C# sends SQL data 4 times less from one box than from another

Posted by Bobb on Server Fault See other posts from Server Fault or by Bobb
Published on 2011-02-24T15:15:46Z Indexed on 2011/02/24 15:26 UTC
Read the original article Hit count: 315

Filed under:

windows-server-2003

|

networking

|

sql-server

|

c#

|

traffic-shaping

W2003, .NET 3.5, SQL 2008

I have prod and UAT app servers deployed in 2 different data centres. I have a C# app which reads text file, parse the text and sends the data to the SQL in bulk.

SQL server is in US and the app servers are in London (but in different places). All POPs have dedicated network connections. There is no public internet involved.

When the app runs on UAT server I can see in Perfmon that the Send byte/sec is x4 higher than from production server. My estimate is that one server outputs at 1 MB/s and the other at 250 KB/s rate.

My suspicion immediately is that there is a router on one of the DCs which shapes traffic or does QoS limitation on traffice from London to US.

However support and Windows team and networkig team all are saying that there are no differences in neither networking config on the 2 DCs nor NIC config on the 2 app server...

How to find out why is the networking bottlneck is 4 times tighter in one place than in the other? What can I do about it?

© Server Fault or respective owner

Related posts about windows-server-2003

Rotate monitor to portrait on Windows Server 2003 with ATI card

as seen on Super User - Search for 'Super User'
Does anyone know if it is possible to rotate a monitor from landscape to portrait mode on Windows Server 2003 32-bit with an ATI video card? According to Dell's site, I should be able to rotate my Dell P2310H monitor by installing drivers from their website, but they don't have drivers for Windows… >>> More
Windows Server 2003 Trial Activation Issue

as seen on Server Fault - Search for 'Server Fault'
I have a Windows Server 2003 (R2 Enterprise with SP2) VM, originally installed with a trial license. We forgot about the server, and now more than 120 days has passed, and I can't do anything with the server. I seem to be at a dead end with the existing installation. When I log in, I get: The… >>> More
Windows Server 2003 can't see Vista machine

as seen on Server Fault - Search for 'Server Fault'
Hi there, I've got a real PITA problem that I'm sure has a really simple solution. I have a Windows Server 2003 machine that needs to be able to see the network name of a Vista box - but refuses to. It can see the Vista box (and even access its shared folder) if I enter the Vista box's IP address… >>> More
Windows server 2003 default administrator password

as seen on Stack Overflow - Search for 'Stack Overflow'
Sorry if this is an overly simplistic question, but I'm a bit stuck here. :) I need a windows machine for me to do some programming for class. Since I have my Macbook with me everywhere I go, I figured that it would be easiest to install a vm. And since I can get a copy of Windows server 2k3 for… >>> More
Windows Server 2003 - Handling hundreds of simultaneous downloads

as seen on Server Fault - Search for 'Server Fault'
At the moment I have a single server with 4 1TB hard disks, daily I haver over 150 MP3 music files uploaded (around 80mb each). At busy periods there is over 300 people streaming / downloading these mixes all at once, 75% of the activity is on the most recently uploaded stuff which is all on a single… >>> More

Related posts about networking

Networking stopped working on Ubuntu

as seen on Super User - Search for 'Super User'
I installed Ubuntu 10.04 through the Wubi installer (Funny, I installed it today and thought I would have gotten 10.10). I had a network connection and everything was working fine. I rebooted my coumputer a couple of times and then suddenly, I could not connect to the network and when I click the… >>> More
Troubles with start up defenition of networking service in Ubuntu

as seen on Super User - Search for 'Super User'
I use Ubuntu 12.04.1. I put attention that networking script starting in runlevel 0: user@comp:/etc/rc0.d$ chkconfig -l networking networking 0:on 1:off 2:off 3:off 4:off 5:off 6:off When I try to move it working to appropriate run levels I get error: user@comp:/etc/rc0… >>> More
Installing the Elgg Social Networking CMS

as seen on Internet.com - Search for 'Internet.com'
One Open Source CMS that stands out above the rest for small businesses and personal networks is the Elgg open source "social engine," which can be used to create social applications. Scott Clark shows you how to install and get started with this social networking CMS. >>> More
OAuth: Token-Based Authorization for the Social Networking Age

as seen on Internet.com - Search for 'Internet.com'
The OAuth token-based authorization system allows users to grant third-party access to their resources without sharing their usernames and passwords. It's perfect for the age of data scattered across many social networking sites. >>> More
OAuth: Token-Based Authorization for the Social Networking Age

as seen on Internet.com - Search for 'Internet.com'
The OAuth token-based authorization system allows users to grant third-party access to their resources without sharing their usernames and passwords. It's perfect for the age of data scattered across many social networking sites. >>> More