We are using Sitecore 8.1 Upd 3. However, as this version has been discontinued at the end of 2018, I started considering upgrading to the latest Sitecore 9.1.

Referring to Sitecore's compatibility table, in 8.1 and 9.1, in all of OS / SQL / Mongo / Solr, I found that a different version is required.

In addition, the site we operate is on the virtual server on IaaS, and it is not easy for users to upgrade the OS, I can not assume it.

Our environment is follows

Sitecore 8.1 Update 3
OS Windows Server 2012 R2
SQL SQL Server 2012
Mongo 3.0
Solr 4.1

A question

Is it possible to upgrade Sitecore from 8.1 to 9.1 without upgrading the OS (Windows)?

Is it possible to run Sitecore 8.1 with OS / SQL / Mongo / Solr version adapted to the requirements of 9.1?

I hope you will receive wisdom.

closed as off-topic by Mark Cassidy Jan 11 at 10:20

  • This question does not appear to be about Sitecore CMS and multichannel marketing software, within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • I'm voting to close this question as off-topic because multiple questions, too broad, non-specific. – Mark Cassidy Jan 11 at 10:20

I'm not sure about running Sitecore 9.1 on Windows Server 2012 R2 (I suspect you can't), but it is certainly possible to run Sitecore 8.1 with the requirements for Sitecore 9.1. So you could set up a new environment with the requirements for SC91 and run the SC81 site on it before upgrading.

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