Journey to sustainability with IBM LinuxONE Everything you need to get started quickly. Get started
Sustainability in business refers to an organization's strategy for reducing the negative environmental impact of their operations, typically as part of environmental, social, and governance (ESG) goals. Sustainability has become a business imperative because investors, regulators, customers and employees all expect meaningful action and positive results.

Data centers are energy intensive and will account, by some estimates, for as much as 8% of worldwide electricity use by 2030. This makes them excellent starting points to evaluate IT as part of your ESG goals. IBM provides tools for estimating and measuring the environmental impact of your IT infrastructure.

Replacing existing infrastructure with energy-efficient IBM LinuxONE 4 systems, backed by IBM’s decades-long corporate commitment to environmental leadership, can have a significant and immediate effect on energy consumption.

Consolidating Linux® workloads on 5 IBM LinuxONE Emperor 4 systems instead of running them on compared x86 servers under similar conditions can reduce energy consumption by 75%, space by 50%, and the CO2e footprint by over 850 metric tons annually.1

Related solution Journey to LinuxONE

Understand the experience of working with IBM to buy your customized LinuxONE system.

Big picture 1. Learn about green IT and its sustainability impact. 2. Learn about the sustainability benefits of IBM LinuxONE. 3. Consolidate onto IBM LinuxONE. 4. Estimate your IBM LinuxONE energy use. 5. Report your current IBM LinuxONE energy use. How to get started
By practicing green IT, you reduce the harmful impact of IT, beginning with design and continuing through manufacturing, use and disposal of hardware at end-of-life. Green IT includes reducing energy consumption and carbon emissions as well as the sustainable sourcing of raw materials.

IBM as a sustainability partner

IBM is committed to environmental protection across all of its business activities, from its operations to the design of its products and use of its technology.

IBM's program for the reuse and recycling of end-of-life equipment, managed by IBM Global Asset Recovery Services (GARS), has a goal of less than 3% by weight being sent to landfills or incinerated. In 2023, the number was 0.7%.

IBM and the environment Product reuse, recycling, and disposal

IBM LinuxONE is designed for sustainable computing. It is uniquely architected to handle the multi-workload needs of a modern scalable digital business with the highest qualities of service and efficiency, allowing you to grow your workloads with a minimal increase in energy usage.

The ability to run more applications in one environment without impacting performance, throughput, or availability can reduce your IT infrastructure's floor space, cooling requirements, and power consumption. And a 19-inch frame form factor means IBM LinuxONE fit easily into modern data center cooling containment systems for hot aisle/cold aisle configurations.

Sustainability on IBM LinuxONE 4
A history of improving energy efficiency

Energy efficiency has been a hallmark of IBM LinuxONE since the beginning. With each generation, IBM LinuxONE systems became more efficient as capacity grew. Capacity per kilowatt has more than doubled since the first generation.

102% increase in capacity per kilowatt

Consolidating Linux workloads onto IBM LinuxONE can not only reduce IT costs, especially when the software licensing costs are priced per core, it can reduce physical space and power consumption. IBM provides several options for quickly estimating the environmental impact of an IBM LinuxONE system.

TCO and CO2e calculator

The TCO and CO2e calculator helps you estimate the total cost of ownership and emissions of an IBM LinuxONE system and see a comparison to x86. Answer just a few questions about hardware, workload type and software.

Try the LinuxONE and Linux on Z TCO and CO2e calculator
Power and weight estimation

The Power Estimation Tool helps you estimate the power consumption and weight of a specific IBM LinuxONE configuration.

  1. Log in to Resource Link. (A link is provided below.)
  2. Scroll to Tools, then click Power and weight estimation.
  3. Click the model you are interested in:
    • IBM LinuxONE Emperor 4 LA1 (multi frame)
    • IBM LinuxONE Rockhopper 4 LA2/AGL (single frame or rack mount)

Try the Power Estimation Tool
Carbon footprint reports

Carbon footprint reports help you understand carbon footprint impact across the product lifecycle. They can help you see how a solution will allow you to progress toward your sustainability goals.

IBM LinuxONE multi frame IBM LinuxONE single frame IBM LinuxONE rack mount IBM LinuxONE 4 Express

An IBM LinuxONE Emperor 4 can have up to 200 configurable cores, and each core can run many servers, meaning you can run thousands of virtual servers on one IBM LinuxONE system.

Choosing applications to migrate to Linux on Z or IBM LinuxONE

You might consider applications or middleware, including database and application servers, that:

  • Are supported by a software vendor on multiple platforms, including Linux on Z or IBM LinuxONE. In this case, migration is relatively simple and there are no support issues.
  • Have per-core pricing
  • Have high availability requirements
  • Have high security requirements
  • Need close proximity to data on IBM Z or IBM LinuxONE, or that are a component of IBM Z or IBM LinuxONE applications. You can boost the performance and speed of your Linux applications by putting them on the same physical server as their data source.
  • Have high I/O or transactional I/O. Because of its design, IBM LinuxONE excels at handling sustained high I/O rates.
  • Have lower sustained CPU peaks and average memory needs. These are ideal workloads for IBM LinuxONE, which been designed to run multiple workloads at a consistently high CPU and memory utilization.
Leveraging workload consolidation for lower IT costs (PDF)
Phases of the consolidation

Expect the consolidation to include these phases:

  1. Planning. Begin by assembling the stakeholders to decide which applications to migrate and how. Your plan will specify the time, risks, and owner for each migration task.
  2. Proof of concept. Conduct a proof of concept to assess compatibility between the x86 and IBM LinuxONE environments, with a special focus on performance.
  3. Education. Ensure the technical staff has the necessary skills to carry out the migration and maintain the new environment.
  4. Building the environment. Prepare the new infrastructure for migration.
  5. Implementation. Perform the migration. Communication between stakeholders is important during this process. 
  6. Post migration. Document maintenance procedures.

For detailed guidance, see the following IBM Redbook.

Practical Migration from x86 to IBM LinuxONE
Redbook cover: Practical migration from x86 to IBM LinuxONE

IBM provides the ability to view energy and environmental data for your IBM LinuxONE system. You can use this data to understand your current energy use and to report progress towards your sustainability goals.

Hardware Management Console Environmental Dashboard

The Hardware Management Console (HMC) Environmental Dashboard for IBM LinuxONE 4 shows power consumption for a selected system and logical partition, for a selected time, with graphical and tabular formats. You can export the data to XLSX for use in reports.

Hardware Management Console Web Services API

You can also access key environmental and power consumption data, including historical data, using the REST-based HMC Web Services API. This allows you to integrate the data into data center infrastructure management (DCIM) systems and other software such as IBM Instana Observability and IBM Envizi. Data includes ambient temperature and humidity, heat load, exhaust temperature, system power consumption, and power on each line cord phase.

HMC Web Services API documentation

Client projects are available for the HMC, including:

  • python-zhmcclient, a client library in pure Python designed to make the HMC Web Services API easily consumable for Python programmers
  • zhmc-prometheus-exporter, a Prometheus exporter intended to make it easy to set up custom metric collections.
Client projects for the HMC
Logo of zhmcclient, client projects for the IBM Z
LPAR-level power reporting

IBM LinuxONE Rockhopper 4 introduces the ability to conduct power reporting by logical partition (LPAR).

IBM zSystems and IBM LinuxONE – Helping You Meet Your Sustainability Commitments
IBM Instana

You can integrate HMC data into IBM Instana with the IBM Z HMC sensor, an optional feature of Instana Observability.

Monitoring IBM Z HMC with Instana Observability
Visualizing sustainability metrics for a workload consolidation

You might use the Sustainability Grafana Dashboard with Grafana to visualize major sustainability metrics of migrating workloads from x86 to IBM LinuxONE.

Sustainability Grafana dashboard
Technical resources Sustainability on IBM LinuxONE 4

Learn how a single IBM LinuxONE Emperor 4 delivers scalability, doing the work of up to 2000 x86 cores

Learn more
Reducing energy consumption with IBM LinuxONE Emperor 4

Learn how IBM LinuxONE Emperor 4 is designed to dramatically reduce energy versus an equivalent x86 infrastructure.

Learn more
IBM zSystems and IBM LinuxONE – Helping You Meet Your Sustainability Commitments

Learn about new capabilities to support power consumption monitoring at the partition level, the HMC Environmental Dashboard and Web Services API, and more.

Learn more. (Search by title.)
Practical Migration from x86 to IBM LinuxONE

View a technical planning reference for IT organizations that are considering a migration from their x86 distributed servers to IBM LinuxONE

Read the IBM Redbook
IBM LinuxONE and Linux on Z TCO and CO2e Calculator

Answer a few questions to get a personalized total cost of ownership estimate for IBM® LinuxONE and Linux on Z.

Try the calculator
IBM LinuxONE documentation

Documentation for each IBM LinuxONE model.

Explore the documentation
Sustainability Grafana Dashboard

A template for Grafana to visualize major sustainability metrics of migrating workloads from x86 to IBM LinuxONE.

Learn more
Guide for sustainability leaders

Making an impact across three key areas: purpose, roadmap and strategy

Explore the guide
Achieve green IT goals

Minimize energy use and embed responsible computing across your IT environment

Learn more
IBM and the environment

IBM's commitment to environmental protection

Learn more
IBM Impact report

IBM's report on progress and performance

Read the report
A guide to GHG emissions accounting and ESG data management

Steps to establishing finance-grade sustainability data and a best-practice approach to calculating GHG emissions for reporting and disclosure

Read the guide
Optimizing for sustainability with IBM LinuxONE Emperor 4

A demonstration of how consolidating on IBM LinuxONE Emperor 4 can help you meet your organization’s sustainability goals

Watch the video (5:15)
IBM Hardware Management Console for zSystems and IBM LinuxONE – Environmental Dashboard

A demonstration of the HMC Environmental Dashboard, including partition-level monitoring

Watch the video (5:20)
IBM Global Asset Recovery Services (IBM GARS)

Learn how IBM GARS helps clients enhance their supply chain sustainability.

New Watch the video (3:14)
Related solutions Journey to LinuxONE

Understand the experience of working with IBM to buy your customized LinuxONE system.

What's new

In the How to get started section, the Estimate benefits of consolidation tab has been updated with new instructions and links for the Power Estimation Tool.

A video introducing IBM Global Asset Recovery Services (GARS) was added to the Green IT tab of the How to get started section and the Videos tab of the Technical resources section. The link to Practical Migration from x86 to LinuxONE, on the Consolidate onto IBM LinuxONE tab of the How to get started section, was updated for a new edition.

A link to an IBM Z Hot Topics article was changed to reflect the move of Hot Topics to IBM Docs.


1 Consolidating Linux workloads on 5 IBM LinuxONE Emperor 4 systems instead of running them on compared x86 servers under similar conditions can reduce energy consumption by 75%, space by 50%, and the CO2e footprint by over 850 metric tons annually. DISCLAIMER: Compared 5 IBM Machine Type 3931 Max 125 model consists of three CPC drawers containing 125 configurable cores (CPs, zIIPs, or IFLs) and two I/O drawers to support both network and external storage versus 192 x86 systems with a total of 10364 cores. IBM Machine Type 3931 power consumption was based on inputs to the IBM Machine Type 3931 IBM Power Estimation Tool for a memo configuration. x86 power consumption was based on March 2022 IDC QPI power values for 7 Cascade Lake and 5 Ice Lake server models, with 32 to 112 cores per server. All compared x86 servers were 2 or 4 socket servers. IBM Z and x86 are running 24x7x365 with production and non-production workloads. Savings assumes a Power Usage Effectiveness (PUE) ratio of 1.57 to calculate additional power for data center cooling. PUE is based on Uptime Institute 2021 Global Data Center Survey ( CO2e and other equivalencies that are based on the EPA GHG calculator ( use U.S. National weighted averages. Results may vary based on client-specific usage and location.