GeekInterview.com
   Home |  Tech FAQ  |   Interview Questions |  Placement Papers |  Tech Articles |  Learn |  Freelance Projects |  Online Testing |  Geeks Talk |  Job Postings |  Knowledge Base | Site Search |  Add/Ask Question

GeekInterview.com  >  Interview Questions  >  Data Warehousing  >  Informatica
Go To First  |  Previous Question  |  Next Question 
 Informatica  |  Question 11 of 630    Print  
What is Load Manager?

Comment posted by: Deb on 2005-06-08 00:56:53

Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and carry out workflow tasks.When the PowerCenter Server runs a workflow, the Load Manager performs the following tasks: 
 
1. Locks the workflow and reads workflow properties. 
2. Reads the parameter file and expands workflow variables. 
3. Creates the workflow log file. 
4. Runs workflow tasks. 
5. Distributes sessions to worker servers. 
6. Starts the DTM to run sessions. 
7. Runs sessions from master servers. 
8. Sends post-session email if the DTM terminates abnormally. 
 
When the PowerCenter Server runs a session, the DTM performs the following tasks: 
1. Fetches session and mapping metadata from the repository. 
2. Creates and expands session variables. 
3. Creates the session log file. 
4. Validates session code pages if data code page validation is enabled. Checks query 
conversions if data code page validation is disabled. 
5. Verifies connection object permissions. 
6. Runs pre-session shell commands. 
7. Runs pre-session stored procedures and SQL. 
8. Creates and runs mapping, reader, writer, and transformation threads to extract,transform, and load data. 
9. Runs post-session stored procedures and SQL. 
10. Runs post-session shell commands. 
11. Sends post-session email.




  
Total Answers and Comments: 1 Last Update: June 08, 2005   
  
 Sponsored Links

 
 Best Rated Answer
—
Submitted by: Deb
 
I am providing the answer which I have taken it from Informatica 7.1.1 manual, 
 
Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and carry out workflow tasks.When the PowerCenter Server runs a workflow, the Load Manager performs the following tasks: 
 
1. Locks the workflow and reads workflow properties. 
2. Reads the parameter file and expands workflow variables. 
3. Creates the workflow log file. 
4. Runs workflow tasks. 
5. Distributes sessions to worker servers. 
6. Starts the DTM to run sessions. 
7. Runs sessions from master servers. 
8. Sends post-session email if the DTM terminates abnormally. 
 
When the PowerCenter Server runs a session, the DTM performs the following tasks: 
1. Fetches session and mapping metadata from the repository. 
2. Creates and expands session variables. 
3. Creates the session log file. 
4. Validates session code pages if data code page validation is enabled. Checks query 
conversions if data code page validation is disabled. 
5. Verifies connection object permissions. 
6. Runs pre-session shell commands. 
7. Runs pre-session stored procedures and SQL. 
8. Creates and runs mapping, reader, writer, and transformation threads to extract,transform, and load data. 
9. Runs post-session stored procedures and SQL. 
10. Runs post-session shell commands. 
11. Sends post-session email.

Above answer was rated as good by the following members:
vivek1708
June 08, 2005 00:56:53   #1  
Deb        
RE: What is Load Manager?
I am providing the answer which I have taken it from Informatica 7.1.1 manual, 
 
Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and carry out workflow tasks.When the PowerCenter Server runs a workflow, the Load Manager performs the following tasks: 
 
1. Locks the workflow and reads workflow properties. 
2. Reads the parameter file and expands workflow variables. 
3. Creates the workflow log file. 
4. Runs workflow tasks. 
5. Distributes sessions to worker servers. 
6. Starts the DTM to run sessions. 
7. Runs sessions from master servers. 
8. Sends post-session email if the DTM terminates abnormally. 
 
When the PowerCenter Server runs a session, the DTM performs the following tasks: 
1. Fetches session and mapping metadata from the repository. 
2. Creates and expands session variables. 
3. Creates the session log file. 
4. Validates session code pages if data code page validation is enabled. Checks query 
conversions if data code page validation is disabled. 
5. Verifies connection object permissions. 
6. Runs pre-session shell commands. 
7. Runs pre-session stored procedures and SQL. 
8. Creates and runs mapping, reader, writer, and transformation threads to extract,transform, and load data. 
9. Runs post-session stored procedures and SQL. 
10. Runs post-session shell commands. 
11. Sends post-session email.
 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 0Overall Rating: +1    

 Related Questions

Comment posted by: Deb on 2005-06-08 00:56:53Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and 
Latest Answer : I am providing the answer which I have taken it from Informatica 7.1.1 manual,  Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and carry ...
After the load manager performs validations for the session, it creates the DTM process. The DTM process is the second process associated with the session run. The primary purpose of the DTM process is 
Latest Answer : Load manager and DTM are the components of Informatica server.  Load manager manages the load on the server by maintaining a queue of sessions and release the session based on first come and first serve. When the session is released from the load ...
Session - A Session Is A set of instructions that tells the Informatica Server How And When To Move Data From Sources To Targets. After creating the session, we can use either the server manager or the 
Latest Answer : Session is a set of instructions that relates to extraction, transformation and loading. Session is a task that relates to data acquisition. There are two types of taskReusable taskNon reusable taskBatch :Batch is a group of sessions, There are three ...
U can not create or import flat file defintion in to warehouse designer directly.Instead U must analyze the file in source analyzer,then drag it into the warehouse designer.When U drag the flat file source 
Latest Answer : While creating flatfiles manually, we drag and drop the structure from SQ if the structure we need is the same as of source, for this we need to check-in the source and then drag and drop it into the Flatfile, if not all the columns in the source will ...
U specify the target loadorder based on source qualifiers in a maping.If u have the multiple source qualifiers connected to the multiple targets,U can designatethe order in which informatica server loads 
Latest Answer : A target load order group is the collection of source qualifiers, transformations, and targets linked together in a mapping. ...
The Designer provides two mapping wizards to help you create mappings quickly and easily. Both wizards are designed to create mappings for loading and maintaining star schemas, a series of dimensions related 
Latest Answer : Inf designer :Mapping ->  wizards -->  1) Getting started -->Simple pass through mapping                                                                     -->Slowly ...
Simple Pass through maping : Loads a static fact or dimension table by inserting all rows. Use this mapping when you want to drop all existing data from your table before loading new data. Slowly Growing 
Latest Answer : 1. Simple Pass through2. Slowly Growing TargetCheers,Sithu ...
Load manager Process: Starts the session, creates the DTM process, and sends post-session email when the session completes. The DTM process. Creates threads to initialize the session, read, write, and 
Latest Answer : When the workflow start to run,Then the informatica server process startsTwo process:load manager process and DTM Process;The load manager process has the following tasks1. lock the workflow and read the properties of workflow2.create workflow log file3. ...
U can use command line arguments for a session or batch.This allows U to change the values of session parameters,and mapping parameters and maping variables. Parallel data processing: This feature is available 
Which tool U use to create and manage sessions and batches and to monitor and stop the informatica server?
Informatica server manager.  

 Sponsored Links

 
Related Articles

Breaking up XML into Relational Data

Breaking up XML into Relational Data While the preceding example shows how to construct an XML representation over relational data the example in this section illustrates how you can shred XML data back into relational data This reverse operation can be useful if your application works with relation
 

Querying Data with Oracle XQuery

Querying Data with Oracle XQuery Starting with Oracle Database 10g Release 2 you can take advantage of a full featured native XQuery engine integrated with the database With Oracle XQuery you can accomplish various tasks involved in developing PHP Oracle XML applications operating on any kind of dat
 

Retrieving XML Data

Retrieving XML DataTo retrieve XML data from an XMLType table you can use a SELECT SQL statement just as you would if you had to query a relational table For example to select the employee with the id set to 100 from the employees XMLType table discussed in the preceding section you might issue the
 

Using XMLType for Handling XML Data in the Database

Using XMLType for Handling XML Data in the Database Being an object type XMLType can not only be used to store XML data in the database but also to operate on that data via its built in methods Regardless of the storage model you choose XMLType provides a set of XML specific methods to operate on XM
 

Using Oracle Database for Storing, Modifying, and Retrieving XML Data

Using Oracle Database for Storing Modifying and Retrieving XML Data With Oracle XML DB you have various XML storage and XML processing options allowing you to achieve the required level of performance and scalability One of the most interesting things about Oracle XML DB is that it allows you to per
 

ODP.NET - Techniques to Improve Performance while Retrieving Data

ODP NET Techniques to Improve Performance while Retrieving Data Performance tuning is a great subject in Oracle Volumes of books would not be enough to cover every aspect of performance tuning in Oracle However in this section we will only discuss the fundamental performance techniques while working
 

ODP.NET - Populating a Dataset with a Single Data Table

ODP NET Populating a Dataset with a Single Data Table A dataset is simply a group of data tables These data tables can be identified with their own unique names within a dataset You can also add relations between data tables available in a dataset mosgoogle The following code gives you the details o
 

ODP.NET - Retrieving Typed Data

ODP NET Retrieving Typed Data While retrieving values from OracleDataReader we can extract information available in individual columns of a particular row either by using column ordinal position values or column names mosgoogle Retrieving Typed Data Using Ordinals ODP NET provides data specific enum
 

ODP.NET - Retrieving Data Using OracleDataReader

ODP NET Retrieving Data Using OracleDataReader OracleDataReader is simply a read only and forward only result set It works only if the database connection is open and it makes sure that the connection is open while you are retrieving data As the data that it retrieves is read only it is a bit faster
 

ODP.NET - Fundamental ODP.NET Classes to Retrieve Data

ODP NET Fundamental ODP NET Classes to Retrieve Data To retrieve data from an Oracle database using ODP NET we need to work with a few of the ODP NET classes At this point we will discuss the most fundamental classes available in ODP NET for retrieving data mosgoogle The following is the list of fun
 




About Us  |   Privacy Policy  |   Terms and Conditions  |   Contact  |   Site Map  |   Add Question  |   Propose Category  |   RSS Feeds  |   Articles Sitemap  |   Site Updates  |   Add Resource

Copyright © 2005 - 2008 GeekInterview.com. All Rights Reserved
Page copy protected against web site content infringement by Copyscape