{"id":7031,"date":"2021-06-22T07:24:57","date_gmt":"2021-06-22T05:24:57","guid":{"rendered":"https:\/\/tekmart.co.za\/t-blog\/?p=7031"},"modified":"2021-06-22T07:24:59","modified_gmt":"2021-06-22T05:24:59","slug":"bare-metal-cloud-a-tech-explanation","status":"publish","type":"post","link":"https:\/\/tekmart.co.za\/t-blog\/bare-metal-cloud-a-tech-explanation\/","title":{"rendered":"Bare-metal cloud- a tech explanation"},"content":{"rendered":"Reading Time-approximately:<\/span> 5<\/span> minutes<\/span><\/span>\n

Bare-metal cloud is a public cloud service where the customer rents dedicated hardware resources from a remote service provider. It offers the hardware resources without any installed operating systems or virtualization infrastructure.<\/strong><\/h2>\n\n\n\n

By Kurt Marko<\/a> and Erin Sullivan<\/a><\/p>\n\n\n\n

Commercial cloud service infrastructure enables the virtualization and subdivision of compute, storage and database resources so that servers and storage arrays can be carved up and shared by multiple customers. <\/p>\n\n\n\n

But while virtualized compute instances provide flexibility and cost benefits, there are drawbacks, particularly related to resource contention — the so-called\u00a0noisy neighbor\u00a0problem. <\/p><\/blockquote><\/figure>\n\n\n\n

There are also risks from incomplete isolation of execution environments and virtual networks. Bare-metal cloud solves these issues, allocating isolated physical resources to customers.<\/p>\n\n\n\n

The bare-metal-cloud is a good option for\u00a0big data\u00a0applications and high-transaction workloads that do not deal well with\u00a0latency. Most of the largest cloud vendors, such as AWS, IBM, Oracle and Rackspace, offer bare-metal cloud services.<\/p>\n\n\n\n

How do bare-metal clouds work?<\/strong><\/h3>\n\n\n\n

Bare-metal services are cloud offerings that are comparable to renting a raw, dedicated server from a managed service provider (MSP). Like traditional dedicated servers, bare-metal instances are not preinstalled with a hypervisor and provide raw access to the system hardware. Unlike traditional dedicated servers, some bare-metal instances are available on demand and billed by a specific time period.<\/p>\n\n\n\n

Large cloud providers, such as AWS, may offer additional hardware to enhance conventional servers and improve their integration with virtual private cloud networks,\u00a0cloud management systems\u00a0and other cloud services. For instance, AWS bare-metal instances are actually pseudo-bare-metal machines; they include a lightweight Nitro hypervisor that manages memory and CPU allocation. (AWS claims the hypervisor overhead is negligible and server performance is indistinguishable from bare metal for most workloads.) Similarly, Oracle Cloud Infrastructure bare-metal servers operate within a virtual cloud network and use a custom\u00a0SmartNIC\u00a0to isolate and virtualize the network.<\/p>\n\n\n\n

Like dedicated servers, bare-metal clouds don’t share system resources with other users. They also don’t have added overhead from\u00a0nested virtualization\u00a0when a user adds a separate virtualization layer; for example, when containers are run within a lightweight virtual machine (VM). Bare-metal servers are ideal for applications that require access to the physical server hardware and performance counters or that are licensed and supported for virtualized environments.<\/p>\n\n\n\n

Bare-metal servers are accessed via the cloud service’s management interfaces, which might be a browser interface,\u00a0command-line interface\u00a0or\u00a0REST API. Some services might also enable\u00a0Secure Shell\u00a0access over a customer’s virtual private cloud to the serial console for systems that have already have a running operating system. OS installs are accomplished using the\u00a0Unified Extensible Firmware Interface\u00a0or the\u00a0Preboot Execution Environment\u00a0secure network boot of an installation image.<\/p>\n\n\n\n

Benefits and drawbacks of bare-metal cloud<\/strong><\/h3>\n\n\n\n

There are both benefits and drawbacks related to a bare-metal cloud environment. It’s important to examine them carefully before deploying one.<\/p>\n\n\n\n

Benefits<\/strong><\/h4>\n\n\n\n
  • Predictability.<\/strong>\u00a0One benefit of bare-metal cloud infrastructure is the performance predictability of dedicated resources.<\/li>
  • Security.<\/strong>\u00a0Dedicated resources also provide customers with control of system and network security.<\/li>
  • Flexibility.\u00a0<\/strong>Businesses can customize a bare-metal cloud to meet their OS and software stack requirements and troubleshoot applications without having to worry about neighboring VMs.<\/li>
  • No resource contention.<\/strong>\u00a0Public cloud environments are\u00a0multi-tenant\u00a0and VMs share physical servers, which can result in VMs contending for resources. The dedicated servers that make up a bare-metal cloud avoid resource contention.<\/li>
  • Scalable.<\/strong>\u00a0Thus, most bare-metal services are highly scalable, including systems with more than 20 sockets, hundreds of CPU cores and terabytes of memory. That makes them good options for big data applications and high-transaction workloads that need low latency.<\/li>
  • Direct access to system hardware.<\/strong>\u00a0Bare metal allows applications requiring access to system performance counters to run in a cloud environment.<\/li>
  • Financing flexibility.<\/strong>\u00a0Storage and other hardware resources are provisioned as needed and typically billed based on a specific time period — per hour, day or month, eliminating the need to tie up Capex budget. This approach is particularly valuable for workloads where hardware requirements are unclear and likely to change.<\/li>
  • Access to high-end hardware.<\/strong>\u00a0Customers get this access sometimes before it is available in enterprise systems.<\/li>
  • Cloud migration advantages.<\/strong>\u00a0Bare metal enables the use of cloud migration software not supported on a VM or with restrictive, hardware-based licensing.<\/li><\/ul>\n\n\n\n
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