Portable and Efficient Continuous Data Protection for Network File Servers

Zhu, Ningning; Chiueh, Tzi‐cker

doi:10.1109/dsn.2007.74

Cited by 22 publications

(11 citation statements)

References 6 publications

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“…Laden et al proposed four alternative architectures for CDP in a storage controller and compared them analytically with respect to both write performance and space usage overhead [60]. Zhu and Chiueh proposed a userlevel CDP architecture that is both efficient and portable [61]. They implemented four variants of this CDP architecture for NFS servers and compared their performance characteristics.…”

Section: Related Workmentioning

confidence: 99%

A Case for Continuous Data Protection at Block Level in Disk Array Storages

Xiao¹,

Ren²,

Yang³

2009

IEEE Trans. Parallel Distrib. Syst.

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Abstract-This paper presents a study of data storages for continuous data protection (CDP). After analyzing the existing data protection technologies, we propose a new disk array architecture that provides Timely Recovery to Any Point in time, referred to as TRAP. TRAP stores not only the data stripe upon a write to the array but also the time-stamped Exclusive ORs (XORs) of successive writes to each data block. By leveraging the XOR operations that are performed upon each block write in today's RAID4/5 controllers, TRAP does not incur noticeable performance overhead. More importantly, TRAP is able to recover data very quickly to any point in time upon data damage by tracing back the sequence and history of XORs resulting from writes. What is interesting is that the TRAP architecture is very space efficient. We have implemented a prototype of the new TRAP architecture using software at the block level and carried out extensive performance measurements using TPC-C benchmarks running on Oracle and Postgres databases, TPC-W running on a MySQL database, and file system benchmarks running on Linux and Windows systems. Our experiments demonstrated that TRAP not only is able to recover data to any point in time very quickly upon a failure but also uses less storage space than traditional daily incremental backup/snapshot. Compared to the state-of-the-art CDP technologies, TRAP saves disk storage space by one to two orders of magnitude with a simple and a fast encoding algorithm. In addition, TRAP can provide two-way data recovery with the availability of only one reference image in contrast to the one-way recovery of snapshot and incremental backup technologies.

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Section: Related Workmentioning

confidence: 99%

A Case for Continuous Data Protection at Block Level in Disk Array Storages

Xiao¹,

Ren²,

Yang³

2009

IEEE Trans. Parallel Distrib. Syst.

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“…Trap-array [2] proposed a disk array based CDP model. Zhu et al [3] proposed a iSCSI interface based CDP. In terms of optimizing CDP system overhead, Clotho [4] used a differential backup method to only back up the changed data portion between versions.…”

Section: Introduction and Related Workmentioning

confidence: 99%

File Version Based Continuous Data Protection On Distributed Object

Yang¹,

Ning²,

Wu³

et al. 2017

Proceedings of the 7th International Conference on Computer Engineering and Networks — PoS(CENet2017)

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Continuous Data Protection (CDP) can restore data to any point-in-time, but high storage overhead and drastic system performance drop restricts its application. In this paper, we propose a file version based file level CDP system (FV-CDP) by using cheap distributed storage for backup to low down the storage costs and using local object cache and parralel asynchronous object sending to mask network storage latency. It designs special opration log to identify the file system hierarchy at any point-in-time and exploits parallel restoring in filesystem recovery. The experimental results show that parallel asynchronous objects sending makes the FV-CDP system max write ops to get improved by about 3.4 times, and the parallel recovery reduces file system recovery time by up to 57%. Under high frequency file syetem change workload, FV-CDP causes a large storage space overhead.

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“…Laden et al proposed four alternative architectures for CDP in a storage controller, and compared them analytically with respect to both write performance and space usage overhead [31]. Zhu and Chiueh proposed a user-level CDP architecture that is both efficient and portable [32]. They implemented four variants of this CDP architecture for NFS servers and compared their performance characteristics.…”

Section: Related Workmentioning

confidence: 99%

“…Recently, continuous data protection has emerged to continually capture all changes, thus storage data can be potentially recovered to any point in time for minimizing data loss in case of errors or outages [30,31,32]. Laden et al proposed four alternative architectures for CDP in a storage controller, and compared them analytically with respect to both write performance and space usage overhead [31].…”

Section: Related Workmentioning

confidence: 99%