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Hypervisors Vs Bare Metal Servers: a Beginner’s Guide


What is Bare Metal? Features of Bare Metal. What Is A Hypervisor? Features of Hypervisors. Advantages of bare metal. Disadvantages of Bare metal. Advantages of hypervisors. Disadvantages of Hypervisors. – PowerPoint PPT presentation

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Title: Hypervisors Vs Bare Metal Servers: a Beginner’s Guide

Hypervisors Vs Bare Metal Servers a Beginners
  • If you are an IT professional, you probably know
    that choosing the right hosting infrastructure
    can make or break your IT backbone. At one point
    in your career, you will have to make the
    decision whether to use hypervisors or bare metal
  • Both options will get the job done albeit
    differently. Each has its own unique
    characteristics that cater to different needs in
    the market.
  • A good understanding of how both infrastructures
    operate places you and your company at a better
    position to deploy the right strategies as far as
    hosting is concerned. To help you make an
    informed decision, we have put together a guide
    that explains hypervisors and bare metal in
    detail including their features and associated
    pros and cons.

Table of Contents
  • What is Bare Metal
  • Features of Bare Metal.
  • What Is A Hypervisor
  • Features of Hypervisors.
  • Advantages of bare metal.
  • Disadvantages of Bare metal.
  • Advantages of hypervisors.
  • Disadvantages of Hypervisors.

What is Bare Metal?
  • Bare metal refers to a physical server or tenant
    environment ideal for a single person or company.
    With this model, the owner of the metal server is
    virtually the only one with access to the server.
  • Its working principle resembles that of a
    dedicated server where the operating system can
    be installed onto the physical server without the
    need for a hypervisor overhead. On top of its
    exemplary performance, bare metal has the ability
    to support varied operating systems, even
  • Bare metal servers often find use in workloads
    that require a high amount of processing power
    and those that are latency sensitive. For this
    reason, these servers are excellent for projects
    that demand a continuous amount of resources.
    Bare metal servers have impressive speeds
    therefore utilized for workloads that need a fast
  • The actual term, bare metal is primarily used
    to create a distinction between a physically
    dedicated server emanating from a virtualized
    environment and the array of modern cloud hosting
    strategies. Within any given data center, bare
    metal servers are not shared among multiple

Features of Bare Metal
  • Single tenant environment Bare metal servers
    cater to one client and cannot be physically
    shared with other customers. This, of course, can
    change if the clients decided to run a separate
    virtualized environment apart from it resulting
    in the creation of a multi-tenant environment.
  • Security When it comes to security, nothing
    comes close to dedicated single tenant servers.
    Since each server caters to one client, security
    breaches can only be witnessed if there was
  • High processing power Compared to all solutions
    in the market, bare metal servers can handle more
  • Customization capabilities. As the sole owner of
    the server, you can play with all the
    customization options at your disposal. From the
    configuration stage, you can select the
    appropriate component including hardware
    resources, software, panel add-ons and so on. You
    can even throw in a hypervisor into the mix.

What Is A Hypervisor?
  • A hypervisor is an operating system with the
    ability to create virtual machines (VM) inside a
    bare metal infrastructure. With hypervisors, an
    operating system such as Ubuntu, Windows, or
    Debian is directly installed on the server after
    which apps run natively within the OS. When a
    hypervisor and a bare metal server are both
    installed on the OS, the user can play the role
    of a manager and create virtual machines on the
  • The hypervisors purpose is not to run native
    applications but to virtualize workloads into
    isolated virtual machines. This concept allows
    for enhanced reliability and flexibility of
  • Hypervisors are fundamental components in the IT
    backbone because they make it possible for you to
    have a range of virtual machines all functioning
    optimally on one piece of computer hardware.
  • Hypervisors were introduced in the 1960s but it
    wasnt until the introduction of Unix and Linux
    that they surged in popularity. These two
    operating systems heavily utilized hypervisors to
    expand their hardware capabilities, improve
    reliability, control costs, and enhance security.

Features of Hypervisors
  • Uses virtual machines Hypervisors use the
    virtualization technology of dividing bare metal
    servers into private servers (VPs)
  • Horizontal scalability Ideal for situations that
    demand horizontal scalability and pure
    performance such as high-traffic websites and
    cloud software
  • Advanced Virtual Server Security Include more
    features tailored to secure the system and the
    virtual machines. For instance, they have
    software acceptable features that guards against
    unsigned software finding residence in the
    system. They also have integrated firewalls that
    eliminate the need of IP tables and utilize set
    of rules to define every port of access. There
    are enhanced auditing and logging features that
    track every activity in the system in order to
    prevent malicious activities from being erased or
    hidden. Whats more, they also come with Active
    Directory Integration that authenticates users
    who are trying to aces the virtualized servers.
    The only thing that users need to know is the
    fact that all these security features may not
    benefit you that much if you dont deploy and
    configure them according to the recommended or
    proper security guidelines.

Advantages of bare metal
  • As a single tenant server, bare metal resources
    belong to you alone. This means it can only cater
    to one client on the server. However, when one
    server is extremely overloaded with requests,
    system administrators can increase resources by
    adding hardware. A bare metal environment is
    ideal for a wide range of workloads particularly
    those that require access management and granular
    resource with an ability to scale and maintain
    high levels of security.
  • There are several advantages that make bare metal
    one of the most preferred hosting infrastructure
    in the world of information technology. These
    include the following
  • Security and isolation Baremetal servers are
    security-sensitive. Organizations and individuals
    alike can create a physical separation of
    resources. Although security is a complex and
    broad terminology in cloud computing, using a
    bare metal server over other hosting options
    enhances security substantially.

  • More processing power Thanks to the limited
    access offered by bare metal servers, no one can
    tamper with your projects stability meaning your
    server will have higher processing power.
  • Keeps costs predictable Bare metal hosting
    servers can do a number on your wallet but you
    can predict this cost since it is billed on a
    monthly basis. You can also opt for other billing
    options such as hourly or weekly plans but the
    bottom line is that you will know ahead of time
    how much you are expected to pay for using
    hosting servers.
  • Better service By eliminating the noisy
    neighbor syndrome, you get a better quality of
    service. Technically, a client can hold someone
    responsible if something wrong on the system.
  • Flexibility With bare metal, server
    configurations can be quite precise. You can
    combine both hypervisors and bare metal servers
    for enhanced performance.

  • Lower overhead costs Compared to virtualization
    platforms, bare metal servers incur less
    overhead. The reason is that hypervisors utilize
    the servers processing power on a higher scale.
    Less overhead means increased speed and improved
    responsiveness. Bare metal also gives room for
    more hardware customization which further
    enhances speed and responsiveness of the system.
  • An affordable solution for data transfer When it
    comes to outbound data transfer, bare metal is
    always the most cost-effective option on the
    table. You can get several free data transfer
    terabytes on certain dedicated servers which is
    not the case with other virtualized environments.
    However, always keep in mind that these scenarios
    are heavily dependent upon the offers in
    question. Also, theres never any guarantee of

Disadvantages of Bare metal
  • Like all hosting infrastructure options, bare
    metal has a few disadvantages
  • Instance limitations When compared to
    virtualized instances, bare metal servers have
    restrictions regarding the types and sizes of
    instances available.
  • Backup challenges Hypervisors capture snapshots
    of the VMs memory space allowing for ease of
    backup. Bare metal servers dont have this
    feature. Duplicating machine images to be used as
    the backup and can be quite difficult to do.
    Additionally, bare metal doesnt support recovery
    from tape drives unless the tape drives and the
    BMR software are from the same manufacturer.
  • Complexity Bare metal processes can be intensive
    often relying on a third party operating system
    to make configurations.

Advantages of hypervisors
  • What if you dont have the luxury of being a
    single tenant as in a bare metal model? Perhaps
    you handle a dynamic workload and need to utilize
    resources round the clock. Hypervisors, too, have
    quite a huge number of benefits particularly for
    workloads that need to be run and spun for a
    relatively short period of time before turning
    them off.
  • Quick scalability If you need more server space,
    a hypervisor can easily grant you additional
    servers in no time.
  • Ease of backup Virtual machines allow for a
    smooth and seamless backup protection compared to
    traditional applications. The process of securing
    a backup is complicated and time-consuming hence
    can cause serious downtime. With VMs, snapshots
    of data can be captured and saved in record time
    making the process easier and manageable.

  • Improved mobility The VMs structure has been
    designed in a way that it operates independently
    separate from the underlying hardware. This
    enables it to have the ability to roambetween
    local and remote servers that have an abundance
    of resources.
  • Optimization of hardware Hypervisors have the
    ability to optimize hardware to a greater extent.
    It allows virtual machines to run on their own by
    dividing resources into separate entities. In
    addition, with virtualized servers, hypervisors
    make VMs super mobile to a level that the
    underlying hardware is rendered irrelevant.
  • Security Virtual environments are quite secure
    too. Even if the virtual instances havent been
    physically separated, they are technically
    isolated from each other. Sure, they may be on
    the same server but they have no knowledge of
    each other. So yes, the noisy neighbor effect may
    be witnessed but the hypervisors are secure.

Disadvantages of Hypervisors
  • Some of the reasons some people shy away from
    using virtualized environments include the
  • High implementation cost Creating a virtual
    environment requires the purchase of both
    hardware and software. Other times, devices may
    need to be manufactured, developed or purchased
    in order to implement the infrastructure.
  • Availability issues People and organizations who
    utilize virtualization often worry about what
    will happen to their data in the event that their
    assets are unavailable. If this were to happen,
    the organizations might struggle to maintain
    their positions in the industry. Theres also the
    issue of third-party providers making the control
    of data almost impossible.
  • Requires cohesiveness of all links Being the
    sole tenant means you are in full control of your
    operations. With virtualization, you dont have
    such control because there are quite a number of
    links required to work seamlessly to achieve one
    goal. If one of the links is compromised, the
    entire server will not function optimally.

Bottom line
  • When all is said and done, theres no straight
    answer to the question of which hosting
    infrastructure to employ for your organization.
    Every situation is unique. Every project has a
    different set of requirements. Both bare metal
    servers and hypervisors have their pros and cons
    it all boils down to what your organization needs
    at the time.
  • Bare metal servers offer all the performance
    benefits of physical dedicated servers without
    the contract. They cost way less than virtualized
    environments, have better speeds, higher
    processing power and have better flexibility. If
    your business involves collecting vast amounts of
    data over a short period of time, then you
    certainly want to go the beta metal servers way.
  • Hypervisors, on the other hand, are great if you
    are not after the elite performance displayed by
    bare metal servers. If your goal is to utilize
    resources and consolidate infrastructure in one
    computer hardware but still achieve high levels
    of performance, virtualization is definitely the
    best option for you.
  • With virtual environments, you can enjoy a high
    latency, reduced overall costs, mobility and the
    ability to scale up and or down depending on the
    requirements at hand. Still, you can create a
    hybrid solution that ensures you get the best of
    both worlds and ultimately maximize your RIO.

The End
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