Looks like it's a good chunk of work.

However, working in this manner whereby huge checkins appear with little or no discussion is extremely frowned upon in the ASF. Maybe this was something that you were working on before the incubation started. However, it still would have been nice to get a heads up as to what was cooking in the kitchen and, even better, solicited opinions and help.


On Dec 30, 2008, at 12:10 PM, Andy Kurth wrote:

Hi Alan,
This is to add management node support for Windows Vista. I have been working on getting VCL to support Vista and it's now in a working state. We will use Vista as a proof of concept for the OS modularization design since its initial use will be minimal.

OS modularization is an extension to the major changes made from version 1.x to 2.0. Prior to 2.0, calls to interact with different components which VCL utilizes or supports were intermingled throughout the code and controlled by if/else statements. This made the task of adding support for additional components difficult.

Starting with version 2.0, we modularized the parts of the code which interact with the provisioning engines. We use the term "provisioning engine" to mean the systems which can perform the basic tasks to prepare a machine. The provisioning engines currently supported are xCAT 1.3, VMWare, and an interface to utilize NCSU's Solaris lab machines when the labs are closed. Each provisioning engine module, xCAT.pm for example, implements a common set of generically-named subroutines. These are called by the core VCL modules such as new.pm or image.pm.

Also for version 2.0, the predictive reloading logic has been modularized in the same manner. This is the algorithm used to determine which image is loaded on a machine when a reservation is complete.


Alan D. Cabrera wrote:
On Dec 30, 2008, at 10:31 AM, arku...@apache.org wrote:
Author: arkurth
Date: Tue Dec 30 10:31:23 2008
New Revision: 730210

URL: http://svn.apache.org/viewvc?rev=730210&view=rev
Copied trunk to branches/before-modularized-os. This was done before making a large commit to trunk for the modularized OS/Vista code.

    - copied from r730209, incubator/vcl/trunk/

What is this "modularized OS/Vista code" work?

Andy Kurth
Virtual Computing Lab
Office of Information Technology
North Carolina State University

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