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We're going to get started by talking about what is Volume Shadow Copy Services. What is this thing that's called VSS? Then we are going to talk about why should I use VSS? We are going to move on to talk about the different components that make up VSS so that you can understand it from an architectural standpoint and know how these components talk to each other and tie into one another. Then we're going to take a look at how native operating systems do VSS, how a native Windows operating system that's installed on physical machines, by the way does that still exist physical machines? What is a physical machine?
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Backing up Enterprise Applications: Transaction Consistency is Key
Elias Khnaser
www.eliaskhnaser.com
Twitter: @ekhnaser
About Elias Khnaser
Agenda
What Is Volume Shadow Copy Services (VSS)?
Why VSS?
VSS Components
Native Operating System VSS Backup
VMware vSphere 4.x Backups
Agent Assisted VSS Aware Backups
How Volume Shadow Copies Are Created
Agent Assisted VSS Aware Restore
What is Volume Shadow Copy Services (VSS)?
VSS is Windows framework for application backups VSS is a built-in Windows service that facilitates and
coordinates the creation of consistent copies of Transaction-based application data
2 methods for creating Shadow Copies:● Clone (Full Clone/Split Mirror)● Copy-on-Write (Difference File)
Exchange SQL Active Directory More
Transaction-based applications
Why VSS?
Avoid crash-consistent backups Crash-consistent is a nice way of saying hard stop Application awareness Avoidance of manual post restore tasks
Application consistency is critical
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
VMWindows
Restore
Backup
VSS Components Volume Shadow Copy Service is a service that coordinates
the function of all components to create the shadow copy Requestors initiate Shadow Copy Creation Writers prevent data inconsistency Providers create the Shadow Copy
● System Provider● Hardware Providers● Software Providers
Source Volume is the volume that contains the data to be shadowed
Storage Volume is the volume that holds the shadow copy
A number of providers available
Native Operating System VSS Backup
Volume Shadow Copy ServiceWriters Requestor
ProviderSQL, Exchange,Active Directory,
Oracle, SharePoint
Backupsoftware
Operatingsystem, storage array or system
provider
Disk Volume
VMware vSphere 4.x Backups VMware Tools doesn’t quiesce applications May impact recovery
Volume Shadow Copy ServiceWriters Requestor
ProviderSQL, Exchange,Active Directory,
Oracle, SharePointVMware Tools
Operatingsystem, storage array or system
providerDisk
Volume
ESXi Host
VMware Tools is for quiescing filesystem with VSS
Image level backup that is crash consistent
Disk Volume
Agent Assisted VSS Aware Backup
Application jungle requires comprehensive solution
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
Windows
VM
WindowsRestore
Backup
VM
Windows
VM
Windows
VM
Windows
VM
Windows
Backup File system consistent
Applicationconsistent
Application consistent recovery made easy with VSS agent
Not a traditional agent that needs updating and management
Agent Assisted VSS Aware Backup
Application consistent recovery made easy with VSS agent
Not a traditional agent that needs updating and management
Volume Shadow Copy ServiceWriters Requestor
ProviderSQL, Exchange,Active Directory,
Oracle, SharePointVMware Tools
Operatingsystem, storage array or system
provider
Disk Volume
ESXi HostOn-Demand
Assistive Agent
3rd PartyBackup Host
Disk Volume
Agent Assisted VSS Aware Restore
VSS aware restore is critical
Properly initialize VM on startup
Restore
Backup
VMWindows Domain controller example
VMWindows Exchange example
What We Covered
What Is Volume Shadow Copy Services (VSS)?
Why VSS?
VSS Components
Native Operating System VSS Backup
VMware vSphere 4.x Backups
Agent Assisted VSS Aware Backups
Agent Assisted VSS Aware Restore
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