Monday Jan 19, 2009

access a virtualbox guest through the network

[A quick update - in V2.2.x, we can use "Bridge" option in the network setting to access the VM from outside world, which is familiar to VMWare users. May 31]


On virtualbox, the default network setting of the VM is NAT. It's certainly the easiest way to get the network up and work - you don't need to touch anything, just use the default setting. But you need to do some extra configuration when you want to access services running on the guest(VM), which is not that straightforward and convenient. You may refer to the manual about how to set up "port forwarding". It's basically to ask the host to listen on a user defined port and forward incoming requests to the default service port on the guest.

You may find "host interface networking" setting is more convenient. In this case, the guest will be assigned an IP address in the same subnet of the host. You can access the gust's services just like visit an ordinary host on the network. You may even redirect the guest's display to other machines if you like. Besides, you also get superior network performance comparing to NAT.

Wednesday Oct 15, 2008

Sun and BJ Olympic Games

A couple of days ago, I learned some
interesting stuffs when I was chatting with a colleague. It’s about Sun’s
technologies and products applied in the impressive Beijing Olympic Game.


Most of
us who work for Sun may know that Sun provided the technology platform to NBC’s universal Olympic website. This is not new to
us. (BTW, Sun’s Intel Xeon based X64 servers delivered superior performance
while providing energy and space efficiencies). And it’s also not new that the
Facebook’s Online Olympic Games Application was developed using Sun’s new
browser-based social application development environment, Zembly.
The fun part of the chat is what Sun’s tech/products were been used in
Beijing during the
game.


I don’t
know why Sun doesn’t spread the words about it’s role in this Olympic Game(this
reminds me, maybe I should be careful about what I say here - they might be
business secrets, or even national secrets…:-)
), anyway, here’s the “unofficial” information, take it “at your own
risk”. Here you go. Sun provided consulting services to the Games Systems. the
services included system architecture design, implementation and supporting services
during the game. As you can guess, the systems used quite a lot Sun’s products.
Here’s an incomplete list: Solaris 10, Sun Cluster, Directory Server, Web
Server, QFS and of course servers(both SPARC and X64) & storage. It’s said
that the team worked like a dog during this hot summer. Before the game, they
spent a lot of efforts to test and tune the system. They tried to break the
system with huge workload and erroneous inputs…etc. The team also provided
HW&SW support during the game. They were monitoring the systems and reacting
to any emergency. Besides the difficulties of the project itself, the team also
suffered a lot by the awful communication experience:-)
, don’t get me wrong, I mean because of the language and the
cultural differences.


Okay, what
else…yeah, one thing I remembered clearly is the comments about JES
directory server. As expected, the directory server performed very well under a
heavy workload. It was used to provide authentication service.


There’re
a lot of other products from other companies were used in the system along with
Sun products. Oracle DB, for example, was running on Sun Sparc servers(I guess
so). Windows Server OS was used heavily in the system mostly on Lenovo PC
servers. I just wonder how many of them were running on Sun’s X64 servers.


Hope to
see more Sun products in
London…I really hope.

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Jie Shen

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