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September 12 2010

GNS3 | Graphical Network Simulator

GNS3 is a graphical network simulator that allows simulation of complex networks.

To allow complete simulations, GNS3 is strongly linked with :

* Dynamips, the core program that allows Cisco IOS emulation.
* Dynagen, a text-based front-end for Dynamips.
* Qemu, a generic and open source machine emulator and virtualizer.

GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP, CCIE, JNCIA, JNCIS, JNCIE.

It can also be used to experiment features of Cisco IOS, Juniper JunOS or to check configurations that need to be deployed later on real routers.

This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.
Reposted bysicksinopalodefuego

June 17 2010

April 13 2010

Ian C. Blenke :: Computer Engineer

The process for converting a VMWare VMDK disk image to Xen HVM is rather quite easy. However, there are "gotchas" that you need to consider when doing this conversion.

TechComparison - Linux Virtualization Wiki

This table compares the features and performance of the various virtualization technologies available for Linux. Hopefully this table also explains why many Linux distributions today ship Xen, even though UML,lguest and KVM are upstream.

March 01 2010

Design and Implementation — Sheepdog Project

Sheepdog is a storage system that provides a simple key-value interface to Sheepdog client (qemu block driver) as shown in figure 2-1. Sheepdog is consists of multiple nodes. Right figure in figure 2-1 shows the architecture of a regular cluster file system (SAN file system). Compared with this, Sheepdog does not require a shared storage, and provides key-value interface which is more suitable to implement a scalable system on distributed environment.
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