KB-1913 VM migration software and Appian

Purpose

The purpose of this article is to provide an understanding of how VM Migration Software, such as VMware VMotion, works and to answer some of the common questions related to using these softwares with Appian.

What is Live Migration?

Live migration refers to the process of moving a running virtual machine or application between different physical machines without disconnecting the client or application. Memory, storage, and network connectivity of the virtual machine are transferred from the original guest machine to the destination. One commonly used software for this is VMware VMotion.

VM Migration Software and Appian

Appian environments should not be hosted with any live VM migration software because their capability has been known to cause inconsistencies between Appian components. This is a requirement while hosting Appian because these tools may cause data corruption, site unavailability or service degradation. VM migration can often create enough of a communications gap between Appian components that they detect a failure has occurred which can cause internal service metadata to be lost and trigger failover mechanisms.

Affected Versions

This article applies to Appian 17.3 and later.

Last Reviewed: April 2019

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