Asynchronous Replication. Configuring Scheduled Snapshots

Published: October 2015

This document describes the process of configuring scheduled snapshots for StarWind Asynchronous Replication, explains how to schedule periodical snapshots using Windows Task Manager and StarWindX module, and is intended for StarWind users who want to learn asynchronous replication deployment and the basic snapshot management, being a comprehensive step-by-step instruction, good for beginner users as well as seasoned professionals.

A disaster recovery site is crucial for companies that care about their data and obligatory for companies under regulatory requirements, as On-site Redundancy (RAID, Synchronous Mirroring, etc.) does not guarantee data protection from disasters like hurricanes, floods, and earthquakes, which may completely destroy the primary datacenter.

The combination of StarWind data-compression and replication technologies eliminate the issues of high cost, performance impacting, and data integrity, which are typical for conventional DR implementations. It also prevents the usual pitfalls found in traditional DR solutions by allowing installation to take place in the cloud VM for DR purposes and moving the replication and data compression to the background.

Asynchronous replication presumes that a certain number of data snapshots will be stored on a disaster recovery node. It also creates a need in rotating these snapshots, since administrator can run out of space on the server making it impossible to create new snapshots. StarWind snapshots are incremental.

This procedure must be as automated as possible to avoid any possibility of human error. 3 key statements are pointed out below:
  • administrator should know how many snapshots he wants to have available all the time;
  • administrator should know how often he wants to take snapshots;
  • administrator should know his production workload to calculate growth of data in snapshots.

The process implies having at least one main node and one replication node, further referred to as disaster recovery node. Ability to take snapshots on the storage level is supported by StarWind Virtual SAN for thick image file.

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