| Author |
Message |
Dave
Guest
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 Posted:
Fri Sep 09, 2005 12:51 pm Post subject:
DFS Transfer Of Large Files (Backups) |
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We have a domain (all windows 2003 server SP1) connected across a site-site
vpn using ISA 2004 on a DC at each end. This is the top level tree in a
forest. Each site has its own tree in the forest. Everything else appears to
be working perfectly, all DCs are replicating, exchange organisation works
fine across the sites.
A test DFS structure is in place which works fine with small files but our
trouble appears to be when trying to replicate large backup files (*.bkf)
between sites (replication occurs fine between site DCs).
We have attempted the following:
a) Replication schedule on 24/7.
b) Replication schedule b/n 18:00 and 08:00 (as ADSL download speed is
affected on site 2, when DFS replication is on ADSL download speed decreases
from a typical 1800kbps to b/n 80 & 600 kbps)
Connection between sites is
Site 1: 1MB ADSL (256 KB Upload)
Site 2: 2MB ADSL (256 KB Upload)
Site 2 has the source files and is trying to replicate to site 1.
Questions are as follows:
1) Does DFS using FRS struggle with file sizes of b/n 1GB and 3GB?
2) Does DFS sing FRS restart file replication when using scheduled times
rather than 24/7?
2) Why does site 2's download speed drop so significantly if it can only
upload at 256 kbps.
Anyones thoughts would be deeply appreciated?
My thanks in advance Dave. |
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Paul Williams [MVP]
Guest
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| Posted:
Mon Sep 12, 2005 8:52 pm Post subject:
Re: DFS Transfer Of Large Files (Backups) |
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| Quote: | 1) Does DFS using FRS struggle with file sizes of b/n 1GB and 3GB?
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I believe FRS can cope with files this size, but you have to tweak the
journal size and ensure the WAN can cope, as it does it on a per-file bases.
| Quote: | 2) Does DFS sing FRS restart file replication when using scheduled times
rather than 24/7?
|
Replication is notification based. Only changed files are replicated. As
for what happens if the schedule elapses and replication is still taking
place I cannot say, as I've never seen the scenario. I would assume it
would complete, as the schedule affects only the notifications as far as I'm
aware.
| Quote: | 2) Why does site 2's download speed drop so significantly if it can only
upload at 256 kbps.
|
I can't answer that at the moment. A network trace would be beneficial
here.
I would say you might be better off either purchasing specific
bulk-replication software, or holding off for a couple of months and looking
at DFSR in Windows Server 2003 R2.
--
Paul Williams
Microsoft MVP - Windows Server - Directory Services
http://www.msresource.net | http://forums.msresource.net |
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Yaacov Klapisch
Guest
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| Posted:
Tue Sep 20, 2005 12:50 pm Post subject:
Re: DFS Transfer Of Large Files (Backups) |
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Hi Paul,
I have apparently a similar problem:
I created a replication of a folder containing a lot of files in many
folders (over 100 folders + many subfolders) totalling some 30gb. In one of
the folders I have two zip files of 1.51 gb.
The replication stopped on these files and doesn't continue.
As you say, I should try tweaking the journal. How do I do that?
"Paul Williams [MVP]" <ptw2001@hotmail.com> wrote in message
news:u1kWzW8tFHA.2576@TK2MSFTNGP10.phx.gbl...
| Quote: | 1) Does DFS using FRS struggle with file sizes of b/n 1GB and 3GB?
I believe FRS can cope with files this size, but you have to tweak the
journal size and ensure the WAN can cope, as it does it on a per-file
bases.
2) Does DFS sing FRS restart file replication when using scheduled times
rather than 24/7?
Replication is notification based. Only changed files are replicated. As
for what happens if the schedule elapses and replication is still taking
place I cannot say, as I've never seen the scenario. I would assume it
would complete, as the schedule affects only the notifications as far as
I'm
aware.
2) Why does site 2's download speed drop so significantly if it can only
upload at 256 kbps.
I can't answer that at the moment. A network trace would be beneficial
here.
I would say you might be better off either purchasing specific
bulk-replication software, or holding off for a couple of months and
looking
at DFSR in Windows Server 2003 R2.
--
Paul Williams
Microsoft MVP - Windows Server - Directory Services
http://www.msresource.net | http://forums.msresource.net
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Paul Williams [MVP]
Guest
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| Posted:
Thu Sep 22, 2005 8:51 am Post subject:
Re: DFS Transfer Of Large Files (Backups) |
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You increase the NTFS USN Journal by modifying the registry value:
Ntfs Journal size in MB
Which is located under the key:
HKLM\ SYSTEM\ CurrentControlSet\ Services\ NtFrs\ Parameters
NOTE. Once you increase the Journal Size you should not lower it again -
you must rebuild the machine.
--
Paul Williams
Microsoft MVP - Windows Server - Directory Services
http://www.msresource.net | http://forums.msresource.net |
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