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What is Lguest?

Lguest allows for the simultaneous operation of multiple instances of a 32-bit kernel, and you can start it by executing the command modprobe lg followed by Documentation/lguest/lguest to create a new guest. I highly recommend trying it out because lguest is incredibly easy to set up and use. Its advantages are noteworthy: I can boot kernels for testing in under a second, which is about ten times faster than qemu and a hundred times quicker than traditional boot methods. Furthermore, by utilizing a pty for console access, you can perform operations like piping outputs through grep. Lguest includes a full kernel patch, featuring the launcher, and is compatible with versions 2.6.23-git13 and newer. The main purpose of lguest is to maintain the isolation of guests, preventing them from directly accessing the host system, except via virtual devices provided by the host, even in cases where the guest may pose a security threat. However, a potentially dangerous guest kernel can still pin host memory, but this is restricted to the amount allocated for the guest itself. While many images are set up to create virtual consoles such as (/dev/tty0, etc.), lguest designates its console as /dev/hvc0, which enhances its functionality. This unique console setup, along with its rapid boot times, makes lguest an invaluable resource for developers looking to efficiently test kernel modifications without the complexities associated with full virtualization environments. Thus, lguest stands out as both a practical tool for quick testing and a means to ensure the integrity of the host system.

What is IBM z/VM?

IBM z/VM stands out as an advanced operating system that incorporates a hypervisor and virtualization capabilities, tailored to proficiently oversee guest servers, including Linux, z/OS, and z/TPF virtual machines, alongside Red Hat OpenShift on IBM Z and LinuxONE platforms. This powerful system has the capacity to run hundreds or even thousands of guest servers on a single IBM Z or LinuxONE server, showcasing exceptional efficiency and flexibility. It supports a diverse array of machine images and architectures, simplifying the migration process, facilitating application transitions, and enabling the consolidation of multiple systems into a single server environment. By optimizing resource sharing among virtual machines, IBM z/VM delivers remarkable scalability, security, and operational efficiency, ultimately leading to substantial cost savings while laying a strong groundwork for cognitive computing initiatives. Its deployment facilitates on-premises cloud computing within a hybrid cloud model, empowering organizations to effectively scale and manage extensive Linux and container workloads. Additionally, it plays a vital role in ensuring continuous availability through IBM's comprehensive resiliency solutions, which guarantee uninterrupted infrastructure for businesses. The adaptability and efficiency of IBM z/VM render it an indispensable resource for contemporary enterprises striving to enhance their IT operations and achieve greater operational agility. As the demand for robust computing solutions grows, IBM z/VM's role in the marketplace becomes increasingly critical.

Media

Media

Integrations Supported

IBM LinuxONE
IBM Z
IBM Z Multi-Factor Authentication
Red Hat OpenShift
SDS IronSphere
Tape Encryption
Trusted Access Manager for Z
V:M Secure for z/VM

Integrations Supported

IBM LinuxONE
IBM Z
IBM Z Multi-Factor Authentication
Red Hat OpenShift
SDS IronSphere
Tape Encryption
Trusted Access Manager for Z
V:M Secure for z/VM

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Lguest

Company Location

Australia

Company Website

lguest.ozlabs.org

Company Facts

Organization Name

IBM

Date Founded

1911

Company Location

United States

Company Website

www.ibm.com/products/zvm

Categories and Features

Categories and Features

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