VMware vSphere 6.5 Announced !! Today

vSphere 6.5 introdcue Virtual Hardware version13 , VM up to 6TB of memory 🙂 also UEFI secure boot for guest OS as well.

Main advantages are;

  • Easily backup/restore vCSA
  • Easy to migrate from Windows vCenter (5.5 or 6.0) to VCSA 6.5
  • Easily to run the VCSA Installer from Windows, MAC, Linux
  • Install, Upgrade, Migrate, Restore

VMware vSphere 6.5 Fault Tolerance (FT)  improvements;

VMware Fault tolerance (FT)  vLockstep technology, which had been replaced in vSphere 6.0 by another technology called fast checkpointing. The primary VM has to acknowledge the changes made within the secondary VM, so latency was an issue for apps which requires low latency. latency has dropped compared to the 6.0 release, by up to 10x.

Simplified HA Admission Control Settings and has been changed;

  • The new default is Cluster resource Percentage – The configuring workflow for admission control is a little bit simpler. You first define a parameter how many failed hosts you want to tolerate within your cluster, and the system will do the math for you. As default HA cluster admission policy, VMware will use the cluster resource Percentage now. (previously host failures the cluster tolerates policy, was used).
  • Override Possible – You can override the default CPU and memory settings if needed. (25% as in previous releases).

If you add/remove hosts from within your cluster, the calculations will be done again and you’ll know what’s changed.

  • Performance degradation Warning message – Previously HA could restart VM, but those would suffer from performance degradation. This is now prevented with a warning message. You’ll be warned if performance degradation would occur after an HA even for particular VM(s)


DRS integration for FT protected VMs are improved in vSphere 6.5;

  • Network bandwidth which influences host rankings – The system will look into a network throughput and those metrics are taken into account when decisions are taken where to run a secondary VM.
  • Ranks datastores for secondary VM – able to choose to which datastore will place the secondary VM. The ranking will be based on the space available on the datastore, so you’ll have to choose not only a host where to run the secondary VM, but also a datastore where to place the VMDK.

Native HA option – It is an Active-Passive solution with Witness in between. Without the need to use any external software we can setup an active-passive HA.

Also VUM is part of VCSA 6.5



VMware vCSA and PSC Installation Process now in 2 steps

  • Stage 1 – Deployment of the OVF
  • Stage 2 – All the configuration of the solution


Upgrade to VCSA 6.5

Migration – migratration from 5.5 to 6.0 into the 6.5. In VCSA 6.5 will be possible to migrate from 5.5 OR 6.0 with a possibility to retain the certificates, FQDN, UUID, IP address. So in case you have some third party software which rely on vCenter, it won’t see any difference. The migrated vCenter server will have the same appearance.

Note that only migration to VCSA 6.5 (Linux) will be possible.

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