Delta Changes on a Server

There are a set of servers that will need to be replicated to another site. The secondary site will house an exact replica of the data that is in the original servers. The software that we will be using in order to replicate the servers is a mixture of DoubleTake, DFS and vRanger. In order for the replication to occur over the Internet we need to provision an Internet connection that is big enough to sustain all of the changes that occur after the initial seeding of the data. We dont want to provision an Internet connection with too much bandwidth because we will be paying too much and we dont want to provision a pipe that is too small. The Internet connection will need to be purchased before the hardware and software are purchased due to construction times.

A piece of software or tool or method that will report the bit-level changes on a day-to-day basis prior to the hardware and software being purchased is the preferred way of provisioning the Internet connection. This will give us a very specific metric for the Internet connection. Does anyone know of a way to determine the bit level changes to all of the files on a set of Windows server running various applications such as Exchange, SQL, BES and file-print?
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za_mkhIT ManagerCommented:
I guess you are doing this for DR. Could you not create a 'virtual site' on your LAN, hidden behind a router/firewall and go through the process of duplicating the site, and then use NetWork Monitor/Performance Monitor to monitor the amount of data being transferred?
Epic_SupportAuthor Commented:
Thank you for respoding to my question! Any help with this is greatly appreciated.

Yeah, that is an option. Unfortuneately, the hardware isn't going to be purchased until well after the Internet has been purchased. There might be a finite amount of bandwidth and if the servers that I want to replicate require too much bandwidth then I might reduce the number of servers that I am replicating which would reduce the amount of hardware that I will be purchasing and so on.
za_mkhIT ManagerCommented:
If you haven't bought the kit, I guess the best way to do see the amount of changes is through your backup software? Do a full backup, and then do a Diffrential backups for a I guess three weeks thereafter and monitor the size of those diffrential backups. Granted they would not be the same as a delta change but it at least gives you an idea of the amount of change on a daily / weekly basis which would at least allow you to have a meaningful insight into your environment which would allow you to provision your Wan Link.

You may be backing up your enviroment in such a manner already - so you could look at your historical logs to get the information you need.

I personally don't like diffrential backups (too much pain in restoring) so I would advise that you if do not already implement a similar setup, to add this to your current backup regime, for your testing purposes.

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