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In a WSN, sink-node gathers data from surrounding nodes and sends it to outside world via a gateway. Therefore, its location information is important to both attacker and network operator. The former can launch attacks on a sink-node to steal information or damage it, while the latter must hide its location to ensure data's safety, and physical protection. Providing sink-node location information...
In modern RAID-structured storage systems, reliability is guaranteed by the use of parity blocks. But the parity-update overheads upon each write request have become a performance bottleneck of RAID systems. In some ways, an attached log disk is used to improve the write performance by delaying the parity blocks update. However, these methods are data-block-oriented and they need more time to rebuild...
Shingled write disk (SWD) is a new kind of HDD, which increases areal density by adopting SMR technology. In the hybrid storage system consisting of SSDs and SWDs, there are some special characteristics such as large performance gap between SSDs and SWDs. In this paper we explore how to efficiently combine the advantages of SSDs and SWDs together. We propose Apas, an application aware hybrid storage...
The emergence of big data needs more and more storage capacity, and hard disk drive (HDD) plays a very important role in storage supplying. However, because of super paramagnetic effect, the growth of the areal density of HDD will quickly reach the limitation of 1Tb/in2. Shingled magnetic recording (SMR) is one of the most promising technologies to improve the areal density. In this paper, we have...
Both physical disk failure and logical errors such as software error, user abuse and virus attacks may cause data lose. The risk of logical errors is far greater than physical disk failure. Moreover, existing RAID solution cannot satisfy the reliability requirement in face of the logical errors in data centers. It is therefore becoming increasingly important for RAID-based storage systems to be able...
The RAID6 provides high reliability using double-parity-update at cost of high write penalty. In this paper, we propose HRAID6ML, a new logging architecture for RAID6 systems for enhanced energy efficiency, performance and reliability. HRAID6ML explores a group of Solid State Drives (SSDs) and Hard Disk Drives (HDDs): Two HDDs (parity disks) and several SSDs form RAID6. The free space of the two parity...
With data amount growing at an ever increasing rate, file system, as the basis of data management, its functionality and content are becoming more and more complex. Thus the file system is forced to be upgraded constantly, in order to satisfy the growing demands. However, the reinvention of new file systems is always a high-cost task. Although there are frameworks such as User-space File System that...
A single flash-based Solid State Drive (SSD) can not satisfy the capacity, performance and reliability requirements of a modern storage system supporting increasingly demanding data-intensive computing applications. Applying RAID schemes to SSDs to meet these requirements, while a logical and viable solution, faces many challenges. In this paper, we propose a Hybrid Parity-based Disk Array architecture,...
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