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Connection Dropouts to Database on Windows Server 2008 R2 DFS

Posted on 2017-03-13
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Last Modified: 2017-03-14
Hi EE,

We have a legacy application that is installed locally on client machines and connects to a database which is stored on DFS. The problem is that program is losing connection randomly to the database it requires.  This problem started occurring after we started hosting our DFS in a Datacentre so I am sure it's a network issue of some sort, my query is there a way to prioritize resources on a DFS? If not how would I begin troubleshooting this issue?

Thank you.
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Question by:Zack
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Expert Comment

by:John Tsioumpris
ID: 42047190
I think you answered the question by yourself as you stated  " started hosting our DFS in a Datacentre"
I will take a guess and the DataCenter is not outside your premises and you are connected by some way...the problem relies on the connection...this is what it needs troubleshooting
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Author Comment

by:Zack
ID: 42047244
Hi John,

I agree John how would go about troubleshooting this, are there any tools to troubleshooting network connection issues on a Windows DFS.

Additionally, the user's access to the DFS isn't stopped just this programs access the DFS database file store is lost

https://technet.microsoft.com/en-us/library/cc962144.aspx

This article isn't of much help.

Any ideas>
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Expert Comment

by:John Tsioumpris
ID: 42047259
Can you give some more info on how you are connected to the Datacenter...?
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Author Comment

by:Zack
ID: 42047265
Hi John,

We are connecting via Cisco router which hands all external network connections. What type of details do you need I can inquire with vendor?

Thank you.
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John Tsioumpris earned 2000 total points
ID: 42047267
So its out of the premises....have you checked your network connectivity to see if its stable...some applications by nature are sensitive to latency and packet dropping...have you contacted the DataCenter to inform them about your issue...
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Author Comment

by:Zack
ID: 42047276
Hi John,

I have informed the datacentre about the issue they are unsure of where to start. I can check if the application has timeout option I can configure and set it for longer.

Thank you for the suggestions.
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Author Closing Comment

by:Zack
ID: 42047278
Thank you for the assistance.
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Expert Comment

by:John Tsioumpris
ID: 42047291
Since you have access to the code ( i guess since you control timeout) you could make a routine to log connection problems (timeout)...in what language your application is coded...?
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Author Comment

by:Zack
ID: 42047480
Hi John,

The language Visual Basic 6.0, I have already have contacted one of our developers about logging the connection issues at least I can capture it when it occurs.  

Thank you for the additional advice this will be long case either way :)
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Expert Comment

by:John Tsioumpris
ID: 42047489
I guess besides Logging you could implement some transaction mechanism so if the data are not delivered to retry to fetch them...
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Author Comment

by:Zack
ID: 42047490
Hi John,

Cheers for the link

https://docs.microsoft.com/en-us/sql/ado/reference/ado-api/begintrans-committrans-and-rollbacktrans-methods-example-vb

I will forward that on to the developer.

Thanks again.
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Expert Comment

by:John Tsioumpris
ID: 42047491
Hope you resolve it...
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