Vinchin Backup & Recovery | VM Backup, VM Migration and DR

Consistent Backup vs Inconsistent Backup, which is right for your critical data?

When talking of data protection, backup would most likely be the first thing that comes to our mind. It’s a concept that couldn’t be more familiar for us, especially today’s IT infrastructure owners, but once when we try to dig deep into the topic of backup consistency, things may start to get more confusing.

Advantages of data deduplication

Data deduplication is also known as the capacity optimization protection technology. Currently, data deduplication is mainly used for data backup, and some companies have announced plans to use it in primary storage, but that's not the mainstream. Data deduplication can provide larger backup capacity, achieve data retention for a longer time, and also achieve continuous verification of backup data, improve the level of data recovery service, and facilitate the realization of data disaster recovery.

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The differences between KVM and Xen

Xen has a longer history than KVM. Xen has specific support for UNIX, Linux and Microsoft Windows, including chipsets, such as arm of X86, IA64 and AMD, Fujitsu, IBM and sun, as well as x86 / 64 CPU merchants and Intel embedded support. Performance: compared with KVM, Xen has better processing performance, but it is slightly inferior to KVM in disk I / O. cloud manufacturers have switched their virtualization technology from Xen to KVM, and the development trend of KVM in the future can not be underestimated.

Comparison between openstack and ovirt

The purpose of ovirt is to provide a set of KVM virtualization management software in line with market norms, and develop and utilize the characteristics of KVM as much as possible. Relatively speaking, as the IAAs project of red hat, openstack is much more famous than ovirt, and their functions also have overlapping parts. Therefore, many people have questions: will red hat retain open stack and abandon ovirt because of the duplication of their functions. The answer is No.

Install XenServer virtual machine systems using ISO

To start installing the operating system in the VM, although XenServer already contains multiple templates, such as RedHat as 4 + 5, CentOS, SUSE, Oracle Enterprise Linux, etc., there is no need to download the original installation CD during installation; If it is not in the list, such as RedHat as 3, it must be installed on CD. Here is how to install the required operating system in the form of an ISO file when adding a VM.

About the storage type of XenServer: SR, VDI & VBD

Sometimes we may fail to add a virtual disk on a XenServer VM since every VM has the following general limitation on virtual devices. Although we can’t achieve the goal directly through XenCenter, XenServer yet supports users to add vdisk with CLI command lines. Before doing so, let’s first learn something about SR, VDI, and VBD, the three storage types of XenServer.

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