Analysis of data protection strategies in different storage environments

Data storage backup and storage management stems from the terminal/host computing model of the late 70, when data was concentrated on hosts, so manageable mass-storage devices----tape libraries were the necessary devices at the time. Since the 80 's, due to the development of PC, especially the popularity of the most widely used user/server model in the 90 and the rapid development of the Internet, the storage capacity, storage mode and storage requirements have changed radically, and some new storage technologies have emerged rapidly, Offers more options for building a more secure information age.

How to ensure that all data can be reliably backed up and that disaster recovery is the core task of storage management software in a timely manner. In addition, storage management software has some basic features such as improved system and application of I/O performance and storage management capabilities, increased availability of data and application systems, reduced time to interrupt data access or application downtime for a variety of reasons, and implemented technology with tiered storage management (HSM), Clusterserver (clustered server) and so on.

Managing Data through management software

The first and foremost of data management is the ability to provide volumemanager tools that identify and analyze storage access patterns. Volumemanager can balance the I/O load through a complex disk configuration and optimize the layout of the application data without impacting applications. It also allows the data bars to be scattered across multiple physical disks to improve performance, while also having the ability to identify and eliminate performance bottlenecks without disrupting applications, thereby enhancing system and application performance. In addition, Volumemanager can reduce system interruption time, increase data integrity and so on. It allows for online management and modification of the configuration of disks, reducing downtime that has a significant impact on the system, while leveraging redundancy to improve data availability and prevent data loss and destruction.

Then there is a very important, fast-recovering log-File system filesystem, which enables online backup of files under uninterrupted data access and allows access to data and restores files before the system restarts or crashes, greatly improving user and administrator productivity. FileSystem can record unfinished data in an event log before the system crashes and reproduce with the recovery program, preserving the integrity of the data.

Both Volumemanager and filesystem work at the operational system level for cluster and failback, automated management, backup and HSM, and browser-based remote management. The combination of the two, using both the special disk and data management capabilities, to the enterprise system to provide the highest possible performance, availability and manageability.

Data storage backup technology generally includes hardware technology and software technology, hardware technology is mainly tape drive technology, software technology is mainly general-purpose and special backup software technology. We discuss it mainly from the aspect of software technology. Backup software technology is important in the entire data store backup process, as it relates not only to the various advanced features that support tape, but to the efficiency of the backup to a large extent. The best backup software is not necessarily the backup function provided by the operating system, and many vendors offer a lot of professional backup software. Professional backup software through the optimization of data transmission rate, that is, can be automatically high transmission rate for data transmission. This not only shortens backup time, improves data storage backup speed, but also benefits the tape drive device itself. In addition, professional backup software supports new tape drive technology, such as HP's Tapealert technology, which is supported by almost all major professional backup software.

Data protection policies for different storage environments

The network is becoming the main information processing mode, the data that needs to store is increased massively, the data as the strategic asset that obtains the competitive advantage is increasing in importance. NAS connects storage devices to a group of computers through a standard network topology, such as Ethernet. The focus is on helping teams and departmental organizations address the need to rapidly increase storage capacity. This approach improves the availability of data in two ways. First, even if the corresponding application server is no longer working, the data can still be read. Second, the simple server itself will not crash because it avoids the primary cause of the server crash, which is the problem with the application software. In addition, NAS products are truly Plug and play products with a very flexible physical location for their devices.