TH-CDP: An Efficient Block Level Continuous Data Protection System

Sheng, Yonghong; Wang, Dongsheng; He, JinYang; Ju, Dapeng

doi:10.1109/nas.2009.69

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…Lu and Chiueh proposed a method for tracking and intercepting file operations by loading file filter drivers and recording the intercepted content in a log file in the form of reverse manipulation to achieve continuous file‐level data protection 11 . Sheng et al proposed a centralized file‐level CDP method for differential storage, which uses a combination of mirroring and differential to record file changes on storage, thereby saving storage resources and improving network bandwidth utilization 12 . Jing et al used differential backup to reduce the storage overhead of file‐level CDP and realized file recovery from both directions by bidirectional chaining tables, effectively shortening the recovery time 13 .…”

Section: Related Workmentioning

confidence: 99%

A smart file‐level continuous data protection scheme based on security baseline

Xiao

Xiangxiang

Sun

et al. 2022

Int J of Intelligent Sys

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There is a rapidly growing interest in securing big data due to the rapid development of cloud computing, big data, and other information technologies according to the fourth industrial revolution. Continuous data protection (CDP) is an effective method to deal with huge loss caused by data loss. More optimal design methods are available and studies on the establishment of the knowledge base for an efficient backup data management in the CDP field. In this paper, a knowledge‐based smart file‐level CDP scheme is suggested. The user's foundation database and context information are applied to machine learning technology, enabling a large amount of files' log data and context information accumulated continuously to be stored in the knowledge base using B + tree structure. This enables high performance and flexibility in the data protection management system. The result of comparative evaluation with different security risk levels for verifying the validity shows that the suggested method presented a higher performance in write/query operations and storage overhead.

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Section: Related Workmentioning

confidence: 99%

A smart file‐level continuous data protection scheme based on security baseline

Xiao

Xiangxiang

Sun

et al. 2022

Int J of Intelligent Sys

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“…At present, researches on CDP technology at home and abroad scholars have made some achievements. TH-CDP [1] study on the concrete realization of the block level CDP system; SnapCDP [4] is the realization mechanism for embedding the CDP module into a mechanism implemented in the LVM; ST-CDP [3] is a block level CDP, it works to ensure a fast and reliable data recovery by periodically inserting Snapshot parity check record of the changed data blocks; CB-CDP [5] it is a distributed CDP system scalable file level.…”

Section: Current Research Status Of Cdp Technologymentioning

confidence: 99%

Research and Implementation of CDP Disaster Recovery System based on Oracle

Ren¹,

Ye²,

Zhang

et al. 2015

IJCA

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The OraCDP disaster recovery system uses CDP disaster recovery technology based on the combination of block level, combining with the communication coupling between the underlying I/O and Oracle database. The experimental results show that the OraCDP system can not only maintain the normal operation of the original system without any negative influence, but also guarantee the recovery of data and service at specific time quickly, fully and accurately.

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“…SWEEPER [9] dynamically determines the selection algorithm based on user specified recovery time and recovery point objectives, which allows trade-offs between recovery time and data correctness. CDP systems take trial-and-error test or manual checkpoints to ensure consistence, and TH-CDP [10] encapsulates the checkpoint information into I/O request packet queue to make checkpoints without suspending applications. Although above researches are good references for us on CDP architecture, data compression, blocklevel modification gathering, data consistency ensuring and recovery speed accelerating, they all focus on local based CDP, no cloud based CDP has been studied yet.…”

Section: Related Workmentioning

confidence: 99%

“…And a variant of TH-CDP [10], named TH-CCDP, is also implemented for comparison. TH-CCDP is a typical delta-encoding based block-level CDP system, which holds all blocks' latest version and all deltas of each block write in the history.…”

Section: Evaluation and Analysismentioning

confidence: 99%

Fast Recovery and Low Cost Coexist: When Continuous Data Protection Meets the Cloud

Liu

Wang

2014

IEICE Trans. Inf. & Syst.

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SUMMARYCloud computing has rising as a new popular service paradigm with typical advantages as ease of use, unlimited resources and pay-as-you-go pricing model. Cloud resources are more flexible and costeffective than private or colocation resources thus more suitable for storing the outdated backup data that are infrequently accessed by continuous data protection (CDP) systems. However, the cloud achieves low cost at the same time may slow down the recovery procedure due to its low bandwidth and high latency. In this paper, a novel block-level CDP system architecture: MYCDP is proposed to utilize cloud resources as the back-end storage. Unlike traditional delta-encoding based CDP approaches which should traverse all the dependent versions and decode the recovery point, MYCDP adopts data deduplication mechanism to eliminate data redundancy between all versions of all blocks, and constructs a version index for all versions of the protected storage, thus it can use a query-and-fetch process to recover version data. And with a specific version index data structure and a disk/memory hybrid cache module, MYCDP reduces the storage space consumption and data transfer between local and cloud. It also supports deletion of arbitrary versions without risk of invalidating some other versions. Experimental results demonstrate that MYCDP can achieve much lower cost than traditional local based CDP approaches, while remaining almost the same recovery speed with the local based deduplication approach for most recovery cases. Furthermore, MYCDP can obtain both faster recovery and lower cost than cloud based delta-encoding CDP approaches for any recovery points. And MYCDP gets more profits while protecting multiple systems together.

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TH-CDP: An Efficient Block Level Continuous Data Protection System

Cited by 11 publications

References 3 publications

A smart file‐level continuous data protection scheme based on security baseline

A smart file‐level continuous data protection scheme based on security baseline

Research and Implementation of CDP Disaster Recovery System based on Oracle

Fast Recovery and Low Cost Coexist: When Continuous Data Protection Meets the Cloud

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