traditional data protection solutions to the concerns of regular data backup, and continuous data protection (ContinuousDataProtection, CDP) will shift the focus from backup to restore. Continuous data protection in the area of data protection is a major breakthrough. In the past, a variety of data protection solutions will focus on data backup on a regular basis. However, in the state on a regular basis to back up but will have as a backup time window, open the file and database protection, as well as back-up operation of the business system. Today, CDP has been changed so that a comprehensive data protection, and will be the focus of attention shifted to restore from a backup. CDP can provide important data for changes in the provision of protection, IT administrators do not need to consider back-up. When disasters strike, the CDP-based solutions can be quickly restored to any point of need in order to provide users with greater flexibility and higher performance. Compared with traditional data protection solutions, CDP can provide more flexible recovery point objectives (RecoveryPointObjectives-RPO) and faster recovery time objectives (RecoveryTimeObjectives-RTO), and traditional methods can only create, manage and restore individual time Data back-up point. In contrast, CDP can capture data and protection of all the changes, rather than merely a pre-selected point in time. This may visit at any time, to reduce data loss and eliminate costly downtime losses. Data retrieval is also very reliable, fast and precise. What is a CDP product? Continuous data protection is a continuous data capture and save the changes, and changes in the data independent of the initial data preservation methods, and the method can be achieved in the past any point of time the data recovery. CDP systems may be based on the block, documents or applications, and for an unlimited number of variable points to resume the provision of the fine recovery target. As a result, all of the CDP solution should have the following basic features: data by the continuous changes in the capture and tracking; all data changes are stored in a main storage sites in separate locations; goal is the resumption of any And do not in practice prior to the resumption of the prior definition. At present, there are many accepted ways technology can provide CDP capabilities, including the block-based, documents and the application of a number of ways. Today, many manufacturers have specific applications and environmental data to provide different levels of support and these environmental awareness and understanding. However, both of which use the underlying technology methods, CDP can provide faster data retrieval, stronger data protection and higher business continuity capabilities, and its overall cost and complexity of the solution than ever before Lower. What are the characteristics of CDP products? All CDP solutions can provide continuous data protection and the change will be stored in a separate storage location, and it provides the goal of the restoration is arbitrary. In addition to these general, all types of CDP solutions, there are many differences. We can be summarized as follows these differences. CDP designed methods of operation from the point of view, CDP solutions for the design methods can be divided into block-based, file-based, or based on the application. Block-based storage solutions at the physical or logical volume management on. When the block was written into the main memory, a copy of the data into the CDP system to be captured and stored in a separate location. Similarly, file-based CDP solution design is located on top of the file system that can capture data file system and metadata (such as file create, modify or delete). Based on the application of CDP solutions are designed directly at the protected application-specific way. Such applications of deep integration, and as the application of its own built-in functions can also use a special application in the API changes for the visit given its in-house application of state authority. Based on pieces of paper and the CDP solutions can use the same kind of common approach to support a wide range of applications. The only CDP-based application for a CDP application, but the usual form of expression is a more in-depth integrated manner.
host agent for change in the data for a visit, a number of CDP solutions at the request of the host in need of protection is installed on a special agent software. Some CDP solutions are already using the built-in protection to the host or network data transfer protocol (such as NFS, CIFS, FC or iSCSI) to achieve this function.
the resumption of the different levels of fine CDP solution offers a variety of fine degree of resilience. To restore the degree of precision can be divided into several as follows (in the low to high in the order): Unit volume, a single volume or file system, a single file or folder Group, a single document or application objects (such as e-mail or calendar items).
time to restore some of the CDP application integration solutions for certain applications in an integrated approach to resume. In other words, during recovery, CDP solutions can understand (and be able to identify) to the application of the earlier history of optimization, or the resumption of the most important point. This type of application integration can be completely automated, it can be the scalability.
built-in application integration is a fully automated. For example, a database is well aware of the CDP solution could automatically detect and record the events of recent consistency of information, such as checkpoints or perform transactions. CDP solutions can also provide a mechanism through some of the external input of information flow, or to specify the application to restore an important point. Such integration is scalable. For example, can use the activities of the user interface (or command-line tool), and so on the way to specify the current is an important point in time, such as virus scanning to an end, or the end of the quarter, and other financial companies. It should be noted that, based on the application of the CDP solutions can often be important to understand the application of the automatic recovery point. However, the block-and file-based CDP solutions can also automatically or through a scalable way to provide in-depth application integration.
database for the continuous support of the protection of a number of CDP solutions support some of the common database environment (such as Oracle or MicrosoftSQL) for the protection. Here, the support means that the solution after a comprehensive vendor testing and certification, but also to provide users with the content of the document has been prepared.
protection systems in many volumes CDP solutions can be activated to support the volume or file system full recovery.
network file server to protect a variety of CDP solution for the protection of the network file server platform (such as Windows / CIFS or Unix / NFS) output data.
operating system support for each operating system platform, CDP solutions for manufacturers to go through a comprehensive testing and certification.
many of the library system structure CDP solutions are as a CDP repository (that is, all data is stored in the change of location independent), and this is a repository of LAN, WAN or Internet storage area Clear-specific node. Other CDP solution is to rely on a protected host and independent data directly into the CDP's memory.
library copy some of the CDP solution provides CDP will be copied to another library long-range arsenals. This will provide greater flexibility to prevent the main library CDP may be damaged or lost on the ability to have an impact on the restoration.