Solved

Purpose of Vmware Stretched Cluster

Posted on 2016-11-06
4
94 Views
Last Modified: 2016-11-11
Some environments use  Vmware Stretched cluster for disaster recovery.
- the only way I see it helpful, is when VM Fault-tolerance is enabled. Because if VMs keep Vmotioning between sites then we might see Latency.
If VM keeps replicating to another VM via Fault-tolerance feature, then if  Site A goes down, that will make sense to have similar VM on siteB with exact data to use.

- if you stretch a cluster, I believe you still need to configure VM-ESX host affinity
 
any EE to elaborate on this ?
 
Thank you
stretch.JPG
0
Comment
Question by:jskfan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 121

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41876194
If either Datacenter A or Datacenter B is destroyed or unavailable, you can immediately be back ONLINE, with 1-2 minutes. (if using FT then no downtime).

(depending on replication times between SAN, e.g, constant replication)

Also simplifies networking, DR, no real requirement for failover and failback software, SRM...

So speed of Recovery and Business Continuity.
1
 

Author Comment

by:jskfan
ID: 41878710
By the way, when 2 VMs are in Fault-tolerance(one replicates to the other), one in Production site and one in DR site. I believe they should have the same name, so that clients will reach the VM in the DR site the same way they used to reach the VM in the production site. I was just wondering when both sites are up and 2 VMs with the same DNS name, would this be an issue ?
0
 
LVL 121

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41878751
By the way, when 2 VMs are in Fault-tolerance(one replicates to the other), one in Production site and one in DR site. I believe they should have the same name, so that clients will reach the VM in the DR site the same way they used to reach the VM in the production site. I was just wondering when both sites are up and 2 VMs with the same DNS name, would this be an issue ?

Although two VMs exist one is Primary and one is Secondary, the Secondary only becomes active, when the primary fails.

So there will never be an issue with two DNS names and IP Addresses conflicting. it cannot happen.
0
 

Author Closing Comment

by:jskfan
ID: 41884193
Thank you
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

HOW TO: Connect to the VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere (HTML5 Web) Host Client 6.5, and perform a simple configuration task of adding a new VMFS 6 datastore.
Veeam Backup & Replication has added a new integration – Veeam Backup for Microsoft Office 365.  In this blog, we will discuss how you can benefit from Office 365 email backup with the Veeam’s new product and try to shed some light on the needs and …
Teach the user how to rename, unmount, delete and upgrade VMFS datastores. Open vSphere Web Client: Rename VMFS and NFS datastores: Upgrade VMFS-3 volume to VMFS-5: Unmount VMFS datastore: Delete a VMFS datastore:
This Micro Tutorial steps you through the configuration steps to configure your ESXi host Management Network settings and test the management network, ensure the host is recognized by the DNS Server, configure a new password, and the troubleshooting…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question