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contact What is DataGuard CDP?
Our DataGuard CDP Solution is a server software application that enables disk-based data protection and recovery for servers and workstations running Microsoft Windows and Linux operating systems. DataGuard Server protects disk volume data using replication and synchronization over the network storing point-in-time snap shots in disk-based storage.
DataGuard Server works by reading your hard disk volumes at the sector level, bypassing the file system for the ultimate in performance and recovery. This disk sector synchronization is performed while the server is online and provides no interruption to other I/O requests even on a busy server. By reading the disk at the lowest possible level point-in-time recovery images contain your files and all the formatting, partition tables, and volume configuration needed for complete and instant disaster recovery.
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The Data Protection Process
Scheduled point-in-time volume snapshots are scheduled on the DataGuard Server. The DataGuard server then periodically connects to the DataGuard Agent program and synchronizes changed disk sectors to the DataGuard Server. The DataGuard Server creates a new point-in-time image of the disk volume every time it connects to the agent for synchronization. The point-in-time images are called recovery points and are stored in what Righteous calls a Disk Safe.Recovery points only consist of a copy of changed disk sectors. This means it usually only take seconds or minutes to complete disk synchronization even on very large volumes. The more frequently recovery points are schedule the quicker they complete. When compression is enabled hundreds of recovery points can be stored in less space than it takes to store one disk image. In between synchronization requests from the CDP Server, the DataGuard Agent passively tracks changes to the hard disks as they are happening. This process introduces NO overhead and requires a relatively small amount of memory. This is typically about 6MB of memory per 100GB of disk storage being synchronized.
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