HPDA: A hybrid parity-based disk array for enhanced performance and reliability

Mao, Bo; Jiang, Hong; Feng, Dan; Wu, Shaoen; Chen, Jianxi; Zeng, Lingfang; Lan, Tian

doi:10.1109/ipdps.2010.5470361

Cited by 32 publications

(23 citation statements)

References 18 publications

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“…Although they offer on line replacement, these mechanisms considerably increase the amount of I/O to the storage systems and thus the average response time of the system grows, as shown in [11]. Existing SSD based replacement techniques either do not provide online replacement [2] or apply HDD based RAID reconstruction mechanisms [13,14].…”

Section: Motivation and Related Workmentioning

confidence: 99%

Reliability and performance enhancements for SSD RAID

McEwan

Komsul

2017

Microprocessors and Microsystems

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NAND based solid state storage devices are almost ubiquitously used in safety-critical embedded devices, and recent advances have demonstrated RAID architectures specific to solid state storage devices resulting in increased data reliability, with architectural enhancements to solve the age convergence problem. However, these techniques require devices to be taken off-line while components are replaced-consequently these devices are of limited use in hard real time systems. There are further real time issues in that the conventional architectures ignore other characteristics of solid state devices such as garbage collection and meta data management. In this paper we investigate techniques that support the replacement of aged devices in the array in such a way that we provide continuous system reliability. We also improve the performance overhead of the reconstruction process using a novel data migration policy. The techniques are implemented and tested in a trace-driven simulator, and results demonstrate that average I/O response time is improved by up to 39% with improvement by up to 45% in its standard deviation, overheads in terms of device replacement time are negligible, and read performance is improved by an average of 8%.

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Section: Motivation and Related Workmentioning

confidence: 99%

Reliability and performance enhancements for SSD RAID

McEwan

Komsul

2017

Microprocessors and Microsystems

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“…In this way, no one of the blocks cannot be deleted not normally, to avoid SSDS fail [12]. Another way to to fix "wear" problem and the deleting before writing engineers have proposed a hybrid architecture SSD-HDD called HPDA [13], which is more reliable and increases the performance. From [3] SSD uses a flash memory to store the data.…”

Section: Related Workmentioning

confidence: 99%

Secure Deletion of Data from SSD

Fundo¹,

Hysi²,

Tafa³

2014

ijacsa

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Abstract-The deletion of data from storage is an important component on data security. The deletion of entire disc or special files is well-known on hard drives, but this is quite different on SSDs, because they have a different architecture inside, and the main problem is if they serve the same methods like hard drives for data deletion or erasing. The built-in operations are used to do this on SSDs. The purpose of this review is to analyses some methods which are proposed to erase data form SSDs and their results too, to see which of them offers the best choice. In general we will see that the techniques of erasing data from entire disc from hard drives can be used also on SSDs, but there's a problem with bugs. On the other hand, we cannot use the same techniques of erasing a file from hard drives and SSDs. To make this possible, there are required changes in FTL layer, which is responsible for mapping between logic addresses and physical addresses.

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“…iBridge [23] leverages SSD to serve request fragments and bridge the performance gap between serving fragments and serving large sub-requests. HPDA [24] offers a mechanism to plug SSDs into RAID in order to improve the reliability of the disk array. SSD was also proposed to be integrated to the RAM level which makes SSD as the primary holder of virtual memory [25].…”

Section: Applicationmentioning

confidence: 99%

HyCache: A User-Level Caching Middleware for Distributed File Systems

Zhao

Raicu

2013

2013 IEEE International Symposium on Parallel &Amp; Distributed Processing, Workshops and PHD Forum

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Abstract-One of the bottlenecks of distributed file systems deals with mechanical hard drives (HDD). Although solid-state drives (SSD) have been around since the 1990's, HDDs are still dominant due to large capacity and relatively low cost. Hybrid hard drives with a small built-in SSD cache does not meet the need of a large variety of workloads. This paper proposes a middleware that manages the underlying heterogeneous storage devices in order to allow distributed file systems to leverage the SSD performance while leveraging the capacity of HDD. We design and implement a user-level filesystem, HyCache, that can offer SSD-like performance at a cost similar to a HDD. We show how HyCache can be used to improve performance in distributed file systems, such as the Hadoop HDFS. Experiments show that HyCache achieves up to 7X higher throughput and 76X higher IOPS than Linux Ext4 file system, and can accelerate HDFS by 28% at 32-node scales (compared to vanilla HDFS).Index Terms-distributed file systems, user level file systems, hybrid file systems, heterogeneous storage, SSD

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HPDA: A hybrid parity-based disk array for enhanced performance and reliability

Cited by 32 publications

References 18 publications

Reliability and performance enhancements for SSD RAID

Reliability and performance enhancements for SSD RAID

Secure Deletion of Data from SSD

HyCache: A User-Level Caching Middleware for Distributed File Systems

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