# What Version of EAM to Use for a Cluster of Mixed 7.9 and 8.1 Gateways?

**URL:** <https://forum.inductiveautomation.com/t/what-version-of-eam-to-use-for-a-cluster-of-mixed-7-9-and-8-1-gateways/63581>\
**Category:** Ignition\
**Created:** [August 29, 2022, 8:26pm UTC](https://forum.inductiveautomation.com/t/what-version-of-eam-to-use-for-a-cluster-of-mixed-7-9-and-8-1-gateways/63581 "2022-08-29T20:26:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ralacosta](https://avatars.discourse-cdn.com/v4/letter/r/f0a364/32.png) [@ralacosta](https://forum.inductiveautomation.com/u/ralacosta)\
**Post date:** [August 29, 2022, 8:26pm UTC](https://forum.inductiveautomation.com/t/what-version-of-eam-to-use-for-a-cluster-of-mixed-7-9-and-8-1-gateways/63581/1 "2022-08-29T20:26:03Z")

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We have a cluster of servers right now currently consisting of 7.9 and 8.1 servers. Currently our EAM is running using 7.9.16, but I was wondering if an 8.1 EAM would be better suited for this mixed inventory.

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**Author:** ![apalas](https://avatars.discourse-cdn.com/v4/letter/a/e47774/32.png) [@apalas](https://forum.inductiveautomation.com/u/apalas)\
**Post date:** [August 31, 2022, 7:35pm UTC](https://forum.inductiveautomation.com/t/what-version-of-eam-to-use-for-a-cluster-of-mixed-7-9-and-8-1-gateways/63581/2 "2022-08-31T19:35:39Z")

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Hi,

If the controller itself is a different major version that some of it’s agents, you might run into problems executing some agent tasks (transferring tags, projects, etc) since a lot of resources will be defined differently. Ideally, the EAM controller is the most up-to-date compared to everything else.