The table below shows Nutanix hardware recommendations for Community Edition:
Table 2-1: Hardware Requirements
Central Processing Unit (CPU)
Intel CPUs with VT-x support
Four-core minimum because 2 cores are dedicated to the CVM
16 GB minimum; 32 GB or higher recommended
32 GB or greater recommended for AOS features such as deduplication, compression, or more user VMs
Network interface card (NIC)
Host bus adapter (HBA)
Community Edition supports Advanced Host Controller Interface (AHCI) SATA, or LSI controller with:
Storage Devices (all drives)
Maximum number of SSD/HDD drives per node is four
Storage Devices (cold tier)
500 GB or greater available; Maximum 18 TB (3 x 6 TB HDDs)
Hard disk drive (HDD) or Solid-state drive (SSD) for cold-tier storage
Storage Devices (hot tier flash)
Single 200 GB SSD or greater
Place SSD(s) before HDDs (commonly Bay 0 or Bay 1). The first bay number varies depending on manufacturer labeling; NVMe-based drives are not supported
One 8 GB capacity device per node. It can be an external or internal device
Nutanix has successfully tested and used external USB drives and internal devices such as a SATA DOM. USB 3.0 media recommended
Consider updating the firmware for any hardware you plan to use to the latest version recommended by the hardware vendor
Source: Nutanix. (2020). “Getting Started with Nutanix Community Edition”
If you use a USB flash device as your boot drive, do not remove it while the server is running!
Community Edition supports up to four (4) nodes in a single cluster. Nutanix recommends deploying a three-node cluster to reap the most benefit from the platform. If you deploy a single node cluster, you will not be able to take advantage of Nutanix’s high-availability (HA) features.
It is not possible to extend a one or two node cluster. Moving from a one or two-node cluster requires destroying the existing cluster and all VMs.
Discuss these limitations with the customer before recommending a cluster size.