High Availability in a Virtualised World
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Leaders Have Vision™ visionsolutions.com 1
High Availability in a Virtualised World
Mark AdamsDistribution Manager UK&I
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WHO IS DOUBLE-TAKE SOFTWARE?
Since 2010 part of VISION SOLUTIONSFounded 1991 as NSI SoftwareHQ in Irvine, CaliforniaFocused on- High Availability- Disaster Recovery- Server Migration- Systems Management
Worldwide 700 Employees (80 EMEA)20.000 Customer with 190.000 InstallationsPartnership with Microsoft, VMware, Dell, HP...24/7 Support
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Leaders Have Vision™ visionsolutions.com 4
Leaders Have Vision and Vision Has Leaders
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Virtualisation and Availability
• Virtualisation Benefits.......
• Virtualisation brings its own availability tools • But virtualisation could be its own worst enemy
when it comes to availability
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VMware tools
• the VMotion® and Storage VMotion functionality in vSphere makes it possible for organisations to dramatically reduce planned downtime
• VMware HA provides rapid recovery from outages– shared storage is a single point of failure– local availability only
• VMware fault tolerance provides continuous availability– shared storage is a single point of failure– local availability only
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Hyper-V tools
• Hyper-V™ live migration allows you to move running VMs from one Hyper-V™ physical host to another
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Hyper-V tools
• failover clustering at the Hyper-V host level– shared storage is a single point of failure– local availability only
• clustering at the Hyper-V guest level– shared storage is a single point of failure– local availability only
• clustering at the Hyper-V guest level on a single physical server– Physical server is a single point of failure– shared storage is a single point of failure– local availability only
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Virtualisation disadvantage?Some HA techniques and technologies, however,
outstrip the capabilities of virtualisation platforms
• what do you do if you run more than one hypervisor?
• how do you protect a mixed Physical and Virtual environment?
• what do you do for DR?
• what happens if you use more than one storage platform or vendor?
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Is This Your Real Environment?
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Enterprise Environments…
SAN
NAS/iSCSI
NAS/iSCSI Array
VM Volumes
ESX
WAN
Hype
r-V
DB1
DB2
DB3
DB4
DB1
DB2
DB3
DB4
Exchange DatabaseVolumes (DAG)
ExchangeCluster
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DB1
DB2
DB3
DB4
DB1
DB2
DB3
DB4
Exchange DatabaseVolumes (DAG)
Passive
Active
Client Access Server
DB1
DB2
DB3
DB4
WAN
Double-Take DAG Protection
ExchangeCluster
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App_Svr_1 App_DR_3
The source image is mirrored to the target server
After reboot, the target server now has the identity and data of the original source
At failover time, the system state of the source is merged with the target server
Real-time Replication continuously protects the source
Custom App
Custom App
Data Data
Custom App
App_Svr_1
If App_Svr_1 goes down, will failover to App_DR_3.
Double-Take Full Server Failover
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App_Svr_1App_DR_3
The application and data are mirrored to the new target server
– Source and Target swap roles.– Subsequent Failover will move App_Svr_1 back to the original source server. – This same “Reverse” technology also works for VMware ESX VM’s
On Reverse, the system state of the original target is merged with the original source server
Real-time Replication continuously protects the source
Custom App
Data
Custom App
App_Svr_1
The original source comes back on line.
Data
Double-Take Full Server Reversal
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Enterprise Environments…
SAN
NAS/iSCSI
NAS/iSCSI Array
VM Volumes
ESX
WAN
Hype
r-V
DB1
DB2
DB3
DB4
DB1
DB2
DB3
DB4
Exchange DatabaseVolumes (DAG)
ExchangeCluster
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Hype
r-V
Hype
r-V
Double-Take Host Agent Double-Take Host Agent
WAN
ESX
Hype
r-V
Double-Take Guest Agent Double-Take Guest Agent
WAN
Double-Take for Virtual Servers
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C:Replicated
E: NotReplicated
D: Replicated
Web_1
..\source\C\
..\source\D\
C:\
Protection to a Hyper-V or ESX hostOnly the VRA Helper is pre-configured
Virtual Recovery Assistant
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Virtual Recovery Assistant
C:\
C:\
D:\
Web_1C:Replicated
E: NotReplicated
D: Replicated
Protection to a Hyper-V or ESX hostOnly the VRA Helper is pre-configured
Source isshut down
Recovery VMis started up
Web_1
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Leaders Have Vision™ visionsolutions.com 19
Enterprise Environments…
SAN
NAS/iSCSI
NAS/iSCSI Array
VM Volumes
ESX
WAN
Hype
r-V
DB1
DB2
DB3
DB4
DB1
DB2
DB3
DB4
Exchange DatabaseVolumes (DAG)
ExchangeCluster
Virtual
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Physical. Virtual. Cloud.
Solutions for availability, backup and migration in physical, virtual, and cloud environments
Cloud
Virtual
Physical
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• Platform Independent Replication
• Migration - Move
• Virtual Availability
• Enterprise Protection
• Virtual Recovery Assistant
Recap and Questions
Physical
Cloud
Virtual
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Leaders Have Vision™ visionsolutions.com 22
Coming Soon
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Double-Take Virtual Recovery Appliance
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visionsolutions.com 26Leaders Have Vision™ visionsolutions.com 26
Questions?
Questions
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Follow Vision On Popular Social Networks
visionsolutions.com
businesscontinuitytoday.com
twitter.com/VSIDTInfo
facebook.com/vsichannel
youtube.com/vsichannel
linkedin.com/companies/6542
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Multi-VM Protection