(IDC Peng Shuai)
First, what disaster recovery protection?
For businesses, the user data and system data are is the most crucial and most important asset, but the following various reasons, can give the data to bring irreversible damage. Only a sound disaster recovery plan in order to ultimately ensure data security and business continuity.
With the rapid development of the Internet market, and users of the increasing importance attached to the data, according to Chilean research data center statistics, the market size of the disaster recovery industry has reached the scale of billions, and is expected to continue to grow year after year.
Second, what is disaster recovery?
Disaster recovery is referred to as disaster recovery and backup. + = Disaster recovery plan disaster recovery program backup scheme.
Definition and disaster recovery: means establishing two or more sets of the same functionality in the IT system farther apart two (or off-site city), between mutually health status monitoring and switching functions. When the system is stopped due to an accident (natural disasters, man-made), the entire application can switch to another system, so that the system can continue to operate properly function. It focused on data synchronization and system continuously available.
· Definition of backup: refers to important data (original or important data information) produce one or more copies, to enhance the security of user data generated by the application system. Focusing on backup and store data.
Third, the two key technical indicators disaster recovery
RTO: RecoveryTime Object, recovery time objective. Refers to the disaster, from IT system downtime resulting in service halt of the moment began to recover IT systems to support the operation of various departments, when business resumed operations, the period of time between the two points is called RTO.
RTO is a reflection of business recovery timeliness of the index, reflecting the company's IT system can tolerate the longest recovery time. RTO set target value is set smaller, on behalf of the stronger resilience disaster recovery requirements of the system, but business investment also higher.
RPO: Recovery Point Object, recovery point objective. Refers to the disaster, the disaster recovery system for data recovery to recover data point corresponding to the time is called RPO.
RPO is a reflection of the amount of data loss indicators, reflecting the maximum amount of data loss can be tolerated in Business. RPO target value is set smaller, on behalf of corporate data loss allowed fewer, smaller business losses.
The core design of disaster recovery program are: to help customers balance the RTO / RPO requirements and financial capability customers find the best technology and means of realization, the right is the best.
four. Disaster recovery in three levels:
The first is data-level disaster recovery. There are many ways-level data, such as scheduled backups every night or every so often to do a backup. Another way is more advanced disaster recovery data replication and continuous real-time synchronization.
The second is the application-level disaster recovery. Application level is based on the data level, to ensure the continuity of application-related processes and services, including local and remote disaster recovery application level, ensuring that when the production side fails, the standby-side applications can quickly switch over.
The third is the business-level disaster recovery. If the data-level disaster recovery, application-level disaster recovery are in the context of IT systems, business-level disaster recovery is disaster recovery basis in more than two levels, the need to consider factors other than the business of IT systems, including spare office space, office personnel, and business-level disaster recovery typically have higher demands on IT systems to support the business.
The relationship between these three levels is step by step and on. The most basic is the data level, followed by the application level, it is the highest service level. In general, companies will be building data-level and application-level. When disaster recovery construction, every business because of the different production environments and preferences, so that the delivery method of disaster recovery are not the same. British delivery based on years of experience in disaster recovery in the industry first proposed the "software + hardware + DRaaS" full ecological delivery models to suit different business needs for disaster recovery construction.
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