Netgear RN00RPL1 Replicate for Desktop Software Guide

Page of 36
  Chapter 1.  ReadyNAS Replicate Overview
 
   
|
     
7
ReadyNAS Replicate Software Manual 
Simplified, Efficient Data Management
Managing efficient backup and restore tasks can be complex, even with the most 
sophisticated tools. Coordination between the data source and backup target is required to 
efficiently and consistently backup data or systems. 
ReadyNAS Replicate automates and simplifies these complexities, creating point-in-time 
backups, even if a backup job takes hours. It is as if the data on your ReadyNAS is taken 
from a snapshot in time while the backup job executes. The data stored in each backup job is 
cataloged and can be easily searched; even a single file within a job can be restored by date. 
Because backups are incremental, only data that has changed is backed up, however each 
and every backup revision behaves as a full backup. By selecting a backup job and a restore 
location, single points of data or an entire system are automatically restored without manual 
copying or downloading.
Data is backed up from one ReadyNAS (called the source) to another ReadyNAS (called the 
target). The target ReadyNAS contains most of the intelligence and manages the backup and 
restore process. The source checks which blocks in a file have changed and only sends the 
changed blocks, while the target catalogs the data from each backup occurrence in a manner 
that makes it searchable with a fully indexed behaving like a full backup but at the cost of only 
an incremental backup. 
In addition, the target instructs the source to create a snapshot of the data to be backed up 
and then instructs the source to release the snapshot when the backup is completed. Having 
the intelligence in the target also allows data to be easily restored to any ReadyNAS device.
ReadyNAS Replicate can also be used to backup and restore unstructured file data across 
your ReadyNAS devices, no matter where they are located. To back up structured data, such 
as database files or virtual machine disk (LUN) on the ReadyNAS, these backups are "crash 
consistent.” If applications, such as databases or virtual machines, do not quiesce and buffer 
flushed, the data in the backup could appear as if the server was halted before all the data in 
memory could be written to disk. However, most modern applications are designed to recover 
from crash consistent data. Creating crash consistent backups has the advantage of putting 
no load on the source host whether a database or virtual machine environment.