KVM vs Oracle Linux comparison

KVM stands for Kernel-based Virtual Machine, which is an open-source virtualization technology that is embedded in Linux. KVM allows users to seamlessly transform their Linux system into a hypervisor that, in turn, will enable a host machine to run numerous, isolated virtual environments or virtual machines (VMs).

KVM is part of Linux. Users with Linux 2.6.20 or newer already have KVM. As KVM is already a component of the current Linux code, it automatically improves with every new Linux fix, feature, or upgrade. So KVM users are always current and up to date.

KVM automatically transforms Linux to a type -1 (bare-metal) hypervisor. All hypervisors need operating system components, such as a process scheduler, I/O stack, device drivers, memory manager, and more, to run a VM. KVM already has these components embedded, as it is part of the Linux kernel. Each VM is generated as a basic Linux proces,s which is maintained by the standard Linux scheduler, with dedicated hardware such as a graphics adapter, memory, disks, network card, and CPUs.

KVM Key Features:

KVM has many valuable key features. Some of its most useful features include:

• Storage: KVM has the ability to use any storage protocol supported by Linux, including network-attached storage (NAS) and some local disks. Multipath I/O can be utilized to provide redundancy and improve storage. Disk images use thin provisioning, ensuring storage is used on demand. KVM is also able to use shared file systems, enabling VM images to be shared on multiple hosts.
  
• Hardware: KVM is able to use a vast number of Linux-certified supported hardware platforms. As hardware vendors routinely contribute to kernel improvement, the most up-to-date hardware features are generally quickly added to the Linux kernel.
  
• Memory: KVM effectively utilizes the memory management features of Linux, such as kernel same-page emerging and non-uniform memory access. The memory of a VM can easily be switched, supported by large volumes for improved performance, then backed by a disk file or shared.
  
• Migration: KVM actively supports live migration so users have the ability to move any running VM between physical hosts with no downtime.
  
• Security: KVM uses a blend of secure virtualization (SVirt) and security-enhanced Linux (SELinux) for improved VM security and isolation. SELinux determines security boundaries surrounding VMs. sVirt expands SELinux’s processes, permitting Mandatory Access Control (MAC) security to be used for guest VMs and preventing any manual labeling issues.

Reviews from Real Users

“The most helpful aspect of KVM is the fact that the interface is so minimal. It includes just what you need to set up the VMs and manage them, and it's very simple to do so. KVM, as a native virtualization solution, is a complete and fully adequate system for small businesses that need to reduce costs, and also to make maintenance easier. “ - Georges E., Business Engineer and Consultant at All-Tech

“The most valuable feature of KVM is the hypervisor environment and how we can configure it with ease. Additionally, the interface is intuitive.” Sonu S., Senior Solution Architect at Micro Focus

Oracle Linux is a stable, reliable, and scalable operating system primarily used for deploying and running Oracle databases. It is also suitable for various other functions, including managing operating systems and web servers, supporting traffic surveillance, and identity management. 

Oracle Linux is highly valued for its stability, reliability, scalability, good technical support, and ease of use. It has helped organizations to achieve faster DNS queries, stable development environments, reduced vulnerability issues, good performance for Oracle applications, and improved ability to run test scenarios and parallel queries across massive databases.

Oracle Linux Features

Oracle Linux has many valuable key features. Some of the most useful ones include:

• The software is 100% free (no cost) to use, distribute, and update

• Ksplice allows for zero-downtime kernel and user-space upgrades

• DTrace provides comprehensive kernel and application tracing

• For Oracle Linux Support clients, Linux management and high availability are available at no additional cost

• It's Oracle-optimized and works well with Oracle Database and Oracle Applications
  
• New workload optimizations:
  
  • Enhanced memory performance by attempting to better locate a process near its memory and better placement of tasks that do not fit on a single NUMA node
    
  • SPECjbb's performance has been improved by up to 3.6 times thanks to optimizations that help reduce lock contention.
    
  • With bcache, it's simple to employ SSDs as a block cache for slower block devices. A new, scaled block layer subsystem supports many millions of IOps on NVM-Express and high-end PCI-E devices.
    
• Oracle Linux has three deployment options:

• Linux in the cloud: Oracle Linux Premier Support is included in all Oracle Cloud Infrastructure subscriptions at no additional cost.
  
• Linux on premises: This is the industry's most comprehensive and open Linux distribution.
  
• Embedded Linux design: Embedding a feature-rich Linux distribution is an optimized, cost-effective solution for your business.

 Oracle Linux Benefits

There are many benefits to implementing Oracle Linux. Some of the biggest advantages the solution offers include:

• Save money by only paying for support for the systems you need
  
• Improve security by applying patches faster and spending less time troubleshooting and updating
  
• Improve Oracle software and hardware performance

Reviews from Real Users

Oracle Linux stands out among its competitors for a number of reasons. Two major ones are its stability and scalability. PeerSpot users take note of the advantages of these features in their reviews: 

One PeerSpot reviewer, an IT Manager, reports, “I find the virtualization the most valuable.” He adds, “Oracle Linux is the best Linux operating system that I have ever known. It is very stable and strong.”

An Enterprise Architect at a financial services firm writes of the solution, “You also don't have memory issues, especially when it is engineered with platforms like Exadata and Oracle Cluster. These give you the most throughput and performance.” He adds, “It is very scalable, especially on platforms like Oracle Cluster and Exadata.”