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Download Virtualization for Disaster Recovery & Business Continuity
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DR Challenges of Traditional DR Production DR Application App bound to OS, OS bound to HW • Bound to HW Application • 5-10% utilized OS OS OS files x86 OS files WAN x86 local storage Storage local storage Storage DR is EXPENSIVE and COMPLEX! Waste of servers, storage, power & space at DR site! 1:1 DR Challenges of traditional DR Challenges of Traditional DR: Recovery Process Prod DR “Boot & Pray” cd, tape or ghost image Application OS Application WAN OS OS files OS files x86 local storage x86 local storage Repl process: OS – Images App Data-Replication SW: Storage – – – – SAN-SAN, OS based Just Tier 1! Storage Complex to physically recover OS, applications & data Separate processes for system and application data OS & applications have dependencies on hardware configuration Tier 2 & 3 applications left unprotected, adding to Tier 1 RTO risk Slow and Unreliable Process Drawbacks of traditional DR • Waste of resources: servers, networking, storage, space, power, cooling, connectivity... • High maintenance cost: any Change in Primary -> needs Change in DR (HW/SW) • Hard or impossible DR simulation (conflicts with the primary) • Hard or impossible alternative usage (quality, test, development) • Final Result: When needed will often not work! What is Server Virtualization VMware server virtualization packages hardware, OS, and applications into a portable virtual machine package Before Virtualization • • • Software tied to hardware Single OS image per machine One application workload per OS After Virtualization • • • Multiple workloads per machine Software independent of hardware System, data, apps are files VMware Virtualization Enablers for DR Hardware Independence • Eliminate need for 1:1 hardware duplication for DR • Eliminate risk of hardware “configuration drift” (disparate sites) • Re-use older servers for DR Run a virtual machine on any server without modification The Challenges – as Seen in the Field Customer challenges: • Low budget • Lack of experienced personnel • Solution is complex and slow to deploy Customer profile: • Customer who otherwise would not implement DR solution because of high costs • Customer who is looking for solutions for department or branch office • Virtualization newbie looking for add-on to an existing DR solution • Customer who is under the time pressure The Solution: DR in a Box Main Features: • Affordable • Easy • Pre-packaged • Flexible What is the KEY • • • • • Packaged solutions are usually less expensive than traditional approach via consulting Reusable solutions and deliverables instead of time intensive customizations Redeploy a reinforced solution instead of designing a new solution Use less experienced staff for the implementation Flexibility is one of the main customer demands, so it needs to be addressed: DR-in-a-box is designed as a set of a few solution blocks. Each block is a packaged solution designed to solve a sub-set of the problem. Blocks may be combined to build a complete disaster recovery solution. DR in a Box Solution Blocks – Outline DR for VirtualCenter - What is THE KEY VirtualCenter Server is almost a stateless application. However the replication is required for the following files: • SSL certificateFlex • License files • VirtualCenter Configuration file • Optionally -upgrade files Additionally, each ESX Server stores the IP address of the VirtualCenter Server in the agent configuration file • IP address change is necessary to bring the standby VirtualCenter Server in production DR for VirtualCenter – Solution Design DR for VirtualCenter - Disaster Recovery Active / Active with VMware HA – Solution Design Active / Active with VMware HA Solution Design Disaster Recovery Active / Passive DR Site – Solution Design Active / Passive DR Solution Design Disaster Recovery Guest OS Storage Replication – Solution Design Guest OS Storage Replication Solution Design Disaster Recovery Network Reconfiguration –Solution Design Network Reconfiguration Solution Design Disaster Recovery Solution Blocks – Outline Questions? Thank You !!
