2020 in IT: Current Trends and Threats
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Thanks to the vMotion function, it is possible to migrate individual virtual machines between different physical servers. Storage vMotion, in turn, allows you to move data between disk arrays without having to shut them down.
For more convenient control, the vCloud Director portal is available for VMware vSphere, which allows easy cloud management even for less advanced users. It is also available from a web browser.
As for the Fault Tolerance function, the contents of one virtual machine are mirrored to another machine, which also runs on another server. If one of the servers fails, the smooth running of the cloud is ensured.
For cloud solutions with VMware vSphere virtualisation, data is not stored on server disks, but on external redundant disk arrays. The data is stored separately from the servers, which reduces the risk of loss.
In the vCenter Server administration interface, you can easily find out what updates are currently available and what happens after they have been installed. The functionality thus makes it easier to schedule updates.
Different roles and permissions can be assigned to individual accounts. VMware vSphere also includes a detailed log of all user activity, allowing you to perform thorough security audits.
The VMware vSphere platform consists of two basic parts:
1. Hypervisor ESXi, which performs full virtualisation of physical servers and creates individual virtual machines from them.
2. VMware vCenter manages interconnected servers in the so-called VMware cluster and thus creates individual cloud solutions.
VMware vSphere technology ensures high availability of cloud services. Thanks to the mirroring of the content of individual virtual machines and intelligent data transfer in the event of a server failure, it is possible to guarantee the availability of cloud hosting up to 99.99%. This means that the maximum time of unexpected unavailability of the cloud server is less than 53 minutes per year.
|Full virtualisation||OS Virtualisation|
|Platforms||KVM, Hyper-V, and VMware||LXC|
|Embedded Virtualisation?Embedded Virtualisation facilitates virtualising VPS and thus enables to create other virtual machines inside of it.|
|Kernel Module ?Kernel Module requires some of the more advanced applications and services such as DRBD (Distributed Replicated Storage System, which uses linux platform core).|
The core of the cloud and VPS are virtualised physical servers. However, when it comes to cloud, more advanced technologies are used. These enable data mirroring, working when the server fails, and data storage on an external disk array. Thanks to this, the cloud is a much more secure service with high guaranteed availability, which is also suitable for frequent scaling.