VPS Hosting Blog

OS Virtualization , Parallel Virtuozzo Containers and VZFS .

Virtualization , Parallel Virtuozzo Containers and VZFS .

OS Virtualization : It means Virtualization at OS or Kernel Level. This creates isolated containers on a single physical server and OS instance to utilize hardware, software, datacenter and management efforts with maximum efficiency.

In short we can say that it creates a separate runtime environments all within the same overall OS.

What is Parallel Virtuozzo Containers?

Parallels Virtuozzo Containers is a patented OS virtualization solution. Virtuozzo Containers 4.0 creates isolated partitions or Containers on a single physical server and OS instance to utilize hardware, software, data center and management effort with maximum efficiency.

Parallel Containers runs the same OS kernel as the host system (Linux / Windows ,etc.). This single-kernel implementation technology allows to run Containers with a almost zero overhead. Thus, Virtuozzo Containers offer higher efficiency and manageability than traditional virtualization technologies.

Lets See the File system of this technology.

Virtuozzo File System (VZFS):

VZFS is a file system that shares common files among multiple Containers with flexibility. It is allows users to modify, update, replace, and delete shared files. When a user modifies a shared file, VZFS creates a private copy of the file transparently for the user. Thus, the modifications do not affect the other users of the file.

Benefits of VZFS are as following:

• It saves memory required for executables and libraries.
• Sharing memory improves scalability and total system performance.
• Disk quota enables the administrator to limit disk resources available to a Container on-the-fly, in the same manner as the standard disk quota system works on a per-user basis. Disk quota for users and groups inside Containers is also supported.
• It saves disk space. A typical Linux server installation occupies several hundred MBytes of disk space. Sharing the files allows you to save up to 90% of disk space;
• VZFS does not require having different physical partitions for different Containers or creating a special “file system in a file” setup for a Container. This significantly simplifies disk administration

Bookmark Me

What is Virtuozzo Technology?

What is Virtuozzo Technology?

Virtuozzo is a software application for enterprise server virtualization that allows an administrator to create virtual environments on a host computer at the operating system (OS) layer.

Virtuozzo includes Kernel Service Abstraction Layer (KSAL) that manages access to the kernel.It prevents from entire server being down because of a single VPS.

Shortly speaking Virtuozzo is an automated software used for virtualisation.

Some of its main features:

1)Dynamic Real time Partitioning: Virtuozzo enables us to partition a single physical server into multiple (up to 100) VPS (Virtual Private Server) with functionality like a dedicated server.

2) Virtualization : By using virtuozzo you can easily migrate your VPS without any downtime.

3)Resource Management : It provides us the ability to control,account , monitor, report and manage CPU, Memory, Disk, Network I/O and multiple other System Resources based on pre-regulated barriers, limitations, guarantees or shares for every single VPS Hosting.

4) Mass Management : Multiple of VPS’s on a node can be managed easily as a single server as well as many physical servers can be managed

centrally through the VZMC (Virtuozzo Management Console).

Lets see Architecture for Virtuozzo:

Virtuozzo’s architecture eliminates system calls between layers, which reduces CPU usage overhead dramatically.

Virtuozzo’s architecture eliminates system calls between layers, which reduces CPU usage overhead dramatically.

Sharing of libraries  makes it possible for administrators to put thousands of VPSs on the same machine.

Bookmark Me