I'm using Symantec LiveState recovery on Windows 2003 server.
The image files have to be transferred over a WAN link.
The problem I'm facing is that when I do a full back up, the images are
~ 30 GB, (compressed automatically when created).
What would be the best technology to compare two files over a WAN link
and only copy over the updated sections?
I was thinking about DFS, but I don't think it would work (in the
default configuration) because the file names change each week,
although the content of the file is nearly the same. Could a hard link
in conjunction with DFS be used for this?

[ Post a follow-up to this message ]

Thats an interesting problem.

You could use something like Single Instance Storage to index the files and
DFS to replicate them, but the file name is going to be an issue since most
programs track changes to a file. Is the filename changing, or the same file
with different names being created?

If the filename is changing, but the contents of the file is not, you can
look into Symantec's Volume Replicator since I believe it will replicate the
block level changes of a file.

If a new file is being created, this is going to be a tough problem since
most programs will not be able to associate the data in the new file with an
old file of a different name even though the data is nearly the same.

Nick


<timbrigham@gmail.com> wrote in message
news:1143431793.869890.30850@i39g2000cwa.googlegroups.com...
> I'm using Symantec LiveState recovery on Windows 2003 server.
> The image files have to be transferred over a WAN link.
> The problem I'm facing is that when I do a full back up, the images are
> ~ 30 GB, (compressed automatically when created).
> What would be the best technology to compare two files over a WAN link
> and only copy over the updated sections?
> I was thinking about DFS, but I don't think it would work (in the
> default configuration) because the file names change each week,
> although the content of the file is nearly the same. Could a hard link
> in conjunction with DFS be used for this?
>

[ Post a follow-up to this message ]

New files of different names are being created which contain almost
exactly the same data.

I ended up letting my Linux background show through to solve this one.

By using a bash script to copy and rename the files, I have nearly
identical files of the same name in two locations. At that point, I
started using rsync to synchronize the differences between the files.

[ Post a follow-up to this message ]