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Bitmap-based Disaster Recovery and Backup System Development and Application

Author: FuFei
Tutor: WangChengLiang
School: Chongqing University
Course: Computer Software and Theory
Keywords: Bitmap Snapshot Disaster Recovery Restore Ddp
CLC: TP309.3
Type: Master's thesis
Year: 2010
Downloads: 48
Quote: 0
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Abstract


In the modern enterprise, due to disk damage caused by data loss or access interruption can give enterprises irreparable loss, data disaster recovery is becoming increasingly important in the information age. Disaster recovery system to a certain extent better ensure the safety of disk data, but most of the traditional disaster recovery backup system backup window and restore window and backup and recovery for a long time and other issues, to provide enterprises with 7 × 24 hour sustained and effective data protection to the deficiencies. Full use of existing disaster recovery technology, the bitmap technology into the field of storage, to design efficient backup and recovery technology, and call the system Volume Shadow Copy Service Framework (Volume Shadow Copy Service, VSS framework) designed a sets of a viable data consistency assurance measures. Based on these two technologies and data consistency assurance measures, hierarchical model developed DDP (Disk Data Protection), host-side disaster recovery software, the software system to automatically or manually disk data security. The main work of this paper include: (1) for the traditional disaster recovery backup system backup window operation, long backup time, backup process mostly need to interrupt business, the bitmap technology into the backup algorithm, using a bitmap record changes in the disk data, incremental backup, reducing the backup time; combination of copy-on-write policy processing written data backup, the backup process is not interrupted in the upper business purpose. ② bitmap and snapshot technology is introduced into the recovery algorithm to eliminate the recovery window, modify the disk MBR; recording disk changes using the source bitmap data to complete the bitmap corresponds to the disk data recovery, so as to achieve the recovery process is not interrupted The purpose of the upper layer service. (3) due to the existence of the file system cache, the data on the disk may be incomplete, the resulting disk backup data may be invalid. Invoked through the command line VSS framework, dump the data in the file system cache on the disk, back up data and to ensure the consistency of the data. Of traditional disaster recovery system can not be centrally managed multi-server problem, according to this paper, the design of backup and recovery technology, the use of the hierarchical model developed Ddp disaster recovery software, software three-tier structure of the interface layer, service layer and driver layer . Management interface and services, drivers separately deployment can achieve the purpose of centralized management. After a number of laboratory tests and actual use of several companies to prove the system to make up for the lack of traditional disaster recovery system. The subject for 7 × 24-hour application system has important theoretical significance and value of the works.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Data backup and recovery
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