Repurposing Consumer Smartphones for Data Centers: A Sustainable Approach
Redeploying unmodified consumer smartphones into a data center environment would be dangerous and inefficient. The computing elements of smartphones are wrapped in components that are not needed in the server context: display, battery, chassis, and peripheral hardware like cameras. In addition to taking up valuable space, some components, such as batteries, contain materials not suitable for a data center environment.
Preparing Smartphones for Data Center Use
Before deployment, smartphones must be processed to remove everything except the motherboard, which contains basic compute functionality. Note that the motherboard is responsible for the largest fraction of embodied carbon (around 50% based on internal carbon footprint assessments), so this effort targets the most impactful components.
Adapting the Operating System for Performance
The Android operating system (OS) is already based on Linux, but the mobile-oriented Android userland needs to be replaced by a general-purpose Linux distribution. Updating the operating system not only achieves programmability; It also disables many protections that are important for consumer devices, but unnecessary for cloud computing. For example, phones have a “Low Memory Killer” daemon, which limits memory-intensive applications.
Orchestrating Tasks with Containerization
The challenge of orchestrating tasks across the large number of devices needed to achieve the performance of a traditional server (SPEC benchmarking results indicate that 25-50 phones are equivalent to a modern server) is addressed through the use of containerized applications managed by Kubernetes. Phones are organized into self-managed clusters of 25 to 50 devices.
By creatively repurposing old smartphones, data centers can explore innovative pathways to sustainability. This approach not only addresses e-waste concerns but also leverages existing technology to reduce the carbon footprint, making it a win-win for both technology and environmental conservation. For more information on this initiative, you can visit the original research article Here.
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