Parse data protection policies in different storage environments

Data storage backup and storage management originated from the terminal/host computing mode in the 1970s S. At that time, because the data was concentrated on the host, the easy-to-manage massive storage device-tape library was a necessary device at that time. After 1980s, due to the development of pc, especially the popularity of the most widely used user machine/server model in 1990s and the rapid development of the Internet, this has led to fundamental changes in storage capacity, storage models, and storage requirements. Some emerging storage technologies have rapidly emerged, providing more choices for building a safer information age.

How to ensure reliable backup of all data and timely disaster recovery is the core task of storage management software. In addition, the storage management software also has the following basic functions, such as improving system and application I/O performance and storage management capabilities to improve the high availability of data and application systems, reduce the time required for data access interruption or application system downtime due to various reasons, and implement technologies such as Hierarchical Storage Management (HSM) and ClusterServer (Cluster Server.

Manage data through software

Data Management provides VolumeManager tools that can identify and analyze storage access modes. VolumeManager balances I/O load through complex disk configurations, and optimizes the layout of application data without affecting applications. It can also Scatter Data bars to multiple physical disks to improve performance. It also has the ability to identify and eliminate performance bottlenecks without interrupting applications, this enhances the performance of systems and applications. In addition, VolumeManager also performs well in reducing system interruption time and increasing data integrity. It allows online disk management and Configuration modification to reduce the downtime that has a significant impact on the system. It also uses redundancy technology to improve data availability and prevent data loss and destruction.

Next, there is also a very important log-type file system that can be quickly restored. It can back up files online without interrupting data access, and allows access to data and file recovery before the system restarts or crashes, which greatly improves the production efficiency of users and administrators. Before the system crashes, FileSystem can record unfinished data in an event log and reproduce the data using the restoration program, thus maintaining data integrity.

Both VolumeManager and FileSystem work at the operating system level to achieve cluster and fault recovery, automatic management, backup and HSM, and browser-based Remote Management. After the combination of the two, the unique disk and data management capabilities of both parties can provide the enterprise's systems with the highest performance, availability and manageability possible.

Data storage and backup technology generally includes hardware and software technologies. The hardware technology is mainly tape drive technology, and the software technology is mainly general and dedicated backup software technology. We mainly discuss the software technology. Backup Software technology is quite important in the entire data storage and backup process, because it is not only related to whether tape supports various advanced functions, but also determines the backup efficiency to a large extent. The best backup software is not necessarily the backup function provided by the operating system. Many manufacturers provide many professional backup software. Professional backup software can automatically transmit data at a higher transmission rate by optimizing the data transmission rate. This not only shortens the backup time and increases the speed of data storage and backup, but also benefits the tape drive device itself. In addition, professional backup software also supports new tape drive technologies, such as hp's TapeAlert technology, and almost all mainstream professional backup software.

Data protection policies for different storage environments

The network is becoming the main information processing model, and the amount of data to be stored is greatly increased. As a strategic asset to gain a competitive advantage, the importance of data is increasing. NAS connects storage devices to a group of computers through standard network topologies (such as Ethernet. The focus is to help working groups and departments to quickly increase storage capacity. This method improves data availability in two aspects. First, even if the corresponding application server no longer works, the data can still be read. Second, the simple server itself will not crash, because it avoids the primary cause of server crash, that is, problems caused by application software. In addition, NAS is a real plug-and-play product, and its physical location is very flexible.

A san (storage Local Network) is connected to a group of computers over a fiber channel. Multi-host connection is provided in the network, but not through the standard network topology, and supports a wide range of ScsI and IP protocols through the same physical channel. Its structure allows any server to connect to any storage array, so that the server can directly access the required data no matter where the data is stored. The SAN solution removes the storage from the basic functions, so you do not need to consider the impact of the backup operations on the overall network performance. This solution also simplifies management and centralized control, especially when all storage devices are clustered together.

Clusters are usually used to enhance the availability and scalability of application software. Some Cluster Structure technologies will be added to the concept of a single system impression. You can manage multiple computers in a single system mode from a single point of view. The Cluster Server supports up to hundreds of interconnected servers, and executes jobs in combination with loose units to protect their applications from faults. The cluster server can fully integrate the application software service structure, so an efficient application software execution environment can be built. Even if the entire system fails, the terminal computer can use almost all the application software. Cluster Server software includes engines, compilers, load calculators, proxies, commands, and Graphical System Management interfaces. The biggest advantage of a cluster computing environment is its excellent data processing capabilities. In principle, any type of multi-host structured storage devices, including directly connected disks, can be used as cluster data storage devices. To maximize system availability, the fault tolerance or high availability storage subsystem with multiple host access paths is the most suitable. Hierarchical Management can solve the problem of how to effectively expand the capacity caused by the increasing storage capacity. In many cases, it is more used in distributed network environments. Classification means that different media are used for storage, such as RAID systems, optical storage devices, and tapes. Each storage device has different physical characteristics and different prices. For example, when you want to back up data, the backup files are generally stored on storage devices with relatively slow speeds, relatively large capacities, and relatively low prices, such as tapes. This is very economical and practical. How can we achieve classification? In principle, Hierarchical Storage is a way to migrate data from an online system. Files are migrated by the HSM system and then copied to the HSM media. After the file is correctly copied, a logo file with the same name as the original file is created, but it only occupies a much smaller disk space than the original file. Later, when the user accesses this flag file, the HSM system can restore the original file from the correct media. Hierarchical Storage can be implemented in different ways. HSM classifies dynamic migration/migration data based on two or three-level systems to achieve Hierarchical Storage. The depth of storage applications will inevitably bring about the need for the overall solution, which not only includes hardware, but also the corresponding software and services. A software-hardware-compatible integrated application environment is the trend of the times. For example, the proposal of Storage Virtualization proves this trend. It helps improve storage utilization, simplify management, and reduce costs, and build an integrated storage application environment. In short, with the development of network technology and the continuous improvement of computer capabilities, the data volume is also expanding. Data backup and recovery and other storage technology issues become more and more important. The development of storage management technology will surely attract the industry's high attention.