Hardware and Database requirements for  upgrading to 10.x version.  

What are the recommended  environment configuration for upgrading CA Devtest 8.0.x  to 10.x

DevTest 10.x

DevTest 10.x – Recommended Environment. 
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Windows Server 2012 R2 64bit JVM and up. 
CPU @2.40 GHz 8 Core 
Ram 16 GB or higher 
Disk Space 100GB 
External DB: Oracle/MSSQL/MYSQL/DB2 (supported versions are mentioned in the database link below) 

Doc link for  System Requirements. 
https://docops.ca.com/devtest-solutions/10-2/en/installing/preinstallation/system-requirements#SystemRequirements-DevTestServerRequirements 

Database: 
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https://docops.ca.com/devtest-solutions/10-2/en/installing/preinstallation/system-requirements#SystemRequirements-DatabaseRequirements