Trying to open multiple CMD.EXE's to run simultaneously in my DTS Package

Posted on 2004-08-24
Last Modified: 2012-06-27
I have a SQL DTS job and at one point, I call five concurrent DOS processes in an attempt to spawn 5 file copy processes simultaneously.

Each of the 5 concurrent DTS steps runs a batch file that copies a file from a remote server to the local machine.  I am calling the batch file like:

start c:\Batches\FileCopy.bat

In the batch file, I have

copy MyFile c:\Files\

I thought that by using start and exit, my 5 DTS steps would cause 5 CMD.EXE's to be opened simultaneously, but when I watch Task Manager, I see one CMD.EXE, although the Process ID is changing constantly as the files are copied.

Can anyone tell me if this is working normally or how to cause 5 separate CMD.EXE's to be opened simultaneuosly?
Question by:ABaruh
LVL 23

Expert Comment

by:Saqib Khan
ID: 11889217
Why Dont you Create a JOB and Then Run each BAT file for Each STEP?

Author Comment

ID: 11889276
There's a lot more that is happening in the SQL that calls the BAT
LVL 19

Expert Comment

by:Melih SARICA
ID: 11889304
Yes its normal to see only one CMD o process list.

It does'nt run any process till a command runs. and every command creates a process on OS.

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Author Comment

ID: 11889382
non_zero, are you saying that I don't need to be concerned about seeing one CMD.EXE in Task Manager and that it is still running the various processes simultaneously?  Please clarify.

Nevertheless, why is it that if I open multiple command windows manually (by typing cmd in my Run dialog box) I will see a separate CMD.EXE for each of those windows?
LVL 11

Expert Comment

ID: 11889389
I don't think you can call 5 cmd.exe's in one DTS package with 5 steps.

Not sure what was logic inside this ...

But, you can create 5 DTS package and run them simulataneously. This might work.

Expert Comment

ID: 11890148
I don't think you are ever going to guarantee simultaneous copying.
If this is absolutley necessary you might want to consider creating a multi-threaded component in VB which creates 5 child objects, each of which wait on separate threads for an exact moment when they start copying together.
Even then, there may be some lag between copies.

Author Comment

ID: 11892448
You guys are getting away from the point.  I'm pretty sure this can be done as I can multi-copy manually if I open 5 dos windows and perform file copies simultaneously in each of them.  Let's focus on why I'm not seeing 5 CMD.EXE's launching.

Author Comment

ID: 11893597
I figured it out:

I had to create 5 separate SQL Server connections inside my DTS Package, and each of the 5 concurrent DTS steps were given their own SQL connection (each of the 5 DTS steps runs a stored proc that executes xp_cmdshell).
LVL 34

Expert Comment

ID: 11895195
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