Tag Archives: HA

vSphere Metro Storage Cluster (vMSC) and partially connected datastores?

vSphere Metro Storage Cluster (vMSC) and no identical hosts - local not replicate storage

vSphere Metro Storage Cluster (vMSC) is a certified (you should always check/verify compatibility on VMware Storage Compatibility Guide) configuration for stretched storage (synchronized replication) cluster architectures. As I already described, there are possible two vMSC configurations based on how the hosts are connected to the storage arrays. The below figure presents uniform host access configuration… Read More »

What is VM Component Protection (VMCP) introduced with vSphere 6?

I attended at the great session during the VMworld Europe: INF5898 - vSphere High Availability (HA) Best Practices. VMware introduced a new useful feature with vSphere 6.0 - VM Component Protection. This is a new option of VMware HA that protects VMs from Permanent Device Loss (PDL) and All Paths Down (APD). This post covers… Read More »

How to calculate VMware HA Admission Control for unbalanced vSphere cluster?

Yesterday I received an email with the following question: how to calculate VMware HA Admission Control for unbalanced vSphere cluster? Just for a quick reminder, Admission Control is used to ensure that sufficient resources are available in a cluster to provide failover protection and to ensure that virtual machine resource reservations are respected. I already… Read More »