Oracle虚拟化介绍要点.ppt

Transcript: So PCs are obviously very well known, local applications, local everything, a lot of memory in there, very expensive, fairly expensive. Then you have these so-called thin clients. Theres many thin clients out there that actually run an embedded Windows version, and then theres a lot of memory. And in the next version they say oh, we added a web browser and oh, we added this because they have too much power in the system, and they want to start adding more and more stuff. So you end up with a thin client thats really just a PC where they disabled some user interfaces. So they still use a reasonable amount of power, but they definitely have issues with security and updates because youre updating a lot more than just the firmware. And then you have the Sun Ray. So the Sun Ray, I didnt bring one with me because its been a bit too hectic, but the Sun Ray is this really tiny device, and you can see them in the email pools, they have Sun Rays. And they go from like 4-watt power up to 16-watt power on the all-in-one unit without the display included, so theyre incredibly low power, less than a light bulb in power consumption, literally you can measure it with a kilowatt. And there is no local storage, theres just firmware, and the firmware contains the display engine. So theres no local applications running, theres nothing you download and install, you plug the thing into the network and its done. The upgrades are all done automatically through the server. By default it does DHCP, it finds a default host name Sun Ray servers on your local domain, it will connect to the server and go on. If you want to configure it, you can. On the server side you say these are the firmware servers, you connect to these or the servers you connect to for this session, and thats it. Its incredibly secure, so the government loves this stuff because in particular like in the military if youre in the battleground, these things get lost. There is no stage locally, theres no caching of