Edit: Document everything about it you can - next poor bloke to get that mess will appreciate it. This is also for the guy who documented his work that I benefited from - whoever you were, thank you!
This will image an NT machine. Hmm, I think the issue you will run into is how the machine interfaces with the water jet. How does it hook up to the computer?
Via a serial port? Agile Networking Solutions is an IT service provider. Will drivesnapshot output the image into a format that can be translated into a virtual machine? I already have the cloned hard disk from this machine, So i have a backup. I am more concerned with finding a solution to this that makes me no longer hardware dependent on this archaic hardware. I don't think drivesnapshot will output an image to use natively but should load to any blank VM.
It does interface with the water jet using a serial connection. First I want to see if a P2V is even possible. I don't think it should be an issue as long as the water jet serial cable is physically connected to either the ESXi server that the VM is going to be hosted on, or the desktop that is running the VMware Workstation on it. That's a good idea Matt, I think I will try the "drivesnapshot" application and see if that goes smoothly, if not I might suggest this to the company.
When you built these backup machines did you try to find the exact hardware that was present in the original machine?
In this case, the applications use some other scheme such as a well-known node approach, where each peer knows about at least one other peer and they share this knowledge with other peers to form a loosely connected mass of nodes. This architecture, shown in Figure 3 , works just like the pure peer-to-peer architecture except that it relies on a central server for discovery of the other peers. In this model, the application usually notifies the central server of its existence at startup time or login time.
The peer application then uses this server to download a list of the other peers participating on its network that it can use to query for content. When content is needed, it goes through the list and contacts each peer individually with its request. Figure 3 P2P with a Simple Discovery Server In many cases, it is easier to make this solution scale better than the pure peer-to-peer option because it circumvents the issues of discovery by requiring only one request to the central server.
Note that it is possible to make pure peer-to-peer solutions scale extremely well, but if you are able to rely on a server for some of the basic tasks like discovery , high scalability can be achieved with a lower cost in terms of development time. However, this approach hinges on the availability of the central server.
If the central server is not available, the peer-to-peer application will not be able to find other peers. In addition, requesting content from each individual peer can be quite expensive from a network resource perspective.
This may not seem like a big deal if you're thinking about a few peers interacting over a network, but if your app is being written for use over the Internet or a large enterprise environment, this consideration suddenly becomes much more significant, scaling factorially.
This model, similar to the one shown in Figure 3 , extends the discovery server so that it also includes content lookup services. In this case, the peer application not only registers with a discovery server, but it also uploads a list of its contents at regular intervals. When an application is looking for some particular content, it queries the central server rather than sending a query to each client. The central server then responds with a list of the clients that contain the requested content, and the peer application can contact those clients directly to retrieve the content.
Quite often this approach will scale better than the previous options because it reduces the number of queries going over the network arguably one of the scarcest resources. However, this saving will incur a cost on the server. Servers are now more involved in the process of content sharing and the peer's demands will use significant resources. Just to show that this can actually come full circle, a system can be designed so that the peers can upload the content to the server as well, if you so choose see Figure 4.
Each peer registers with a server if needed , queries it for information, and transfers any desired content down from the server. The problem with this approach is that when content is downloaded from all of the clients, the server quickly becomes the bottleneck and is easily overwhelmed by the peers clients. Figure 4 P2P with a Discovery, Lookup, and Content Server To put this into perspective, consider a peer-to-peer application that shares video content.
Let's assume the application supports up to , peers, each containing megabytes of data. The total amount of content available to any one peer can quickly reach into hundreds of terabytes. While server capacity can always grow, placing such demand on the server can be costly and can create a significant number of bottleneck and reliability issues on the network.
NET Framework has a significant range of choices when it comes to the type of application that you can create.
When writing your peer-to-peer application, it is important to understand how it will be used. This will make it easier to decide which.
NET application model to use. In the case of peer-to-peer, four powerful application models or application types are available. A brief overview of these models follows. Web Services Found in the System. Services namespace, the Web Services technology provides an excellent way to handle registration, discovery, and content lookup for your peer-to-peer application. A Web Service allows you to quickly write a class that listens for incoming requests, processes them as they arrive, and sends back useful information in the form of objects that are easily understood by the peer application.
An example later in this article shows how a Web Service for a peer-to-peer application might be implemented. Windows Forms Found in the System. NET Framework solution for writing the type of rich Windows-based GUI applications that help to make the peer-to-peer experience much more exciting.
Windows Forms is the ideal technology for writing the GUI for the peer that lets your users log in, request, and share content. Web Forms Found in the System. This can be useful if you want to spice up your peer-to-peer application with general content about the service or advertisements about using the service.
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