Feature spotlights

Deploy with agility

Integrate public, private and hybrid cloud deployments with agility and security. IBM z15™ enables you to develop, manage and transform your core business apps. Cloud native development makes it easy to host container-based applications for hybrid and private cloud workloads, and z/OS® Container Extensions lets you run Linux on Z apps right on z/OS for the first time.

Get ultimate uptime

Exceed customer and user expectations for system, application and data availability. IBM Z® delivers the highest reliability levels and is designed to deliver 99.999% or greater availability. Now, Instant Recovery offers even more continuous availability by reducing downtime and impact. For your planned downtime, significantly speed up your system recovery time so you can meet your Service Level Agreements.

Gain flexibility in the cloud data center

IBM z15 is available in one to four standardized 19” frames and can seamlessly coexist with other platforms in the data center. The z15 single frame system requires 75 percent less floor space than x86 servers and less than half the floor space of IBM z14®.

Ensure data privacy with encryption everywhere

Protect against insider and external threats. IBM z15 enables you to encrypt all your data, isolate workloads and authenticate access. IBM Data Privacy Passports helps protect data after it leaves the system, minimizing the impact of breaches and noncompliance. IBM z15 with z/OS V2.4 enables redaction of sensitive data from diagnostic files, to protect against data exposure and noncompliance.

Scale for business growth

Transform your business processes, create new services and extract maximum value from your data; one z15 system can execute up to 1 trillion secure web transactions per day. IBM z15 delivers high performance with up to 190 configurable cores and up to 40 TB memory. Scale for growth with up to 2.4 million containers on a single system.

Reach new heights with AI and blockchain

Exploit innovative technologies such as blockchain and artificial intelligence. Colocated analytics and customer data slash time to insight and action. IBM z15 combined with the IBM Blockchain Platform delivers a secure, enterprise blockchain solution.

Upgrading? Use the tool to compare IBM Z systems.

Read the documentation

Customer case studies

Hear how this bank uses the resiliency of IBM Z to handle 1.5 billion monthly transactions.


See how this service provider gains data security and peace of mind for retail banking customers.


Technical details

Software requirements

Supported operating systems:

  • z/OS® V2.4, 2.3, 2.2
  • Linux on Z (our partners are Red Hat, Canonical and SUSE)
  • z/VM® 7.2, 7.1 ,6.4
  • z/VSE® V6.2
  • z/TPF 1.1
  • KVM hypervisor for IBM Z (offered by Linux distribution partners)

Hardware requirements

Specifications will vary by model and configuration.

  • See the Redbook for details and requirements.

Technical specifications

IBM z15 offers unique system capabilities:

  • Security: Secure Execution for Linux, CPACF, Crypto Express7S, Smartcards
  • Instant Recovery: IBM System Recovery Boost
  • Specialty engines: IFL, zIIP, Internal Coupling Facility, SAP (for I/O)
  • Flash: Virtual Flash Memory
  • I/O: FICON Express, zHyperLink Express, RoCE Express and OSA-Express
See a complete list of technical specifications

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