Difference between HA 'Cluster' App and 'Mirror' App

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Wizard
Posts: 2
Joined: Sun Sep 18, 2011 4:19 am

Difference between HA 'Cluster' App and 'Mirror' App

Post by Wizard » Sun Sep 18, 2011 4:36 am

Hello,

I am struggling to see the difference between a 'Cluster' defined application and a 'Mirror' application.

Both are mounted via the iSCSI initiator in the OS and presented as a new disk in the Storage Manager of the OS (as a single disk if MPIO is installed and selected during the iSCSI connection setup).

This disk is then available for discovery in Hyper-V which it can be used as Quorum or CSV purposes if I am correct?

Could someone please clarify the diffecences and usage scenarion for a clearer understanding... As it is the difference between the Standard and Ultimate edition.

Also... Is there any reason why the Software cannot be installed on the Hyper-V Cluster 'Host' Nodes without needing two SAN nodes seperately?

Thanks,

Martin

Matt
Posts: 24
Joined: Thu Feb 17, 2011 10:53 pm
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Re: Difference between HA 'Cluster' App and 'Mirror' App

Post by Matt » Mon Sep 19, 2011 6:30 pm

Hello Martin,

For questions about differences between HA Cluster and Mirror application in iStorage Server, please refer to your different topic where Olivia already reply to you.

viewtopic.php?f=5&t=2113&sid=17ac84dfbb ... e5bb#p2607

Wizard wrote:Hello,

[...]
Also... Is there any reason why the Software cannot be installed on the Hyper-V Cluster 'Host' Nodes without needing two SAN nodes seperately?

Thanks,

Martin
Can you please explain what you have on mind?

Olga-SAN
Posts: 6
Joined: Fri Mar 04, 2011 12:33 pm

Re: Difference between HA 'Cluster' App and 'Mirror' App

Post by Olga-SAN » Tue Sep 20, 2011 12:41 pm

Performance is not good at all if both target and hypervisor are run on the same host. And worst migration (vMotion or Live Migration or XenMotion) is not guaranteed. May work and may not work when needed. So maybe that's why dedicated hardware for SAN is required.
Wizard wrote:Hello,

I am struggling to see the difference between a 'Cluster' defined application and a 'Mirror' application.

Both are mounted via the iSCSI initiator in the OS and presented as a new disk in the Storage Manager of the OS (as a single disk if MPIO is installed and selected during the iSCSI connection setup).

This disk is then available for discovery in Hyper-V which it can be used as Quorum or CSV purposes if I am correct?

Could someone please clarify the diffecences and usage scenarion for a clearer understanding... As it is the difference between the Standard and Ultimate edition.

Also... Is there any reason why the Software cannot be installed on the Hyper-V Cluster 'Host' Nodes without needing two SAN nodes seperately?

Thanks,

Martin

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