IBM System z may be far more technically suitable for cloud computing in the near-term. IBM mainframes support a scalable clustering technology called Parallel Sysplex. System z supports an encryption co-processor, key management, and several system level facilities to encrypt data sets. Mainframe growth is being driven by Linux partitions for net new applications. Combine mainframe Linux with Apache, MySQL, and PHP (the LAMP stack) and you’ve got a low cost open platform for development.”]
Source: https://www.csoonline.com/article/2237164/mainframe-cloud-computing-.html