© 2010 VMware Inc. All rights reserved

VMware Data Recovery- wie konfiguriere ich meine BackupRüdiger Melzer, Sr. Systems Engineer, VMware Deutschland

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43% of companies experiencing disasters never re-open, and 29% close within two years

(McGladrey and Pullen)

93% of business that lost their data center for 10 dayswent bankrupt within one year

(National Archives & Records Administration)

40% of all companies that experience a major disasterwill go out of business if they cannot gain access

to their data within 24 hours(Gartner)

Top executives say 10 hours to recovery;IT managers say up to 30 hours

(Harris Interactive)

Disasters Happen. Do You Need Protection?

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IntroductionBusiness Continuity and how could VMware help you

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Business Continuity As An Infrastructure Service For All Apps

Resource Pool

vSphere vSphere vSphere

Local Site Failover Site

• vCenter Site Recovery Manager

• MetroClustering

• VMware High Availability (app-aware)• VMware Fault Tolerance

• VMotion

• VMware Data Recovery• vStorage APIs for Data Protection

Resource Pool

vSphere vSphere

Dev /Test

Dev /Test

Dev /Test

Disaster RecoveryLocal Availability

Data Protection

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• Application and OS independent • Focus on simplicity, cost-efficiency

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Local Availability Disaster Recovery

VMware Business Continuity Pillars

Data Protection

X

Reliable Platform

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IntroductionConsiderations for Disaster Recovery (RPO vs RTO)

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Disaster Recovery Concepts

SecsMinsHrsDaysWks Secs Mins Hrs Days Wks

Recovery Point Recovery Time

Recovery Point Objective (RPO)Point in time to which data must be recovered (i.e. how old can the data be?)

Recovery Time Objective (RTO)Time required to complete recovery of the application and it’s data

Disaster Strikes

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Backup

SecsMinsHrsDaysWks Secs Mins Hrs Days Wks

Recovery Point Recovery Time

Recovery Point Objective (RPO)

Synchronous Replication

Periodic Replication

Asynchronous Replication

Disaster Strikes

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Restore

SecsMinsHrsDaysWks Secs Mins Hrs Days Wks

Recovery Point Recovery Time

Recovery Time Objective (RTO)

Recovery Time includes: Fault detection

Recovering data

Bringing apps back online

Automated Migration Manual

Migration

vCenter Site Recovery Manager

Disaster Strikes

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Remember why we do backups in the first place…

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Restore requirements dictate backup methods RTO is impacted by the speed and ease with which you can recover the

system successfully AND consistently

Will the application be ready to run once restored or do you need to check consistency/replay transaction logs first? How long?

Backup to/restore from disk vs tape maybe required

Restore over SAN vs over LAN vs over WAN

Remote offices may use a Data Recovery Appliance locally, which can dedupethen replicate back to H/O more efficiently across the WAN to meet requirements of both offsite backup AND RTO

And so on…

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What Data Protection Options do I Have in a Virtual World?

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VM Data Protection Options

Method Description

Backup Application via LAN

• Backup agent in each Guest OS• LAN-based backups• Guest OS file-level backups• Same method as backing up physical servers

SAN-Based Backup/Replication• Back up via SAN storage array replication tool• Back up all VMs in entire VMFS datastore volume• VM-level backups

Backup Application integratedwith VMware vStorage API

• Single backup agent in proxy (consolidated backup)• LAN-based or LAN-free backups• Guest OS file-level backups or VM-level backups

VMware Data Recovery• VMware implementation of backup application integrated

with VMware vStorage API• Ideal for small/medium businesses

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Backup Application via LAN

Traditional Backup/Restore Application• Backup agent inside Guest OS

• File-based backup and restore

• LAN-based

• Concurrent backups of VMs on same host can magnify load

Backup Agent

Backup Application Server

LAN

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SAN-Based Backup/Replication

Storage Array-Based Tool• Takes snapshot of entire LUN

• Each LUN contains one or more VMFS datastores

• Each VMFS datastore contains one or many VMs

LUN LUN LUN LUN LUN

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VMware vStorage API

VM Backup• Leverages VM snapshots for full and incremental backups

• No agent inside Guest OS

• Supports all storage architectures

Integration• Native integration with enterprise backup solutions

• Evolution of VCB

• Deployable on Windows or Linux

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VMware vStorage API Integration Options

VMware vCenter ServerEnterprise Backup Application UI

VMware vStorage API for Data Protection

VMware vSphere

VMware Data RecoveryEnterprise Backup Applications

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VMware Data RecoveryConcepts and Functions of a Game Changing Approach

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Overview of VMware Data Recovery Functionality

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Backups: Disk based backup, not file level (fast backup and quick restore) Any Guest OS can be backed up. A VM can be backed up even if it is suspended or powered off. Leverages VM snapshot technology and uses the SYNC driver or Microsoft VSS to

quiesce the Guest OS on a running VM. VMware Tools must be installed and running. Leverages VM Change Block Tracking (very efficient storage of backup) Uses an intuitive wizard driven workflow to create, configure and schedule backup

jobs

Restores: Can overwrite the current VM. Restore the VM if it no longer exists. Restore a ‘test’ VM which is identical to the original VM, but does not have networking

enabled – this is called a Restore Rehearsal. Multiple restore points for each VM are displayed to easily select a specific point in

time copy to restore

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VMware Data Recovery

VMware Data Recovery (vDR) Virtual Appliance• Quick, simple and complete

data protection for VMs

• VM-level backups and restore

• Centralized management through vCenter Server

• Agent-less

• Cost effective storage management through data de-duplication

• Ideal for small/medium businesses

VirtualCenter

1. Backup

2. Restore

1. VM Guest OS files deleted (user error) resulting in loss of service

2. Select VM backups to recover

3. Fast restore of VM…downtime minimized

1. Schedule backups2. Snapshots taken3. Data de-duped and stored

vCenter

vCenter

X

De-duplicatedStorage

X

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VMware Data Recovery Architecture

vSphere Client Data Recovery plug-in

vCenter Server

vDR Appliance

Backup Destination:

CIFS Network Share

Backup Destination: .vmdk in NFS

Datastore

Backup Destination:

.vmdk in VMFS Datastore

VM Source

vDR Windows/Linux CLI

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VMware Data Recovery Components

vDR Appliance• Virtual appliance in OVF format

• Leverages VMware vStorage API to discover, back up, and restore VMs

• Works with vCenter Server

vSphere Client Plug-In• Used to interact with vDR appliance

• Integrates with vSphere Client UI Wizard-driven backup/restore job creation Automatically imports vCenter VM inventory

• Requires plug-in on each vSphere Client

vSphere Client Data Recovery plug-in

vCenter ServervDR Appliance

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VMware Data Recovery Components

VM Source (for Backup)• Any VM in vCenter inventory Residing in VMFS or NFS-based datastore

• VM must be able to support VM snapshots

Supported Backup Destinations• Virtual disk attached to vDR appliance VMFS .vmdk or RDM in virtual compatibility mode NFS .vmdk

• SMB/CIFS shared storage mapped via vDR

• At least 10GB free space

• Backups stored in compressed and de-duped format

vDR Appliance

Backup Destination:

CIFS Network Share

Backup Destination: .vmdk in NFS

Datastore

Backup Destination:

.vmdk in VMFS Datastore

VMware ESX/ESXi

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VMware Data Recovery Components

vDR Windows/Linux CLI• Use to restore individual files to a Guest OS

• Runs inside Guest OS

• Restores files from a backed-up VM

• Connects to vDR appliance

vDR Appliance

VMware ESX/ESXi

vDR Windows CLI

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vDR Backup and Restore

VM Backup• Entire VM backed up, not file-level

• Uses VM snapshots, block-based cloning, and changed block tracking

• Virtual hardware 7 or 4 supported

• Any Guest OS supported Requires Windows and VMware Tools for quiescing

- SYNC driver for Windows and Microsoft VSS for applications

• VM can be in any state– even powered off or suspended

• First backup is full; subsequent are incremental

• Data de-duplication is standard and always performed

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Data De-Duplication

Techniques• Scan for identical elements (blocks)

• Store identical elements only once

• Save pointers instead of multiple copies of data

• Duplication exists when: Taking multiple backups of same VM – save only changed blocks via incremental

backups Taking backups of VMs with same Guest OS – collapse identical blocks across VMs

Benefits• Consume less disk space required for backups

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Data De-Duplication

Changed Block Tracking

All VMs running the same OS• Changed block tracking allows Data Recovery to back up only the changed blocks• De-duplication works across VMs• Helps with reduction in space consumption and storage I/O• Backs up common files once

Unique Blocks1st Full Backup – VM1

Data StreamVM1 yesterday

VM1 at 02:00

1st Full Backup – VM2VM2 yesterday

2nd Backup – VM1

VM2 at 03:00 2nd Backup – VM2

De-dupe store

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Data De-Duplication

Virtual Hardware Dependencies• Virtual hardware 7 VMs Data Recovery accesses changed block tracking on ESX/ESXi 4.x hosts to determine

if block needs to be backed up or not

• Virtual hardware 4 (legacy) VMs Virtual disks are scanned every time to determine changed blocks

De-Duplication Details• OS and application agnostic

• Offline grooming of the de-dupe store Purge, reclaim space, defragmenting, consistency checks

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Requirements

Supported Platforms• vSphere 4 (ESX/ESXi 4.0 U2, vCenter 4.x)

VMs• Virtual hardware version 4 or 7 (7 for Change Block Tracking capabilities)

• Must support VM snapshots

Backup Destination• At least 10GB free space

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Limitations

vDR Appliance• Maximum 100 VMs backed up per appliance

• Maximum 2 de-duplication stores per appliance

• Up to 10 appliance per vCenter Server supported

• Cannot reside in vApp

• Multiple appliances are independent and do not interact

Storage• Disk only – no tape/media integration

• Maximum of 1TB per de-duplication store, in total 2 TB with two stores(this is the amount of de-duplicated storage)

Backups• Maximum 8 concurrent backup and 8 concurrent restore jobs (per Appliance)

• One backup per VM allowed every 24 hours

• Appliance vCPU usage must be under 80%

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Comparing VM Backup Options

BackupApplication with

vStorage API

VMware DataRecovery (vDR)

SAN Backup/Replicat

ion

Guest OS Backup

Backup Type

• Full VM• Incremental• File-level

• Full VM (first)• Incremental

(subsequent)

• Full VM (entire VMFS)

• File-level• Full VM (all files by

file-level)• Incremental

Backup State

• Quiesced (Windows SYNC, application via VMware Tools)

• Crash-consistent

• Quiesced(Windows SYNC, application via VMware Tools)

• Crash-consistent

• Crash-consistent• Quiesced (some

are application consistent via VSS integration)

• Crash-consistent• Quiesced

(depends on application)

VM State • Powered on/off • Powered on/off • Powered on/off • Powered on only

Backup Agent • Single proxy agent • None • None • One per Guest OS

Performance Impact

• LAN-free orLAN-based

• LAN-free orLAN-based

• LAN-free • LAN-based

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Comparing VM Backup Options

BackupApplication with

vStorage API

VMware DataRecovery (vDR)

SAN Backup/Replicat

ion

Guest OS Backup

Pros

• Option for LAN-free or LAN-based backups

• Single proxy backup agent (save money)

• Integrated with enterprise backup solution

• Simple backup virtual appliance

• Integrated with vCenter 4.0

• Data de-duplication for storage efficiency

• Quick backup• LAN-free backups• No backup agent• Ideal for Disaster

Recovery

• Same method as backing up physical machines

• Restore files directly into Guest OSes

Cons

• Cannot restore files directly into Guest OS without backup agent in Guest OS

• Cannot back up files inside Guest OS individually (only entire VM)

• Limit of 100 VMs per vDR

• Cannot back up files inside Guest OS individually

• Cannot restore files directly into Guest OS

• Granularity is LUN level on Storage

• Full VM backup takes time

• Magnified network/CPU load

• One agent per Guest OS

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Where Can I Learn More?

VMware Data RecoveryProduct Page – www.vmware.com/products/data_recovery

Overview, datasheet, webinars, docs, community links

Free 60-day Evaluation – all you need to get started!

Business Continuity Solutions from VMware – www.vmware.com/solutions/continuity

VMbook on BC/DR – www.vmware.com/resources/techresources/1063

External Resources Administering VMware Site Recovery Manager book by Mike Laverick –http://www.lulu.com/content/4343147

© 2010 VMware Inc. All rights reserved

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