Default untagged VLAN for CVM and AHV host The setup shown here well for situations where the switch administrator can set the CVM and AHV VLAN to untagged. Tagged VLAN for CVM and AHV host If you do not want to send untagged traffic to the AHV host and CVM, or if security policy doesn’t…
What is Flash Mode? Flash Mode is a feature that will guarantee an entire virtual machine (VM) virtual disk or a portion of a VM virtual disk always resides in the hot tier. VM Flash Mode is also referred to as VM/vDisk Pinning Up to 25% of the SSD tier of the entire cluster can be reserved…
After completing the NCP, the NCAP was the next goal on my list. I began to prepare for this in a similar fashion to how I did with the NCP. The first step was of course, to download the Exam Blueprint. As with the NCP guide, a big credit again goes to Steven Poitras, and…
Disk Failure Monitored via SMART data Hades responsible for monitoring VM impact: HA Event: NO Failed I/O: NO Latency: NO In event of failure, Curator scan occurs immediately Scans metadata to find data previously hosted on failed disk Re-replicates (distributes) to nodes throughout cluster All CVM’s participate CVM Failure Failure = I/O’s redirected to other…
The default AHV configuration includes an OVS bridge called br0 and a native Linux bridge called virbr0. The virbr0 Linux bridge carries management and storage communication between the CVM and AHV host. All other storage, host, and VM network traffic flows through the br0 OVS bridge. The AHV host, VMs, and physical interfaces use ports…
Unsegmented Network In the default, unsegmented network in a Nutanix cluster, the Controller VM has two virtual network interfaces—eth0 and eth1. Interface eth0 is connected to the built-in external virtual switch, which is in turn connected to the external network through a bond or NIC team that contains the host’s physical uplinks. Interface eth1 is…
No backplane for internode communication All I/O’s handled by hypervisor on private network I/O is forwarded from hypervisor to CVM CVM replicates with other nodes with external IP over public 10GB network Read requests are served locally Typically, the only traffic on the 10G public is replication Occasionally CVM will forward requests in event CVM…
An Acropolis Slave runs on every CVM with an elected Acropolis Master which is responsible for task scheduling, execution, IPAM, etc. Similar to other components which have a Master, if the Acropolis Master fails, a new one will be elected. The role breakdown for each can be seen below: Acropolis Master Task scheduling & execution…