Maximum Data Flow Tasks Execution
Sep 10, 2006
Hi guys,
i got a foreach loop that has about 20 data flow tasks(same database connections but different extractions) but i notice that when i execute the project it only runs 4 data flow tasks at a time.
i know that there is an option for each data flow to set the "Engine Threads", but is there a way to set the thereads in a foreach loop or for the whole project so it will execute all data flow tasks in one go for each loop.
please help???
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Jan 17, 2008
Dear All!
My package has a Data Flow Task. In Data Flow Task, I use a Script Component and a OLE BD Destination to transform data from txt file to database.
Within Data Flow Task, I want to call File System Task to move file to a folder or any Task of "Control Flow" Tab. So, Does SSIS support this task? Please show me if any
Thanks
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Aug 3, 2007
When I copy over an SSIS package I have been developing from my laptop to my desktop with Windows File Sharing (shared folders) across a home network, the moved package fails to load properly. I can see the Control Flow tasks but not the Data Flow tasks - they simply disappear! I have update the Connection Managers to point to the new machine, and tested them (OK).
Its the same as this issue posted here
And Here
Creating an empty package and clicking to create a new data flow cause this error:
TITLE: Microsoft Visual Studio
------------------------------
Failed to create the task.
------------------------------
ADDITIONAL INFORMATION:
The designer could not be initialized. Microsoft.DataTransformationServices.Design)
Seems the only way is to uninstall and reinstall Client Components.
How do I uninstall and reinstall Client Components? when I try to do that, SQL Server Setup tells me "None of the selected features can be installed or upgraded. Setup cannot procees since there is no effective change being made to the machine...."
I had selected "Workstation components, Books online and Development tools". This is already installed - so how I can reinstall it if I get this message above which does not let me proceed.
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Apr 17, 2006
Hello,
I have created around 10 seperate packages for our application data load. Now I am planning to create a master package (or a wrapper package) which will execute all the 10 packages (thru execute package task). Then I have a job which executes the master package at a given date and time.
Question : How can I enable / disable execution of each package within the master package depending upon a flag variable. The reason why I need this mechanism is if the flag = 0 then I don't want all 10 packages within master package to execute and if flag = 1 then master package execution should begin and subsequently execute all packages within that master package.
Thank you
Jatin Shah
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Sep 25, 2006
Hi guys,
i have a for each loop and it has about 20 data flow tasks (simple data extractions). i notice when i run the package it only runs up to 4 data flow tasks at a time. others have to wait till one of the first 4 flows finishes.
i was wondering if there's a way to change the limit of how many data flow tasks can run at a time. is there a property some where ?
i know this will be stressfull to the server, but the server is well equiped with CPU power and memory, so performance will not be an issue.
any thoughts?
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Mar 9, 2007
Hey all, is there any explanation why just opening a data flow task causes a VSS check out?
The issue with this is that I have multiple developers, and when one wants to look at a data flow task in a package already checked out, it generates multiple VS errors.
Not big on the priority list, (not as big as the modal dialog issue) but still a pain.
Thanks!
BobP
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Jul 25, 2007
What are the advantages and disadvantages of having multiple data flow tasks in one SSIS package?
Is this a good idea at all considering the workflow may be similar now but may change in the future? Should it be left as one data flow per package?
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May 31, 2006
I have a problem selecting maximum values inside a data flow, when the field is varchar. For example, I could have an incoming text file with following rows (the real life problem is a bit more complicated, but the idea is the same)
ID Desc
1 Car
1 Truck
1 Bicycle
2 Horse
2 Cow
Now I would like to group by ID, and have the maximum value from the Desc field, resulting
ID Desc
1 Truck
2 Horse
I tried to sort the data flow first with ID ascending and Desc descending, followed by sort with ID ascending and "Remove duplicate sort values" turned on. However, the sort does not seem to select the first Desc value it gets, because the result is.
ID Desc
1 Bicycle
2 Horse
If you have any hints, how to tackle this problem, please help!
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Jan 2, 2008
Hi,
I need to parameterize some values in the data flow so that i can chnage the values directly in parameter file and re run the data flow for new value in the passed in the parameter. This can be easy for other who do not know about the flow of data flow task as to where to change the variable/parameter.
How can this be accomplished. I want the data flow task to refer to this file before it starts executing and pick the appropriate value from the file.
Or is their any better way to accompalish what i want to do here in SSIS.???
tHNAKS FOR UR HELP FOLKS !!!
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Feb 11, 2014
I have a requirement to read an encrypted file as a data source. I am not allowed to save an unencrypted text file version on disc at any time for any length of time, therefore I created a custom source component that reads an encrypted csv file, decrypts it, and then passes each row of data to the pipeline and ultimately to an ole data destination. Basically it is just a text file reader with an added class that adds functionality that decrypts the file before the component sets columns or reads rows.
The custom component, “Encrypted File Source”, has a custom property “encryptionkey” with the encryption required flag set to true (code below) and is declared as eligible to be set in the expressions.
IDTSCustomProperty100 EncryptionKey = ComponentMetaData.CustomPropertyCollection.New();
EncryptionKey.Name =
"EncryptionKey";
EncryptionKey.Description =
"Secure String key value to decrypt the file";
EncryptionKey.Value =
string.Empty;
EncryptionKey.ExpressionType =
DTSCustomPropertyExpressionType.CPET_NOTIFY;
EncryptionKey.EncryptionRequired =
true;
I want to be able to set the password for the encrypted file in the SQL Agent job that executes the SSIS project. This means I have an environment with a variable, “DataPassword”, that is set to sensitive. It maps to a Project parameter in the SQL Agent job that is also set to sensitive. And I now I want to access that sensitive Project Password inside my data flow, specifically in the Encrypted File source task that I created and set my EncryptionKey to that Project Parameter.
The problem is that SSIS says.
"expression cannot be evaluated. ... The Expression will not be evaluated because it contains sensitive parameter value "$Project::DataFilePassord" . Verify that the expression is used properly and that it portects sensitive information"
((Microsoft.DataTransformationsServices.Controls) "<v:shapetype coordsize="21600,21600" filled="f" id="_x0000_t75" o:preferrelative="t" o:spt="75"
path="m@4@5l@4@11@9@11@9@5xe" stroked="f">
[Code] ....
I am using SQL Server 2012, on a windows 7 box with VS2010 premium.
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Mar 6, 2007
HI All,
In several threads there has been discussion regarding adding connection managers to a package's data flow, etc. My challenge is that I have a large solution that contains many packages, and I need to change the connection manager linked to the data flow in all of the packages. When the solution was initially designed, data sources were used, and it has become a tedious maintenance issue to keep those in sync. We want to use a standard OLEDB connection manager, but adding a connection manager to each package and editing the corresponding data flow tasks in each package to use that new connection manager is a daunting task. I've coded a .Net module to access the packages, remove the old connection manager (data source) and add the new OLEDB data source. However, as I traverse the objects in the package hierarchy, when I come to the data flow object, the innerobject is not a dts object, but rather a _com object.. I can't seem to find any documentation/examples as to how to iterate the tasks within a data flow and change the connection manager. If you have any information, that would be quite helpful. If you reply with a code sample, if you would be so kind as to relate it to one of the sample packages provided with SSIS so I can run it, that would be great.
Thank you.
Steve.
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Jul 16, 2007
Hi Guys,
I have yet another question. How can i pass data b/w 2 data flow tasks? I'm trying to get some data from one sql server and then I want to pass this whole bunch of data to another data flow task which is going to get some data from second sql server. I would probably combine them using union all and then save that as a transaction in a third sql server?
Information regarding how to pass the data with some detailed discussion would be fine with me.
thanks
Gemma
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Nov 3, 2015
Suppose if I have a “Foreach Loop Container” that iterates over a list. Is it possible to execute different data flow tasks based on the input?
Example : List contains elements L1, L2 & L3.
ForEach Loop Container checks the input. If its L1 then it should execute DF Task1, If L2 then execute
DF Task2 and similarly for L3.
Is it possible to achieve this?
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May 16, 2008
Hi,
How do I retrieve the connections (connection managers) collections from Custom Data Flow destination? ComponentMetadata.RuntimeConnectionCollection is empty. I would like to be able to access all the connections defined in the package from the custom data flow task.
I came across code in which it was possible to access the Connections collection using the IDtsConnectionService for custom task (destination). The custom task has access to serviceProvider, whcih can be used to get access to the IDtsConnectionService interface but not the custom data flow task.
Any help appreciated.
Thanks
Naveen
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Jul 2, 2015
Is it possible to do? I'm getting lock violations in I try to execute several tasks in parallel.
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May 29, 2006
Hi guys,
I would like to know what happens during the different phases when executing a data flow task. I noticed that there are the validation, prepare for execute, pre-execute, execute, post-execute, and cleanup phases.
We all know that the execute phase is the actual execution of the desired data flow (source to destination) but I was wondering what the other phases do. Knowing what happens during those phases will help me optimize the whole execution. 1 question raised by someone here is "what is the difference between the Prepare for Execute phase and the Pre-Execute phase? and what does the validation phase do?
Thanks in advance for the help you can give
Kervy
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Apr 25, 2008
I have one Data flow, which trasfer data into two table (Parent & Child) .
My question is : Is there a way, i can load data first into parent and then child table. because child table getting load first after that parent table loading. (Execution should be Source Parent --> Destination Parent) First , (Source Child --> Destination Child) Second.
In my case its executing reverse. So i have foreign key constraints at child table , its giving foreign contraints error while running ssis package
Can any one tell me,
How to define my own sequence execution at the Data flow task (Source - Destination) ?
Thanks
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Dec 7, 2005
I have a SSIS (CTP June 2005) package with several data flow tasks. One data flow has 2 OLEDB data sources which are then unioned together, followed by a conditional split, then a derived column transformation, which feeds into an OLEDB destination. When I run the package, this particular data flow seems to run fine and then just stops. There are no errors and the records counts don't move. I've used data viewers to look at the data and it seems fine. I've switched the OLEDB destination with a flat file and execution runs fine, then switched back to OLEDB and it hangs again (over and over). There's nothing unusual about the OLEDB destination, and all the other OLEDB destinations work fine. It also seems to hang on the same destination row number count, but again that row has been verified as valid. In fact, I dropped the DB table and recreated it with no constraints and all fields nullable, but the problem persists. Help?
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Apr 13, 2007
I have a package that loads staging tables from an Oracle source DB. In the data flow tab I have 30+ read table/write table task combinations. When I run the package 3-4 of the read/write combos execute at a time. What I'm trying to control is the priority order of the combo execution. My goal is to minimize to total load time by having the larger table transfers run first and the smaller table transfers fill in until they are all complete. Currently, the largest table (16 million) transfers last (because it was the last combo that I created?).
Thanks,
Dave
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Aug 1, 2006
Has anyone come up/determined a generic way to capture and log indicative information within a data flow in SSIS - e.g., a number of rows selected from the source, transformed, rejected, loaded, various timestamps around these events, etc.? I am trying to avoid having to build a custom solution for each of the packages that I will have (of which there will be dozens). Ideally, I'd like to have some sort of a generic component (such as a custom transformation) that will hide the implementation details and provide a generic interface to the package.
It is not too difficult to achieve something similar on the control flow level, but once you get into data flows things get complicated.
Any ideas will be greatly appreciated.
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Feb 20, 2007
Hi, folks!
I got a serious problem with an SSIS-Import. My packages import from a foreign source into a kind of temp-table (actually it's not a temporary table, its just filled with data and truncated after completion of the package), do some transformations and then I got a data flow task that simply copies all the rows from the "temp" to the final table. I get the following errors (here there are two simultanious copy operations from two different "temps" into the same final table.
Error: 0xC0202009 at _temp to finaltable 5 2 1, OLE DB Destination [16]: An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Transaction (Process ID 68) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.".
Error: 0xC0209029 at _temp to finaltable 5 2 1, OLE DB Destination [16]: The "input "OLE DB Destination Input" (29)" failed because error code 0xC020907B occurred, and the error row disposition on "input "OLE DB Destination Input" (29)" specifies failure on error. An error occurred on the specified object of the specified component.
Error: 0xC0047022 at _temp to finaltable 5 2 1, DTS.Pipeline: The ProcessInput method on component "OLE DB Destination" (16) failed with error code 0xC0209029. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
Error: 0xC0047021 at _temp to finaltable 5 2 1, DTS.Pipeline: Thread "WorkThread0" has exited with error code 0xC0209029.
Error: 0xC02020C4 at _temp to finaltable 5 2 1, OLE DB Source [1]: The attempt to add a row to the Data Flow task buffer failed with error code 0xC0047020.
Error: 0xC0047038 at _temp to finaltable 5 2 1, DTS.Pipeline: The PrimeOutput method on component "OLE DB Source" (1) returned error code 0xC02020C4. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
Error: 0xC0047021 at _temp to finaltable 5 2 1, DTS.Pipeline: Thread "SourceThread0" has exited with error code 0xC0047038.
Information: 0x40043008 at _temp to finaltable 5 2 1, DTS.Pipeline: Post Execute phase is beginning.
Information: 0x402090DF at _temp to finaltable 5 2 1, OLE DB Destination [16]: The final commit for the data insertion has started.
Information: 0x402090E0 at _temp to finaltable 5 2 1, OLE DB Destination [16]: The final commit for the data insertion has ended.
Information: 0x40043009 at _temp to finaltable 5 2 1, DTS.Pipeline: Cleanup phase is beginning.
Information: 0x4004300B at _temp to finaltable 5 2 1, DTS.Pipeline: "component "OLE DB Destination" (16)" wrote 5041 rows.
Task failed: _temp to finaltable 5 2 1
Warning: 0x80019002 at KDStat_alles_412: The Execution method succeeded, but the number of errors raised (7) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Task failed: 412
Warning: 0x80019002 at kdstat_alles_master: The Execution method succeeded, but the number of errors raised (7) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Error: 0xC0202009 at _temp to finaltable 1 2 1, OLE DB Destination [4468]: An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Transaction (Process ID 82) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.".
Error: 0xC0209029 at _temp to finaltable 1 2 1, OLE DB Destination [4468]: The "input "OLE DB Destination Input" (4481)" failed because error code 0xC020907B occurred, and the error row disposition on "input "OLE DB Destination Input" (4481)" specifies failure on error. An error occurred on the specified object of the specified component.
Error: 0xC0047022 at _temp to finaltable 1 2 1, DTS.Pipeline: The ProcessInput method on component "OLE DB Destination" (4468) failed with error code 0xC0209029. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
Error: 0xC0047021 at _temp to finaltable 1 2 1, DTS.Pipeline: Thread "WorkThread0" has exited with error code 0xC0209029.
Error: 0xC02020C4 at _temp to finaltable 1 2 1, OLE DB Source [1]: The attempt to add a row to the Data Flow task buffer failed with error code 0xC0047020.
Error: 0xC0047038 at _temp to finaltable 1 2 1, DTS.Pipeline: The PrimeOutput method on component "OLE DB Source" (1) returned error code 0xC02020C4. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
Error: 0xC0047021 at _temp to finaltable 1 2 1, DTS.Pipeline: Thread "SourceThread0" has exited with error code 0xC0047038.
Well, it looks like those two processes simply deadlock each other. But there are 11 Simultanious Data Imports which all go fine. The Issue only occurs at those two. The structure of the packages is exactly the same everywhere.
Is it possible that a previous update-sql query hasent committed properly and locks the datasets?
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Apr 16, 2007
I want to get the start time of data load and end time after data load and store it in a table which has mapping_id , mapping_name,start_time,end_time.
i use ActiveXScript task to get the start time before data load and store the mapping_id in a global variable,then data flow transformation occurs.
i want to use a global variable to store the mapping id ,so that i can update the end time after data load with that variable.how to do this?
is there any other way, i can get the start and end time of data load (other than the logging information)?
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Feb 17, 2006
I'm not exactly sure how to ask this question ... but here goes!!
I want to get an idea of how SSIS actually executes transformation tasks.
Do transformation tasks (eg a lookup) complie down to managed code or are the executed as SQL commands in a SQL server database?
Thanks.
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Apr 19, 2007
Hi folks,
I have come across a situation where there 10 tasks. The second task on the flow is a script task which disables all further tasks based on a condition. I thought that the logic would be better if we force terminate the package successfully at this stage itself. How can this be done.
Thanks
Subhash Subramanyam
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Jun 9, 2006
Hi,
I'm facing a problem with my SSIS package regarding the execution order of tasks. I am using my package for the purpose of loading data from XML to staging tables in the database, and have a loop to process all XML files.
As a precondition to the loading action itself, I am running a stored procedure against the database (using the ExecuteSQL task) to check whether all staging tables are empty. The output parameter of that stored procedure is mapped to a variable I have defined in the SSIS package, so I can use it as a basis for the decision whether to run the loading action or not.
In order to test my package I added a script task, right after the execution of the stored procedure with a precedence constraint, that pops up a messagebox with the value of the stored procedure return value stored in the package variable.
The problem is that for the first iteration of the loop, the variable value presented by the messagebox is incorrect (equals to the initial value I assigned to the variable), and it looks like the script task starts before the stored procedure execution task finishes and its output value is stored in the package variable.
Please assist.
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Aug 29, 2007
Hello,
Is it possible to use existing data flow components (Merge Join, aggregation,...) in a custom data flow component?
Thanks,
Yoann
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May 23, 2008
Hello,
I want to know detail execution flow of SSIS package (like Validation -> Expression evaluation -> Execution etc.)
Where can I get detail information, any reference (links)?
Thanks in advance.
-Omkar.
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Aug 10, 2007
Hi All,
Just needed an insight into the IF-ELSE construct w.r.t its implementation in SSIS or a similar methodology that could be adopted in SSIS while executing a Package.
Scenario : I want to Start with importing data from Different sources to SQL Server Destination. For Which, i define 3 different Data Flow Tasks each involved in importing data from an external source to SQL Server Destination.
1] Text File Inbound Task : Source - Flat File Source ; Destination - SQL Server Dest.
2] Excel Inbound Task : Source - Excel Data Source ; Destination - SQL Server Dest.
3] Xml Inbound Task : Source - XML Data Source ; Destination - SQL Server Dest
Finally i want to execute the package with an IF-ELSE Scenario which will Check for the external Source being :
IF External Source = = Excel file => Execute Excel Inbound Task
ELSE
EXIT
IF External Source = = Text File/Flat File = > Execute Text File Inbound Task
ELSE
EXIT
IF External Source = = Xml File => Execute Xml Inbound Task
ELSE
EXIT
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Oct 25, 2006
Greetings.
I'm trying to conditionally execute a dataflow based on the presence of a data file. If the data file isn't present, I'd like to execute gracefully without error.
Logic is as follows:
If FileExists Then
execute dataflow
Else
exit w/o error
End If
I've got the code ready to go, but I'm not sure how to do this conditional branch logic. Right now, the code calls the Dts.Results.Success / Failure. The problem, however, is Failure is exactly that... which doesn't result in the graceful exit I'm looking for.
Anyone have any ideas?
Thanks in advance.
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Apr 18, 2007
Hello all,
Is there documentation somewhere about multiple execution paths in SSIS control flow? I didn't find documentation anywhere. I have a situation where I have two tasks that take considerable time, but could be executed in parallel (to speed up things) and I was wondering whether SSIS supports parallelism.
To illustrate the issues in simultaneous execution, I created a test SSIS package. In the package, I have five tasks, let's call them T1, T2, T3, T4 and T5. The taks are connected with "green arrows" like this:
T1->T2
T1->T3
T2->T4
T3->T4
T5 is not connected. The tasks can be e.g. Send Mail tasks, that's not relevant to this issue. I put a breakpoint in each task and execute the package.
When I execute package, T1 and T5 become active, i.e. the arrow that displays where the package execution currently is, is in two tasks simultaneously. Now F10 (step over) doesn't seem to work "Unable to step. Not implemented". If I press F5 nothing happens. After I press F5 for a second time tasks T1 and T5 and executed. Why don't they execute with the first pressing of F5? I would additionally like to know whether these two tasks are executed in parallel or sequentially, i.e. in the same thread or in two threads? Is there documentation of this?
The execution stops at T2&T3. Again, pressing F5 doesn't do anything, but the second time I press F5 T2 and T3 are executed.
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Dec 13, 2007
Hi,
I'm building a package wherein I perform a SQL task(A) if the error log is not empty. This same SQL task(A) is also being used by another data flow task(B). The precedence points from B to A bottom to top. When I execute, all the tasks in the downward direction (precedence pointing downward/sideways) execute but this one doesnt as it points updwards. I can copy and paste task A and make B point to A downward, but I dont want to duplicate A in the same package.
Is there any other approach?
If you dont understand the above, see the flow:
X (SQL task) ----on success-------------> A (SQL task)
| ^
| |
...(sequence of steps) |
| |
| |
B(Data Flow Task) ---------failure --------|
Execution flow doesnt move from B to A, even though its a failure condition. Hope this explains the problem.
Thanks and Regards,
Subha Fernando
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Feb 14, 2006
Hi, All,
I need to pass a parameter from control flow to data flow. The data flow will use this parameter to get data from a Oracle source.
I have an Execute SQL task in control flow to assign value to the Parameter, next step is a data flow which will need take a parameter in the SQL statement to query the Oracle source,
The SQL Looks like this:
select * from ccst_acctsys_account
where to_char(LAST_MODIFIED_DATE, 'YYYYMMDD') >?
THe problem is the OLE DB source Edit doesnt have anything for mapping parameter.
Thanks in Advance
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Mar 9, 2007
I have an Execute SQL Task that returns a Full Rowset from a SQL Server table and assigns it to a variable objRecs. I connect that to a foreach container with an ADO enumerator using objRecs variable and Rows in first table mode. I defined variables and mapped them to the columns.
I tested this by placing a Script task inside the foreach container and displaying the variables in a messagebox.
Now, for each row, I want to write a record to an MS Access table and then update a column back in the original SQL Server table where I retreived data in the Execute SQL task (i have the primary key). If I drop a Data Flow Task inside my foreach container, how do I pass the variables as input to an OLE DB Destination on the Data Flow?
Also, how would I update the original source table where source.id = objRects.id?
Thank you for your assistance. I have spent the day trying to figure this out (and thought it would be simple), but I am just not getting SSIS. Sorry if this has been covered.
Thanks,
Steve
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