• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.4 no.2
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• pp.126-134
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• 2011

In this dissertation, in the light of the above situations, we intend to use new approach for stable and fast backup system. The approach that we propose network and software infrastructure has three different ways by comparison with existing network backup systems. First of all, we use a socket communication so that resolve the shortcoming of weakness of securities; second, TBD utility for minimizing target system loads in the way of instant operating; and third, time division and bandwidth division backup method considered transfer data size(byte) might be useful more stable and fast comparing with FTP Transfer.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.44 no.6
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• pp.10-18
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• 2007

In consideration of increment and importance for data, an efficient and large storage backup system requires. Existing backup system solutions show some limitations in speed and technical. In order to solve these deficiencies, backup and recovery system of high efficiency and large storage capacity was designed and implemented by using high speed, compression technique and backup accelerator etc. Backup and recovery system applies to multi-threading, multi-processing and multi-streaming technology. And already established systems based on tape, but proposed backup operating model designed on disk. Therefore, the implemented of system leads to these backup media problems as well as solutions to aforementioned issues with existing backup system.

• International journal of advanced smart convergence
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• v.7 no.3
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• pp.61-65
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• 2018

A Location Register(LR) system manages each subscriber's location information, which continuously changes in mobile cellular network. For this purpose, the LR database system provides backup management facilities. The objectives of this paper are to identify the problems of the current LR system through rigorous analysis, to suggest solutions to them. I proposed efficient backup methods that takes into account the characteristics of LR database transactions. In the proposed backup method, I use two kinds of dirty flags in order to solve the performance degradation problem caused by frequent registration- location operations.

• Journal of Power System Engineering
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• v.16 no.3
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• pp.22-28
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• 2012

Active magnetic bearings(AMBs) present a technology which has many advantages compared to traditional bearing concepts. However, they require backup bearings in order to prevent damages in the event of a system failure. In this study, the dynamics of an AMB supported rotor during impact on backup bearings is studied employing a detailed simulation model. The backup bearings are modeled using an accurate ball bearing model, and the model for a flexible rotor system is described using the finite element approach with the component mode synthesis. Not only the influence of the support stiffness, clearance and friction coefficient on the rotor orbit, but also bearing load are compared for various rotor system parameters. Comparing these results it is shown that the optimum backup bearing system can be applicable for a specific rotor system.

• Journal of the Semiconductor & Display Technology
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• v.13 no.4
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• pp.37-42
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• 2014

Stable running is a very important factor when we are building a control system. But, sometimes malfunction of the system controller is caused by several reasons. To solve these problems, some systems have prepared a backup controller. In the generality of cases, making a backup controller is no easy work. Especially, it becomes more difficult when many backup controllers have to be embodied in one system. In this paper, the multi-backup function controller which was implemented in the form of the network type distributed control system will be suggested. Also, using Arago Disk System that has a structure for inner loop control, the validity of the proposed methods will be verified.

• The Journal of the Korea Contents Association
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• v.6 no.2
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• pp.105-116
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• 2006

With the development of IT technology, the amount of digital contents used in various environments of wired/wireless networks have been increased hugely and rapidly To protect the loss of the digital contents from the sudden accident, continuous data backup is required. In this paper, we design and implement the backup system that stores digital contents in backup storage by objectifying the contents with a unit of I/O size and giving them the unique E using the properties of digital contents to avoid duplicated store of the same data. The backup system reduces the amount of backup data efficiently by backing up the only one copy of the duplicated data. as a result, the backup system can back up the digital contents more efficiently in a constrained storage space.

• The Journal of Korean Association of Computer Education
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• v.17 no.2
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• pp.97-106
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• 2014

There is a lot of interest in the data storage and backup systems according to increasing the data intensive services and related user's data. The overhead of backup performance in massive storage system is a critical issue because the traditional incremental backup strategies causes the time consuming bottleneck in the SAN environment. The SANique Smart Vault system is a high performance backup solution with data de-duplication technology and it guarantees these requirements. In this paper, we describe the architecture of SANique Smart Vault system and illustrate efficient delta incremental backup method based on journaling files. We also present the record-level data de-duplication method in our proposed backup system. The proposed forever incremental backup and data de-duplication algorithms are analyzed and investigated by performance evaluation of other commercial backup solutions.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.1133-1136
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• 2005

The proposed high-speed backup and recovery system is a high performance backup software based on multi streaming I/O and high speed/high compression technology, and can realize an increase efficiency of backup volume without any increase of backup H/W equipments since it provides a high performance in data backup of a user and executes high compression very fast. Particularly, it minimizes consumption of network band width through a development of algorism for high compression in connection with backup equipments in a large-scaled system environment, is automated when it is recovered due to danger and troubles, and allows users to conveniently access in various ways since GUI and CLI for execution and management are all provided.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.405-406
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• 2008

To maintain reliable and stable power grid the Power Dispatch Center consists of two sections, primary and backup centers. It is necessary that the Backup Dispatch Center stay away from the primary center in case of emergency like terror and natural disaster. The Backup Dispatch Center operates transmission lines outside of Seoul metropolitan area and could perform main center's role when primary center lose control Without building a duplex Power IT system, it would be doubtful to operate both centers efficiently. This paper deals with primary and backup Power IT systems which run two Dispatch Centers and focuses on expectation effects of its duplex system and transferring the Backup system.

• Journal of Korea Society of Digital Industry and Information Management
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• v.4 no.2
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• pp.101-108
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• 2008

In this paper, we develop system to backup automatically personal data by real time based on ECA model. This system backups data that is changed in user PC using CDP technology based on ECA model. Proposed ECA model defines file's change such as file creation, update, remove etc. in user PC to event for synchronization between server and user PC. If event is detected about file, proposed system examines condition that is defined and backup the file to server. Backup data that is stored to server can recovery on point of time that user wants. The proposed system can be applied to data management system for business, personal data management system, high-capacity contents management system etc.