5 Essential Tips for Maximizing Your Experience at Nutanix .NEXT for Bloggers
What is the difference between the Redundancy Factor and Replication Factor? Redundancy factor 3 is a configurable option that allows a Nutanix cluster to withstand the failure of two nodes or drives in different blocks. By default, Nutanix clusters have redundancy factor 2, which means they can tolerate the failure of a single node or drive. The larger the cluster, the more likely it is to experience multiple failures. Redundancy Factor 3 requirements: Min 5 nodes in the cluster. CVM with 32GB RAM configured. For guest VM to tolerate a simultaneous failure of 2 nodes or 2 disks in different blocks, VM data must be stored on a container with replication factor 3. NOTE: Nutanix cluster with FT2 enabled, can host storage containers with RF=2 and RF=3. Redundancy Factor 2 requirements: Min 3 nodes in the cluster. CVM with 24GB RAM configured. Some background to understand Redundancy Factor. Cassandra Key Role: Distributed metadata store Description: Cassandra stores and manag
If you are trying to install any third party software, specially Antivirus packages on Nutanix AHV hosts or Nutanix CVMs please consider the following: As for running antivirus (or any third-party software) on the CVMs and AHV hosts, this is not something that we support or can allow. The CVM should be treated as a network appliance, with access controls put in place to ensure that only authorized access is allowed, and kept up-to-date with the latest CVE patches. Installing any packages on the Nutanix CVMs is unsupported. Moreover, installing packages on the CVMs will void the support. In general, an antivirus being installed on the Nutanix CVM is not recommended as it can have ill effects on performance and cause negative impact on the stability of the system. However you can install antivirus on HYPER-V and VMware hosts, just follow these articles: KB 2360 Antivirus on Nutanix on vmware. KB 5153 Antivirus on Nutanix Hyper-V Nodes. If you like this content, consider clicking the -
Let’s say you want to add a new node with a newer processor class than the existing nodes in the cluster. In this case you must enable EVC (Enhanced vMotion Compatibility) feature. What is EVC? EVC stands for Enhanced vMotion Compatibility which is a vCenter Server cluster-centric feature allowing virtual machines to vMotion or migrate across ESXi hosts equipped with dissimilar processors in the same cluster. VMware EVC Mode works by masking unsupported processor features thus presenting a homogeneous processor front to all the virtual machines in a cluster. This means that a VM can vMotion to any ESXi host in a cluster irrespective of the host’s micro-architecture examples of which include Intel’s Sandy Bridge and Haswell. One caveat to remember is that all the processor(s) must be from a single vendor i.e. either Intel or AMD. You simply cannot mix and match. What are the benefits? The main benefit is that you can add servers with the latest processors to your existing cluste
Let’s say you need to administer your user VMs from the command line interface. The Controller VM resources are shown under the VM page In the Nutanix Prism, but you will not be able to change the resources configuration unless you connected to the Acropolis hypervisor (host) and modified the configurations using virsh. “virsh: is a command line interface tool for managing guests and the hypervisor.” Centos.org. First you can review the settings of the CVM under the VM Page on Prism. Connect to the Acropolis hypervisor (host) using the root account with password “nutanix/4u” Lists all the VMs on a host > virsh list –all Displays information about a VM > virsh dominfo VM_Name Displays information about the vCPU > virsh vcpuinfo VM_Name Sets the number of virtual processors > virsh setvcpus VM_name count Note: The count value cannot exceed the number of processors specified for the guest. You can increase the number of processors by editing the virs
Here is a tip on how to reset the password for Nutanix Prism local user. The guide applies to Nutanix Prism Central as well. There are two ways. 1. Using Prism interface Log in to Prism Element with domain user and go to User Management Prism user management From the user's window choose user and click update. On the bottom of the applet there is a Reset password button. 2. Command line Log in to CVM over SSH and get into ncli command line. Follow the step by step instructions by reading Reset Web Console or nCLI Password Also if you want to know how to modify the Prism user password expire days for security reasons, you can follow this article: Modify Prism admin and console user password expire days.
The Nutanix Support portal includes a compatibility matrix available from the Compatibility Matrix link. You can filter and display compatibility by Nutanix NX model, AOS release, hypervisor, and feature (platform/cluster intermixing). Nutanix recommends that you consult the matrix before installing or upgrading software on your cluster. Do you want to know if you can mix different types of CPUs, memory, disks or hypervisors in your Nutanix environment? Start with this documents that provide the answers you might be looking for, like: Hardware Restrictions: mixing different Nutanix CPU families Storage restrictions: Mixing all-SSD and hybrid SSD/HDD Mixing NVMe and SSD/HDD Encryption restrictions DIMM restrictions: Mixing DIMM Types Mixing different DIMM Capacity Mixing different DIMM Manufactures Mixing different DIMM speed Hypervisor restrictions You can get all the answers in this document : Product Mixing Restrictions In case you need memory specific repla
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