容灾软件
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数据同步：联鼎数据容灾采用了驱动层抓取 I/O 技术，并应用了 CDP 技术，实现了数据回滚，对 oracle 数据库可实现更高效的逻辑复制。为了适应容灾的远程特性，联鼎采用更加先进的方式来实现本地与异地的数据同步传输，支持它由块级底层触发，一旦有对数据的操作，则将相应的操作以变更数据日志的方式保存下来，同时，传输模型发起数据“推动”，将变更数据日志发送到备机上,进行数据恢复工作，使得两台服务器的数据保持一致，这个过程同步的时效性非常高，更适应恶劣网络环境下的远程容灾应用。 高可用集群切换：LanderDisaster 中的应用切换使用联鼎 LanderCluster 高可用集群模块实现，通过对核心应用服务器的不断侦测，自动与数据同步复制模块联动，可实现本地/异地的应用无缝切换，保证结构化数据与非结构化数据在切换前后的一致性，通过独特的故障分级处理系统，避免大量的无效切换与误切换，适合建立快速与可靠的企业级容灾系统。
Data Synchronization: Lander Data Disaster Recovery adopts driver-layer I/O capture technology and applies Continuous Data Protection (CDP) to enable data rollback, delivering more efficient logical replication for Oracle databases. To accommodate the remote nature of disaster recovery, Lander has adopted a more advanced approach for local and remote data synchronization and transmission. This solution supports triggering at the block-level underlying layer: once any data operation is performed, the corresponding actions are saved as change data logs. Meanwhile, the transmission model initiates a data "push" to send these change data logs to the standby server for data recovery, ensuring data consistency between the two servers. This synchronization process boasts extremely high timeliness, making it particularly suitable for remote disaster recovery applications in harsh network environments. High-Availability Cluster Switchover: The application switchover in LanderDisaster is implemented via the LanderCluster high-availability cluster module developed by Lander. Through continuous monitoring of core application servers, it automatically links with the data synchronization and replication module, enabling seamless application switchover between local and remote sites. It guarantees the consistency of both structured and unstructured data before and after switchover. Equipped with a unique fault grading and processing system, it eliminates a large number of invalid and erroneous switchovers, making it ideal for building fast and reliable enterprise-level disaster recovery systems.
