FRINK Linked Data Fragments server

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• W3207704595 abstract "Nowadays, Solid State Drive (SSD) arrays have been widely used in commercial big data centers and high-performance storage services. Meanwhile, in the era of explosive data growth, data centers need to implement the array scaling schemes to meet the increasing storage capacity requirements. The existing state-of-the-art scaling methods, such as Round-Robin (RR) and FastScale, aim at ensuring a uniform data redistribution. However, most of them are designed for Hard Disk Drive (HDD) arrays, ignoring lifetime difference among extended and former-used disks, which leads to several additional penalties in SSD arrays. Furthermore, due to the sudden interdisk lifetime disparity, the extended SSD disks trigger frequently wear-leveling operations for controlling the wearing balance into the predefined threshold. These reactions result in inefficient scaling and I/O performance degradation. To address the above problem, we propose a Lazy W ear-L eveling (Lazy-WL) mechanism to reduce the conventional wear-leveling overhead during the scaling process. Its core idea is to reduce the unnecessary intensive wear-leveling migration significantly, via narrowing the difference of program/erase (P/E) cycles among new-added and former deployed disks smoothly and gradually. To demonstrate the effectiveness of this approach, we conduct several simulation via Disksim and real implementation via a Hadoop cluster. The evaluation results show that, compared to the typical inter and intra disk wear leveling methods, Lazy-WL could lower the triggered wear-leveling operations by up to 92.9% and achieve a maximal 85.2% response time reduction, which suggests that Lazy-WL performs a balanced I/O distribution, and maintains high performance of SSD array with high scaling efficiency." @default.
• W3207704595 created "2021-10-25" @default.
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• W3207704595 date "2021-09-01" @default.
• W3207704595 modified "2023-10-14" @default.
• W3207704595 title "Lazy-WL: A Wear-aware Load Balanced Data Redistribution Method for Efficient SSD Array Scaling" @default.
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• W3207704595 doi "https://doi.org/10.1109/cluster48925.2021.00030" @default.
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