristics...
Cloud computing is an elastic computing model whereby users can lease computing and storage resources on demand from a remote infrastructure. Cloud computing is gaining popularity due to its low cost, high reliability and wide availability. However, a serious impediment to its wider deployment is the relative lack of effective data management services. The relatively slow access to persistent data...
In this paper we describe the evolutionary storage system which could adjust its storage strategy automatically according to the current running environment. In the evolutionary processes, ESS could automatically choose one system organizing strategy which fits for the current running environment best, to keep the dynamic balance of the whole storage system. One of the three evolutionary ways is data...
This paper presented the design and implement of snapshots device driver in Linux. Our implement was carried out at the block level as the device driver. It is available to all file systems and databases. We used industry standard benchmark to measure the performance and uncovered many important performance characteristics.
To protect data and recover data in case of failures, Linux operating system has built-in MD device that implements RAID architectures. Such device can recover data in case of single hardware failure among multiple disks. But it cannot recover data that were damaged by human errors, virus attack, and disastrous failures. In this paper, we present an implementation of a device driver that is capable...
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