what is the exact difference between dataset and fileset in datastage

3/12/2015 what is the exact difference between dataset and fileset in datastage?

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Questionwhat is the exact difference between dataset and fileset in datastage?

Question Submitted By :: Data Stage

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Answer# 1

DataSet:1. The fundamental concept of the Orchestrate framework is the Data Set. Data Sets are the inputs and outputs of Orchestrate operators.2. As a concept a Data Set is like a database table, in so far as it is a collection of identically-defined rows. It is the only structure on which Orchestrate operators operate. Each operator( i.e., stage) accepts input from one Data Set and sends its output to another Data Set.3. A Data Set exists on all the processing nodes defined for the job that is currently processing it. That subset of rows in a Data Set that are located on a single processing node is referred to as a "partition" of the Data Set. Technically, a partition is a subset of the rows in a Data Set (or File Set) earmarked for processing on the same processing node.4. A control file is associated with each data set. The control file contains the record schema that defines the row structure (effectively its column definitions).5. Within a Data Set data are stored in internal, or machine-compatible format.

FileSet:

Subhash



1. It allows you to read data from or write data to a file set. 2. The stage can have a single input link, a single output link and a single reject link. 3. It only executes in parallel mode. 4. The data files and the file that lists them are called a file set. This capability is useful because some operating systems impose a 2 GB limit on the size of a file and you need to distribute files among nodes to prevent overruns. 5. Only advantage of using fileset over a sequential file is "it preserves partitioning scheme"

A dataset is a file/stage where the data can be read directly by the DataStage, whereas a file set needs to be converted into DataStage readable format (which happens internally).

In simple words the data from the DataSet can be read faster than from FileSet.

Is This Answer Correct ? 9 Yes 2 No

Answer# 2

1) dataset in native format so it can view the data onlyinternally(datastage) where as fileset is in binary format so data canbe view in any where which is convert from binary to humanunderstandable language.

2) dataset dont support reject link where as fileset support reject link.

3) dataset is copy operator fileset is import and export operator.

Peddolla




Answer# 3

In DataSet, data is stored in Binary format.In fileSet, data is stored in the form of text.That's it...


kavi

Answer# 4

Dataset operate the file local server and also its support upto 2 GB DataFile set operates the file local and remote servers and also its support unlimited Data


lokesh butra

Answer# 5

Dataset is same as that of fileset only difference is rejectlink and external use.

prakash

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what is the exact difference between dataset and fileset in datastage

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