Protecting Physical and Virtual Machines with Double-Take Virtual Recovery Assistant by Andy Ebbs

1. Protecting Physical and Virtual
Machines with Double-Take
Virtual Recovery Assistant
Andy Ebbs
Solution Architect
andy.ebbs@visionsolutions.com
+44 1905 728 023
+44 7917 326 602
Leaders Have Vision™ visionsolutions.com 1

2. WHO IS DOUBLE-TAKE SOFTWARE?
Since 2010 part of VISION SOLUTIONS
Founded 1991 as NSI Software
HQ in Irvine, California
Focused on
- High Availability
- Disaster Recovery
- Server Migration
- Systems Management
Worldwide 700 Employees (80 EMEA)
20.000 Customer with 190.000 Installations
Partnership with Microsoft, VMware, Dell, HP...
24/7 Support
Leaders Have Vision™ visionsolutions.com 2

3. Core Protection Products
Leaders Have Vision™ visionsolutions.com 3

4. Physical. Virtual. Cloud.
Cloud
Physical
Virtual
Solutions for availability, backup and migration in
physical, virtual, and cloud environments
Leaders Have Vision™ visionsolutions.com 4

5. DOUBLE - TAKE SOFTWARE Solutions
Replicate anything to anything (hardware, application,
hypervisor independent)
Replicate anywhere to anywhere (unlimited
distance, very low bandwidth consumption)
Restart production in less than few
minutes // Restore Full Server or single
Object // Hardware migration
Leaders Have Vision™ visionsolutions.com 5

6. Leaders Have Vision™ visionsolutions.com 6

7. Technologies to make Availability Work
• Real-time Replication
– Data consistency
– Hardware & application independent
– Designed for WAN use
Leaders Have Vision™ visionsolutions.com 7

8. HOW DOES IT WORK?
User application
Double-Take
Application Double-Take Application service
layer service layer
Double-Take Double-Take
driver driver
Operating Operating
system An initial mirror copies all system
of the data to the target
HDD HDD
Hardware Hardware
layer layer
Leaders Have Vision™ visionsolutions.com 9

9. HOW DOES IT WORK?
User application
Double-Take
Application Double-Take Application service
layer service layer
Double-Take Double-Take
driver driver
Operating Operating
system system
The Double-Take
As confirmation of the
driver sees bytes of I/O
write travels back to the
en route to the file
application, Double-Take
HDD system and copies HDD
Hardware  then sends the bytes to Hardware
layer them into memory layer
the target
Leaders Have Vision™ visionsolutions.com 10

10. HOW DOES IT WORK?
User application
Double-Take
Application Double-Take Application service
layer service layer
Double-Take Double-Take
driver driver
Operating Operating
system system
During high-latency
If configurable memory
periods, Double-Take
Disk
will bufferare exceeded,
buffers changes to
Queue Double-Take will buffer
memory
HDD
to disk for additional HDD
Hardware latency tolerance Hardware
layer layer
Leaders Have Vision™ visionsolutions.com 11

11. HOW DOES IT WORK?
User application
Double-Take
Application Double-Take Application service
layer service layer
Double-Take Double-Take
driver driver
Operating Operating
system system
Once latency
improves, replication
Disk
resumes transmission,
HDD
Queue preserving write-order
consistency HDD
Hardware Hardware
layer layer
Leaders Have Vision™ visionsolutions.com 12

12. REPLICATION
• STAR Technology (Sequential Transfer Asynchronous
Replication)
• All changes are transmitted on Byte-Level
• Support of NTFS, FAT / EXT2/3/4, Reiser filesystems
• Only change- and write operations are monitored
• Granular selection of data (File/Folder/Partition, wildcard
support)
• Minimum performance loss on the source server
• Live filesystem on target server
• Multi-NIC support (dedicated replication NIC)
• Three levels of intelligent data compression
• Bandwidth management
Leaders Have Vision™ visionsolutions.com 13

13. Fits Any Environment
Physical One-to-One Physical One-to-Many VM Failover
Single Server Physical Many-to-One P2V Failover
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14. Technologies to make Availability Work
DATA Replication DATA‘
APP APP
OS Monitor OS
• Application Management
– Exchange, SQL, SharePoint
wizard configuration
– Supports cluster protection and
Geocluster solution
– Failover and Failback
Leaders Have Vision™ visionsolutions.com 15

15. Technologies to make Availability Work
DATA DATA‘
Replication
APP APP‘
OS Monitor OS‘
OS
• Full Server Protection
– OS + Application + Data
replication
– No application and maintenance
on target environment
– Failover & Failback
Leaders Have Vision™ visionsolutions.com 16

16. FULL SERVER PROTECTION
BES_01 BES_01
DR_01
Recovery Server
Production Recovery Server
Reboots and
Server becomes identical
Basic Windows file
to source server
server
Staged information
Staging overwrites system
Directory configuration (non-
hardware)
Leaders Have Vision™ visionsolutions.com 17

17. Technologies to make Availability Work
• Server portability & On
demand DRP
– Protect entire Windows servers
and failover to any platform
– Dissimilar hardware support
– ESX or Hyper-V VMs auto-
provisioning
– Efficient replication enables
remote VM availability
– P2P, P2V, V2P, V2V …
Leaders Have Vision™ visionsolutions.com 18

18. VIRTUAL RECOVERY ASSISTANT
Source 1
VRA Helper
Drive C
Replication Source1_Replica (offline)
Drive D
Source 2 source_c.vmdk
Monitor
source_d.vmdk
Source2_Replica - Online
(offline)
Drive c ESX / Hyper-V
Target VM is automatically provisioned source2_c.vmdk
Real-time Replication
No OS/Application licensing on target
Supports Windows 2003-2008 R2 sources
Hyper-V or ESX
Leaders Have Vision™ visionsolutions.com 19

19. MIXED PROTECTION – Physical & Virtual
Replication
VRA Helper VRA Helper
Monitor
Source1_Replica (offline) Source1_Replica - Online
source_c.vmdk
source_c.vmdk
source_d.vmdk
source_d.vmdk
Source2_Replica (offline)
Source2_Replica - Online ESX / Hyper-V
ESX / Hyper-V
source2_c.vmdk
source2_c.vmdk
Source3_Replica (offline)
Source 3 Replication
source3_c.vmdk
Monitor
Drive c
Leaders Have Vision™ visionsolutions.com 20

20. Technologies to make Availability Work
• Host-Level Protection
– Hyper-V host protection with
real-time replication
• Add remote availability to a
Hyper-V HA cluster
• Crossed Hyper-V High-
Availability
– ESX host protection with
• Host level management
• Guest installation
Leaders Have Vision™ visionsolutions.com 21

21. HOST-LEVEL Hyper-V
Replication
Monitor
Replication of the complete VM
OS & hardware Independent
No software installation within the VM
Support of Microsoft Hyper-V (incl. core edition)
NEW: Support of Hyper-V Cluster-to-Standalone
Leaders Have Vision™ visionsolutions.com 22

22. HOST-LEVEL ESX
Double-Take
Service
vCenter
Replication
Monitor
Snapshot based replication of the complete VM
OS & hardware Independent
No software installation within the VM
Support of VMware ESX (no ESXi)
Leaders Have Vision™ visionsolutions.com 23

23. Windows & Linux Comparison
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24. Leaders Have Vision™ visionsolutions.com 25

25. Virtual Recovery Appliance
Virtual Recovery Appliance
Windows Server ESX Host
Windows_Replica
Linux Server Linux_Replica
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26. Q&A
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27. Thank you!
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