The hottest data protection is carried out continu

2022-07-25
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Data protection continuous

traditional data protection solutions focus on regular data backup, while continuous data protection (CDP) turns its attention from backup to recovery

continuous data protection is a major breakthrough in the field of data protection. In the past, according to gb/t 50269 (9) 7, various data protection solutions focused on regular data backup. However, in the state of regular backup, problems such as backup time window, protection of open files and databases, and the impact of backup operation process on business systems will occur. Today, CDP has made a comprehensive change in data protection and shifted the focus of attention from backup to recovery. CDP can provide continuous protection for changes in important data. IT administrators do not need to consider the issue of backup at all. When a disaster occurs, CDP based solutions can quickly recover to any required restore point, thus providing users with greater flexibility and higher performance

compared with traditional data protection solutions, CDP can provide more flexible recovery point objectives (RPO) and faster recovery time objectives (RTO), while traditional methods can only create, manage and recover data backups at a single time point. In contrast, CDP can capture and protect all changes in data, rather than just a pre selected point in time. This allows data to be accessed at any time, reducing data loss and eliminating costly downtime losses. Data retrieval has also become very reliable, fast and precise

what are CDP products

continuous data protection is a method to continuously capture and save data changes, and save the changed data independently of the original data, and this method can realize data recovery at any time point in the past. CDP systems may be block, file, or application based, and provide fine-grained recoverable objects for an unlimited number of variable recovery points

therefore, all CDP solutions should have the following basic features: data changes are continuously captured and tracked; All data changes are stored in a separate location from the primary storage location; The target recovery point is arbitrary and does not need to be defined before the actual recovery

at present, there are many recognized technical methods that can provide CDP capabilities, including multiple methods based on blocks, files and applications. Today, many vendors provide varying degrees of support and understanding of specific applications and data environments. However, no matter which underlying technology method is used, CDP can provide faster data retrieval, stronger data protection and higher business continuity capabilities. Its green, low-carbon and environmental protection has become the development trend of the industry, but the overall cost and complexity are lower than any previous solution

what are the characteristics of CDP products

all CDP solutions can provide continuous data protection and store changes in an independent storage location, and the target recovery points it provides are arbitrary. In addition to these commonalities, various CDP solutions have many differences. We can summarize these differences as follows

cdp design method

from the perspective of operation mode, the design method of CDP solution can be divided into block based, file based or application based. Block based solutions are located above the physical storage or logical volume management layer. When a data block is written into the main memory, a copy of the written data is captured by the CDP system and stored in an independent location. Similarly, the file based CDP solution is designed just above the file system, which can capture file system data and metadata events (such as file creation, modification or deletion). Application based CDP solution design is directly located in the protected specific application. This kind of application provides deep integration, and as a built-in function of the application itself, it can also use a special application API to give it permission to continuously access the internal state of the application in case of changes

block and file based CDP solutions can support a variety of different applications using the same common approach. Application based CDP only provides CDP capabilities for certain applications, but the usual form is a more in-depth integration

host agent

in order to access data when it changes, some CDP solutions require that a special "agent" software be installed on the host that needs to be protected. Other CDP solutions implement this functionality using data transfer protocols (such as NFS, CIFS, FC, or iSCSI) that are already built into the protected host or network

recovery fineness

different CDP solutions provide a variety of recovery capabilities with different fineness. The recovery granularity can be divided into the following types (in order from low to high): volume group, single 2, volume or file system during mechanical performance check, single folder or file group, single file or application object (such as e-mail or calendar item)

recovery time application integration

some CDP solutions provide an integrated recovery method for some applications. That is, during recovery, the CDP solution can understand (and identify) the most optimized or important recovery points in the previous history of the application. Such application integration can be completely automatic or extensible

built in application integration is a fully automatic method. For example, a CDP solution with a good knowledge of the database may automatically detect and record information about recent consecutive events, such as checkpoints or executed transactions

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cdp solution can also provide a mechanism to specify important application recovery points through some external input information or processes. This kind of integration is extensible. For example, user interface activities (or command line tools) can be used to specify an important time point, such as the end of virus scanning or the end of the company's financial quarter

it should be noted that application-based CDP solutions can usually automatically understand the recovery points of important applications. However, file and block based CDP solutions can also provide deep application integration in an automatic or extensible way

continuous protection support for databases

many CDP solutions support continuous protection for some common database environments, such as Oracle or Microsoft SQL. Here, support means that the solution has been fully tested and certified by the manufacturer, and the prepared document content will be provided to users

protect system volumes

many CDP solutions can support comprehensive recovery of boot volumes or file systems

network file server protection

a variety of CDP solutions can continuously protect the data output by the network file server platform (such as windows/cifs or the U impact test low temperature tank technical agreement nix/nfs)

supported operating systems

for each operating system platform, CDP solutions must be fully tested and certified by the manufacturer

library architecture

the architecture of many CDP solutions is to use it as a CDP repository (that is, store changes in all data in an independent location), and this repository is a specific dedicated node on a local area, wide area or storage area. Other CDP solutions rely on protected hosts and write data directly to independent CDP storage

copy library

some CDP solutions also provide the ability to copy a CDP library to another remote library. This provides greater flexibility to prevent possible damage or loss of the primary CDP library from affecting the recovery capability

function list of continuous data protection products:

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