The main difference is that DataStage has gone from being a standalone ETL tool to part of the Information Server. So you cannot install DataStage without including the Metadata Server and components that go with it.

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i have created a job1 in DataStage 7.5 and after some time i have migrated to DataStage 8.0.


Now my question is, will the job1 runs in DataStage 8.0 setup without doing any migration to the job1 or we need to do some migration to the job1 or we need to create a new job?

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Jobs created in DS 7.5 should migrate to 8.0 without you having to change the job design. You can do a DSX export of a job from the 7.5 system, import it on 8.0, compile it and run it, and assuming the rest of the environment it relies on is still set up, it should run without changes to the design. It is also possible to do an "in-place" upgrade of DS 7.5 projects to the 8.0 environment, by-passing the DSX export/import process...though I think in general it would be safer to run the 2 systems side-by-side if you can, until you are convinced that the 8.0 environment is running smoothly.

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There are lot of diffference between datastage 8. and 7.5  and i listed some points below  1.To implement scd we have seperate stage(SCD stage)  2.we dont have client manager tool in vversion 8,its  incorporated with Designer itself.  3.There is no need of hardcoding the parameters for every  job and we have a option called Parameter set.if we create  the parameter set,we can call the parameter set for whole  project or job,sequence..
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the main difference is 7.5 versions is a file system and 8.0 version has a database system under. There is no concept of Universe in 8 version onwards ..
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The main difference between DS 7.5 & 8x is in DS 7.5x the repository was Files and in  DS 8x the repository is DataBase
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1.The look range introduced in 8.0 2.The manager is combined with Designer in 8.0 3.Parameter Set was introduced 4.Scd's are introduced in 8.0 5.Changes in Surrogate key in 8.0
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• New WebSphere Metadata Server Foundation to better integrate the products across IBM Information Server and support the enterprise; with new meta data services DataStage provides graphical impact analysis and job diff right within the DataStage and QualityStage Designer • Completely Integrated Data Quality to ensure the most accurate, complete information is made available • Significant ease-of-use enhancements to improve usability and productivity • New and Expanded Transformation Functionality to aid DataStage users in job design • Continued focus on Performance and Throughput Improvements while providing detailed performance analysis and system resource estimation • Connectivity improvements, including the next generation of connectors • Common and Enhanced Installation, Configuration, Administration and Reporting across IBM Information Server • General Enhancements related to specific customer technical support requests • Migration, Upgrade, and Platform Support