As a new type of storage model, cloud storage is developing rapidly. Data management and storage is a very important and valuable field in cloud computing. It is difficult to manage and distribute data in current medical systems, such as resources of major hospitals. Sharing and information exchange, as well as the disclosure of scientific research results, the management and invocation of patient files, the difficulty of registering patients and the difficulty of medical treatment, combined with Internet-based distributed cloud storage to manage the entire medical system as a whole, and the use of cloud storage can also Encrypting and protecting part of the hidden data maximizes the convenience of the medical system management model and the patient's various interests, and is also very helpful for saving the cost of doctors and patients.
1 Distributed cloud storage
1.1 Cloud Storage
DIC research shows that from 2006 to 2010, the global information volume has grown rapidly, from 161 EB to 988 EB. In the face of the rapidly growing demand for information storage, traditional SAN or NAS has a large gap in performance and capacity expansion. Based on the rapid development of this information, in recent years, with cluster technology and embedded virtualization With the development of technology, cloud storage came into being. Similar to cloud computing, it refers to a system that provides services access and data storage by working together with small storage blocks of various devices in the network through functions such as distributed file system, grid technology, or cluster application. .
1.2 GFS-based cloud storage
Cloud storage is a new concept based on cloud computing. How to integrate the storage structure into a whole requires the connection of the network, so this paper proposes an Internet-based design concept and applies it better. In the collection of cloud storage information blocks, GFS, Gogoel Fiel Sysetm, is a scalable large distributed file system used to access large amounts of data. Unlike traditional file systems, CFS is designed for large-scale data processing and Gogoel application features. The development of cloud storage application technology will focus on improving 1/0 rate, data encryption and data storage in the future. The differences between GFS and ordinary distributed file systems are shown in Table 1:
Table 1 Differences between GFS and ordinary distributed file systems
The GFS system consists of a lot of block servers and Masectr. All metadata stored by the Master in the file system includes the namespace, file partition information, location information of the file block, and access control. CFS provides an interface similar to a traditional file system. Files are in the directory, identified by path names, and organized hierarchically. CFS files are divided into small blocks for storage. Redundant storage is used in the CFS file to ensure the reliability of the data. In order to ensure the uniformity of the data, more than three backups of the same data are saved with one version number, and all backups are modified every time the data is modified. The version number checks to see if the backup is in the same state. This article uses CFS as an example to discuss cloud storage technology. The system architecture is shown in Figure 1.
Figure 1 GFS system architecture
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