[windows2000] Re: DFS cpu/disk overhead
- From: "Puetz, Christoph" <christoph.puetz@xxxxxxxxxxx>
- To: "'windows2000@xxxxxxxxxxxxx'" <windows2000@xxxxxxxxxxxxx>
- Date: Wed, 28 Jan 2004 15:23:20 -0700
The newer version of Robocopy is supposed to be more sophisticated and
stable. I used it with quite some success already.
Christoph
-----Original Message-----
From: Brian Anderson [mailto:BAnderson@xxxxxxxxxx]
Sent: Wednesday, January 28, 2004 3:15 PM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] Re: DFS cpu/disk overhead
ok thanks, I'm looking at that MS article right now.. Yeah, the 2 servers
are actually in the same room on the same switch. They're both 2k server. Is
there a difference between the original robocopy and the one that's on the
2k3 res kit?
Our problem with it was that we ran it every 15 minutes as a job. We have to
keep the directories relatively identical because they are part of medical
records. There are generally about 80-100 new documents added to the folder
every day or so.
thanks,
-brian
-----Original Message-----
From: Puetz, Christoph [mailto:christoph.puetz@xxxxxxxxxxx]
Sent: Wednesday, January 28, 2004 16:10
To: 'windows2000@xxxxxxxxxxxxx'
Subject: [windows2000] Re: DFS cpu/disk overhead
http://www.microsoft.com/windows2000/techinfo/planning/fileandprint/dfssteps
.asp
If the machines are on the same LAN it should work Ok. If you are operating
over a WAN - I don't know. It's not recommended. Windows NT Magazine has
quite some good resources, too.
http://www.winnetmag.com/
The basic thing is from what I heard. Hope that it works as advertised - do
not depend on it.
You could use Robocopy from the W2K3 resource kit for this task, too. Might
meet your requirements actually.
Christoph
-----Original Message-----
From: Brian Anderson [mailto:BAnderson@xxxxxxxxxx]
Sent: Wednesday, January 28, 2004 12:40 PM
To: Win2k List (E-mail); Win2k List (E-mail 2)
Subject: [windows2000] DFS cpu/disk overhead
was wondering if anyone has some experience using DFS to syncronize
directories across a pair of machines. The issue is that each of these
folders has about 12GB of small (150K or less) document files. In one of our
out of state server farms, I am adding a new file server to take the main
storage of the documents off of the primary database server, where they are
sitting now. We basically need an instant failover for the documents in case
the server decides to die.
What I'm wondering is does anyone know how the sync operation within DFS
actually works (or can point me to) an in depth explanation on how it works?
Is it a byte for byte copy, or does it just monitor changes between the 2
folders and copy appropriately. I know there are commercial applications
that look at just the file deltas and copy appropriately, but if DFS will
work, I'd rather implement that solution. I've been looking around on the
net and I can't really come up with anything useful.
Currently, there is some freeware app that a predecessor of mine installed
that basically does a software RAID1 across the shares. It's not as CPU and
disk hungry as the original robocopy solution, but it still eats up about
25-35% usage at times on an 8-way xeon box.
I'm heading down in a few weeks to set this up, and I need to have a plan of
action in place beforehand. Any help would be greatly appreciated
thanks,
-brian
Brian Anderson
Serapis Support
Correctional Medical Service
Office (314)919-9868
Mobile (314)239-1398
banderson@xxxxxxxxxx
http://www.serapisonline.com
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