Overview of stretched clustering in VSAN 6.1. Check out the video of this deck being presented here: https://www.youtube.com/watch?v=AF6lbOEeTzo

1. © 2014 VMware Inc. All rights reserved.
VSAN 6.1
Stretched Clustering Overview

2. Virtual SAN Stretch Cluster
2
Enterprise Availability and
Data Protection
 Stretched Cluster with
RPO=0, metro-distance
 5 min RPO vSphere
Replication
 Support for SMP-FT
 Support for Oracle RAC
 Support for Microsoft
Failover Clustering
– Increases Enterprise availability and data protection
– Deploy Virtual SAN between geographically dispersed locations
– Based on an Active–Active architecture
– Supported on both Hybrid and All-Flash architectures
– Enables synchronous replication of data between sites
– Site failure tolerated, with no data loss and near zero downtime
Site A
Active
Site B
Active
vSphere + Virtual SAN
Stretched ClusterHDDSSD HDDSSD HDDSSD HDDSSD HDDSSD HDDSSD

3. Stretch Cluster Based on vSphere and Virtual SAN Technologies
3
– Stretched Cluster is based on Virtual SAN’s 3 Fault Domain architecture
– Functions and managed just like any other Virtual SAN cluster
– Witness responsible for quorum and voting mechanism during cluster related failures
– the witness is an ESXi virtual appliance
– Witness only stores meta-data, no running VMs
Fault Domain A
Active
Fault Domain C
Active
vSphere + Virtual SAN
Stretched Cluster
HDDSSD HDDSSD HDDSSD HDDSSD HDDSSD HDDSSD
Witness
Fault Domain B
HDD SSD
Enterprise Availability and
Data Protection
 Stretched Cluster with
RPO=0, metro-distance
 5 min RPO vSphere
Replication
 Support for SMP-FT
 Support for Oracle RAC
 Support for Microsoft
Failover Clustering

4. Virtual SAN Stretch Cluster
4
– Witness appliance can be deployed onto a 3rd site or it can be hosted on vCloud Air
– Stretched cluster introduces fault domain/site Read Locality
– vSphere enterprise features are seamlessly integrated and supported
– vSphere Distributed Resource Scheduler (DRS)
– vSphere High Availability (HA)
Site A Site B
vSphere + Virtual SAN
Stretched ClusterHDDSSD HDDSSD HDDSSD HDDSSD HDDSSD HDDSSD
< 5 ms latency over >10/20/40 gbps
Active Active
witness
appliance
L2 with Multicast
Fault Domain A Fault Domain C
Fault Domain B
Enterprise Availability and
Data Protection
 Stretched Cluster with
RPO=0, metro-distance
 5 min RPO vSphere
Replication
 Support for SMP-FT
 Support for Oracle RAC
 Support for Microsoft
Failover Clustering

5. Any distance >5 min RPO
Enhanced Replication with vSphere Replication and SRM
5
– Replication between Virtual SAN datastores enables RPOs as low as 5 minute
– 5 minutes RPO is exclusively available to Virtual SAN 6.x
site a
vSphere + Virtual SAN
Stretched Cluster
< 5 ms latency over >10/20/40 gbps
Active Active
site b
L2 with Multicast
site x
vSphere + Virtual SAN
VR
DR
vCenter
vCenter
witness
appliance
SRM
SRM
Enterprise Availability and
Data Protection
 Stretched Cluster with
RPO=0, metro-distance
 5 min RPO vSphere
Replication
 Support for SMP-FT
 Support for Oracle RAC
 Support for Microsoft
Failover Clustering

6. Any distance >5 min RPO
Virtual SAN Stretch Cluster with vCloud Air Disaster Recovery
6
– vSphere Replication is the replication engine for vCloud Air Disaster Recovery
site a
vSphere + Virtual SAN
Stretched Cluster
< 5ms RTT over 10/20/40 gbps
Active Active
site b
L2 with Multicast
vCloud Air
VR
vCenter
witness
appliance
VCD
Enterprise Availability and
Data Protection
 Stretched Cluster with
RPO=0, metro-distance
 5 min RPO vSphere
Replication
 Support for SMP-FT
 Support for Oracle RAC
 Support for Microsoft
Failover Clustering

7. Three Ways to Get Started with Virtual SAN Today
7
VSAN
Assessment32Download
Evaluation
Online
Hands-on Lab1
• Test-drive Virtual SAN right
from your browser—with an
instant Hands-on Lab
• Register and your free, self-
paced lab is up and running
in minutes
• 60-day Free Virtual SAN
Evaluation
• VMUG members get a 6-
month EVAL or 1-year
EVALExperience for $200
• Reach out to your VMware
Partner, SEs or Rep for a FREE
VSAN Assessment
• Results in just 1 week!
• The VSAN Assessment tool
collects and analyzes data from
your vSphere storage
environment and provides
technical and business
recommendations.
Learn more…
vmware.com/go/virtual-san
• Virtual SAN Product
Overview Video
• Virtual SAN Datasheet
• Virtual SAN Customer
References
• Virtual SAN Assessment
• VMware Storage Blog
• @vmwarevsan
vmware.com/go/try-vsan-en vmware.com/go/try-vsan-en