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Modern distributed storage systems often store redundant data in multiple replications or erasure coding according to their access frequencies. Multiple replications scheme is well-performance for hot data while erasure coding scheme is storage-efficient for warm and cold data. When hot data turn cold, an encoding procedure starts to do the conversion. However, due to sequential striping, current...
The increasing cost and complexity of data management is driving data centers to consolidate resource and provide storage service for multiplex applications. Therefore, storage systems must be able to guarantee multi-dimensional Quality of Service (QoS) for various applications. However, satisfying performance targets for each workload is challenging, because that the I/O characteristics of workloads...
With the rapid growth of data, query performance is an important concern in cloud storage applications. To reduce the query response time, cuckoo hashing via d hash functions has been adopted to achieve O(1) query efficiency. However, in practice the cuckoo hashing consumes a large amount of system resources, since an item insertion may suffer from frequent “kick-out” operations or even endless loops...
Real-time file sharing is important to improve the quality of cloud services. Current cloud systems however fail to efficiently offer cost-effective data analytics due to slow response and energy inefficiency. In order to support real-time processing and improve energy efficiency in the cloud, this paper proposes a novel cost-effective data analytics scheme, called Needle. The idea behind Needle is...
Flash-based solid-state drive has been proved to be a competitive alternative to mechanical disk for its high performance and low power consumption. But SSD still suffers from relatively high price and low density, which calls for consolidating device resource to bring down the cost of deploying expensive dedicated flash-based storage systems for specific applications. Within such environment, applications...
P2P storage systems have a lot of attractive advantages, such as self-organizing, scalability, robust and fault-tolerant. Unfortunately, there are some problems in real network conditions, especially, when considering asynchronous wide-area networks, where messages may be delayed indefinitely and nodes may fail. So, failure detector is one of basic components to build a reliable P2P storage systems...
Storage consolidation as a perspective paradigm inevitably leads to the extensive installations of shared storage servers in product environments. However, owing to the dynamics of both workloads and storage systems, it is pragmatic only if each workload accessing common storage servers can surely possess a specified minimum share of system resources even when competing with other workloads and consequently...
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