What is the difference between session and task in Informatica?
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What is the difference between session and task in Informatica?
When we create task there will be drop down which task should be created. A session is a type of task, similar to other tasks available in the Workflow Manager. A session is a set of instructions that tells the Integration Service how and when to move data from sources to targets.
What is a command task in Informatica?
Command task in informatica is used to run the shell / unix commands during the workflow. You can specify unix commands in the command task to remove rejected files, ftp files, creating files etc.
How many types of tasks are there in Informatica?
You can create three types of reusable tasks in task developer.
- Command task.
- Session task.
- Email task.
What is assignment task Informatica?
An Assignment task assigns a value to a user-defined workflow variable. When you create a user-defined workflow variable, you enter an initial value. The Data Integration Service uses the initial value of the variable when the workflow starts.
Can we generate surrogate key in Informatica?
Surrogate keys are used to store history and they are generated using sequence generator . Also you can version the records using sequence no using look up and expression transformation.
What is session and workflow in Informatica?
A session is a set of instructions that tells the Integration Service how to move data from sources to targets. A session is a task, similar to other tasks available in the Workflow Manager. You create a session for each mapping that you want the Integration Service to run.
What is workflow in Informatica?
A Workflow in Informatica is a set of multiple tasks connected with start task link and triggers the proper sequence to execute a process. When a workflow in Informatica is executed, it triggers a start task and other tasks connected in the workflow.
What is difference between stop and abort in Informatica?
When you say “Stop” – Informatica Server waits for completing the Server Processes that are going to finish before going to stop the workflow. When you say “Abort” – Informatica Server going to stop the workflow immediately irrespective of the Server Processes are going to finish or not.
What is the difference between mapplet and mapping?
An Informatica Mapplet is a reusable object that comprises a set of transformations that can be used in multiple maps….Do Mapplet and Mapping do the same?
| Mapplets | Mapping |
|---|---|
| The transformations in mapplets can be reused. | The transformations in mapping cannot be reused. |
What is the difference between surrogate key and primary key?
A surrogate key is any column or set of columns that can be declared as the primary key instead of a “real” or natural key. Sometimes there can be several natural keys that could be declared as the primary key, and these are all called candidate keys. So a surrogate is a candidate key.
What is repository in Informatica?
The repository consists of database tables that store metadata. Metadata describes different types of objects, such as mappings and transformations, that you can create or modify using the PowerCenter Client tools. The Integration Service uses repository objects to extract, transform, and load data.
What is the difference between Worklet and workflow in Informatica?
A workflow is a set of instruction on how to execute tasks such as sessions (mappings), sending email, os commands (shell/batch) etc. A worklet is a set of instructions that can be reused in several workflow.
What is the difference between bulk and normal load?
The main difference between normal and bulk load is, in normal load Informatica repository service create logs and in bulk load log is not being created. That is the reason bulk load loads the data fast and if anything goes wrong the data can not be recovered.
What is difference between connected and UnConnected lookups in Informatica?
Connected lookup receives input values directly from mapping pipeline, whereas UnConnected lookup receives values from the lookup expression from another transformation. A mapping in Informatica may contain Source, Transformations and Targets connected together are considered as a pipeline.
What is the difference between bulk and normal load in Informatica?
