![Page 1: Disaster Recovery in the Cloud -- A Failover Testing Case Study](https://reader037.vdocuments.net/reader037/viewer/2022100601/557da00ad8b42a3a7c8b4f30/html5/thumbnails/1.jpg)
Colocation Dedicated Servers Private Clouds
Copyright © 2011 Online Tech. All rights reserved www.onlinetech.com 734.213.2020
Disaster Recovery &Private CloudOur Real-World Example
Yan NessCEO, Online Tech
![Page 2: Disaster Recovery in the Cloud -- A Failover Testing Case Study](https://reader037.vdocuments.net/reader037/viewer/2022100601/557da00ad8b42a3a7c8b4f30/html5/thumbnails/2.jpg)
Colocation Dedicated Servers Private Clouds
Copyright © 2011 Online Tech. All rights reserved www.onlinetech.com 734.213.2020
Our Private Cloud
• 23 Physical Servers• 18 Windows, 5 CentOS
servers• 4 database servers• Each ~10% utilized
• OT Private Cloud– 2 Hardware Servers (N+1)
• 2xQuad Core CPUs, 48GB RAM
– 8TB SAN (SATA – RAID 10, 3TB usable)– HA Configuration
• Automatic Load Balancing Across Hosts• Automatic Failover to Single Server
– Continuous Offsite Backup– Warm Site D/R in Ann Arbor
• 4 Hour Recovery Time – Fully Tested
2
![Page 3: Disaster Recovery in the Cloud -- A Failover Testing Case Study](https://reader037.vdocuments.net/reader037/viewer/2022100601/557da00ad8b42a3a7c8b4f30/html5/thumbnails/3.jpg)
Colocation Dedicated Servers Private Clouds
Copyright © 2011 Online Tech. All rights reserved www.onlinetech.com 734.213.2020
Our WorldEverything is Mission Critical
3
SAN
VS VS VS
VS VS
Restore
![Page 4: Disaster Recovery in the Cloud -- A Failover Testing Case Study](https://reader037.vdocuments.net/reader037/viewer/2022100601/557da00ad8b42a3a7c8b4f30/html5/thumbnails/4.jpg)
Colocation Dedicated Servers Private Clouds
Copyright © 2011 Online Tech. All rights reserved www.onlinetech.com 734.213.2020
Lessons
• 22 Servers restore and restart very quickly• 45 minutes
• Exchange • 3.5 hours
• Total Storage• 1.5 TB of server run files and data
• Network• Maintain dual-network at production and DR site• DNS for failover
• Backup• Assure success daily or even hourly• Database backups can require special care
Fast, Effective but Manage or Die