Category Archives: vmsc

How to test failure scenarios!


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Almost on a weekly basis, I get a question about unexpected results during the testing of certain failure scenarios. I usually ask first if there’s a diagram that shows the current configuration. The answer is usually no. Then I would ask if they have a failure testing matrix that describes the failures they are introducing, […]

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Posted in BC-DR, failure scenario, Server, Software Defined, Storage, test, testing, Virtual SAN, vmsc, VMware, vsan, vSphere | Comments Off on How to test failure scenarios!

New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)


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I had many requests for an updated version of this paper, so the past couple of weeks I have been working hard. The paper was outdated as it was last updated around the vSphere 6.0 timeframe, and it was only a minor update. I looked at every single section and added in new statements and […]

New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, emc, metro, metro cluster, netapp, Storage, stretched, stretched cluster, vmsc, VMware, vplex, vSphere, vsphere metro storage cluster | Comments Off on New whitepaper available: vSphere Metro Storage Cluster Recommended Practices (6.5 update)

VMs not getting killed after vMSC partition has lifted


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I was talking to a VMware partner over the past couple of weeks about challenges they had in a new vSphere Metro Storage Cluster (vMSC) environment. In their particular case they simulated a site partition. During the site partition three things were expected to happen: VMs that were impacted by APD (or PDL) should be killed […]

VMs not getting killed after vMSC partition has lifted” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, ha, metro, metro cluster, Software Defined, Storage, vmsc, vSphere, vsphere metro storage cluster | Comments Off on VMs not getting killed after vMSC partition has lifted

vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher


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I have discussed this topic a couple of times, and want to inform people about a recent change in recommendation. In the past when deploying a stretched cluster (vMSC) it was recommended by most storage vendors and by VMware to set Disk.AutoremoveOnPDL to 0. This basically disabled the feature that automatically removes LUNs which are […]

vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, BC-DR, Server, Storage, stretched cluster, u1, u2, vmsc, VMware, vSphere, vsphere metro storage cluster | Comments Off on vMSC and Disk.AutoremoveOnPDL on vSphere 6.x and higher

SMP-FT and (any type of) stretched storage support


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I had a question today around support for SMP-FT in an EMC VPLEX environment. It is well known that SMP-FT isn’t supported in a stretched VSAN environment, but what about other types of stretched storage? Is that a VSAN specific constraint? (Legacy) FT appears to be supported for VPLEX and other types of stretched storage? SMP-FT is […]

SMP-FT and (any type of) stretched storage support” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, smp-ft, Storage, vmsc, VMware, vplex, vSphere | Comments Off on SMP-FT and (any type of) stretched storage support

Stretched Clusters: Disable failover of specific VMs during full site failure


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Last week at VMworld when presenting on Virtual SAN Stretched Clusters someone asked me if it was possible to “disable the fail-over of VMs during a full site failure while allowing a restart during a host failure”. I thought about it and said “no, that is not possible today”. Yes you can “disable HA restarts” […]

Stretched Clusters: Disable failover of specific VMs during full site failure” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, 6.0u1, BC-DR, Server, Software Defined, Storage, Virtual SAN, vmsc, vsan, vsphere metro storage cluster | Comments Off on Stretched Clusters: Disable failover of specific VMs during full site failure