Nutanix, Inc.

Prerna Saxena

Ramashish Gaurav

Abhishek Kumar

Raghu Prasad Rapole

Shaju Abraham

Rabi Shanker

Methods, systems and computer readable medium for fast cluster upgrades. The disclosed techniques can be applied during an upgrade of a multi-node cluster when upgrading cluster software and/or hardware. Techniques applied include pausing a virtual machine (VM) at a first node, then communicating then-current states of the paused VM to a second node that executes a migrated clone of the paused VM. While the migrated cloned VM is running at the second node, changes to states of the cloned VM are tracked. When the upgrade of the first node has completed, then when migrating the cloned VM back to the first node, only the tracked state changes of the cloned VM are sent from the second node to the first node. The tracked state changes are used to update the states of the paused VM at the first node. The updated VM is resumed at the first node.

Situation-aware virtual machine migration

An illustrative embodiment disclosed herein is a host device including a plurality of virtual machines and a controller virtual machine configured to compute a plurality of central processing unit (CPU) usages corresponding to the plurality of virtual machines. The controller virtual machine is further configured to compute a total usage as a sum of the plurality of CPU usages and to flag one or more outlier virtual machines of the plurality of virtual machines responsive to one or more exceeding CPU usages of the one or more outlier virtual machines being greater than a threshold usage. The controller virtual machine is further configured to assign weights to the one or more outlier virtual machines and to select, for virtual machine migration, a first outlier virtual machine of the one or more outlier virtual machines responsive to the total usage being greater than a target usage.

Systems and methods for selecting virtual machines to be migrated

An illustrative embodiment disclosed herein is a cluster including a plurality of host devices. The plurality of host devices include a first host device. The cluster further includes a cluster controller that receives indication of a contention on the first host device. The cluster controller selects a plurality of candidate host devices among the plurality of host devices based on a plurality of host CPU usages of the plurality of candidate host devices. The cluster controller computes a plurality of projected CPU usages of the plurality of candidate host devices. The cluster controller selects a target host device among the plurality of candidate host devices based on the plurality of projected CPU usages of the plurality of candidate host devices.

Systems and methods for selecting a target host for migration of a virtual machine

A system and method include creating a bootable virtual machine (VM) image for a container image. The method includes a controller machine creating a single partition within an output VM disk file where the single partition comprises a master boot record and a partition table, forming a valid file system in a main partition of the output VM disk file, arranging an input set of container image definitions as a list where a base image forms a head of the list and subsequent images follow in the list, sequentially processing the list for each image by adding the input set of container image definitions to the output VM file; and applying a final networking configuration over the output VM file.

Growing community of inventors

Bengaluru, India

Prerna Saxena