Creativa - Fotolia
One storage issue that occasionally proves to be problematic is vSphere 6 support for NFS 4.1. Previously, vSphere supported only NFS version 3. While support for a newer version of NFS is not a problem in and of itself, issues can occur if you use multiple NFS versions.
When you create a new datastore, the New Datastore wizard asks if you want to use NFS 3 or NFS 4.1. However, the NFS version screen also displays the following warning message: "Use only one NFS version to access a given datastore. Consequences of mounting one or more hosts to the same datastore using different versions can cause data corruption."
There are also some vSphere features -- such as Storage DRS, Storage I/O Control, Site Recovery Manager and Virtual Volumes -- that cannot be used with NFS 4.1. Legacy fault-tolerance mechanisms cannot be used with NFS 4.1 either, but the newer fault-tolerant mechanisms available with the vSphere 6 release do work with NFS 4.1.
Security is another issue that must be addressed when making the transition to NFS 4.1. Although NFS 4.1 still supports the AUTH_SYS mechanism, Kerberos is preferred because it is far more secure. If you create a new datastore that uses NFS 4.1, the New Datastore wizard will give you the option to use Kerberos-based authentication. If you choose Kerberos, there are two situations you need to be aware of:
VSphere 6 doesn't surpass expectations
Hana and Hadoop get a boost with release of vSphere 6
Quiz: Updates and features in vSphere 6
Dig Deeper on Storage for virtual environments
Related Q&A from Brien Posey
The reasons for going hyper-converged vary. Often, however, organizations deploy HCI technology to effectively address one or more of the five issues... Continue Reading
Adhering to service-level agreements, keeping up with performance demands and planning for future workloads are just a few of the goals you should ... Continue Reading
Is hyper-convergence a good fit for disaster recovery? More organizations appear to believe so and are increasingly using hyper-converged ... Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.