Answer / jaimy chacko

just want to add something to the previous answer

Data sets are operating system files,
each referred to by a control file, which by
convention has the suffix .ds.
The control file points IBM InfoSphere DataStage
to a set of other files that carry the data.
The location of these data files is determined by the “resource disk” property in the configuration file used to run the job. Using data sets wisely can be key to good performance in a set of linked jobs.
You can also manage data sets independently of a job using the Data Set Management utility, available from
the IBM InfoSphere DataStage and QualityStage Designer or Director.

WebSphere DataStage can generate and name exported files, write them to their destination, and list the files it has generated in a file whose extension is,by convention,.fs.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. The amount of data that can be stored in each destination data file is limited by the characteristics of the file system and the amount of free disk space available.

Answer / jaimy chacko

Dataset and Fileset are almost the same .

Dataset is tool dependent and File Set is OS dependent(UNIX).
Dataset don't have any regulation of the amount of data that it has where as Fileset have limits to the data.

what is the difference between 7.1,7.5.2,8.1 versions in datastage?

3 Answers   IBM,

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Hi Friends, I have a input data like, class_id Marks 101 50 101 60 101 40 102 90 102 35 And i want my output data like class_id Marks Rank 101 50 2 101 60 1 101 40 3 102 90 1 102 35 2 how to do this in datastage?

8 Answers   Cognizant, HCL, TIAA CREF,

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Question 4) source target c1 c1 c2 c3 c2 c4 c4 c5 c3 c6 c7 c4 c5 c6 c7 Singal Source and Singal Target only subash,

3 Answers   TCS,

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Source has 2 columns: USA,NewYork INDIA,MUMBAI INDIA,DELHI UDS,CHICAGO INDIA,PUNE i want data in target like below: INDIA,MUMBAI1 INDIA,DELHI2 INDIA,PUNE3 USA,NEWYORK1 USA,CHICAGO2

0 Answers  

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In Sequential file, how can i split a column into two, and that column contains string datatype. For Example, i have column of string datatype as subedar khaja. Now i want get output as separately with subedar in one column and khaja in second column. How? Coula anybody, solve it?

2 Answers   Polaris,

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Define Merge?

0 Answers  

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Hi this madan, in data stage one file in Empno 12345678910 in a table, i want target is  Empno 1                                2 3 4 5 6 7 8 9 10                                                                                             

5 Answers   Tech Mahindra,

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Name the command line functions to import and export the DS jobs?

0 Answers  

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what is operator combinality in datastage?

1 Answers   TCS,

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Define meta stage?

0 Answers  

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Is possible to create skid in dim,fact tables?

0 Answers   NTT Data,

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at source level i have 40 columns,i want only 20 cols at target what r the various ways to get it

5 Answers   IBM,

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