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Recent Questions

  • Which transformation should we use to normalize the COBOL and relational sources? view answer
  • Difference between static cache and dynamic cache? view answer
  • What are the join types in joiner transformation? view answer
  • In which condtions we can not use joiner transformation(Limitaions of joiner transformation)? view answer
  • What is the look up transformation? view answer
  • What are the diffrence between joiner transformation and source qualifier transformation? view answer
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  • How can you improve session performance in aggregator transformation? view answer
  • Can you use the maping parameters or variables created in one maping into any other reusable transformation? view answer
  • What is meant by lookup caches? view answer
  • What is source qualifier transformation? view answer
  • How the informatica server increases the session performance through partitioning the source? view answer
  • What are the settiings that you use to cofigure the joiner transformation? view answer
  • What are the rank caches? view answer
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  • What is aggregate cache in aggregator transforamtion? view answer
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  • What are the types of lookup? view answer
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  • Can you access a repository created in previous version of informatica? view answer
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  • Name some measures in your fact table? view answer
  • How many dimension tables did you had in your project and name some dimensions (columns)? view answer
  • How many Fact and Dimension tables are there in your project? view answer
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  • What is the daily data volume (in GB/records)? What is the size of the data extracted in the extraction process? view answer
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  • Under what circumstance can a target definition are edited from the mapping designer. Within the mapping where that target definition is being used? view answer
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  • If u r source is flat file with delimited operator.when next time u want change that delimited operator where u can make? view answer
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  • Difference between next value and current value ports in sequence generator? view answer
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  • How will u find whether your mapping is correct or not without connecting session? view answer
  • If you are using aggregator transformation in your mapping at that time your source contain dimension or fact? view answer
  • My input is oracle and my target is flat file shall I load it? How? view answer
  • for a session, can I use 3 mappings? view answer
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  • What is the difference between connected lookup and unconnected lookup? view answer
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  • I have the Administer Repository Privilege, but I cannot access a repository using the Repository Manager. view answer
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  • I do not want a user group to create or edit sessions and batches, but I need them to access the Server Manager to stop the Informatica Server. view answer
  • I created a new group and removed the Browse Repository privilege from the group. Why does every user in the group still have that privilege? view answer
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  • What are different kinds of repository objects? And what it will contain? view answer
  • What is a repository? view answer
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  • 1. What is a Data warehouse? view answer

!!! Informatica Frequently Asked Questions !!!

What are the rank caches?

SCJP 1.5/1.6 Exam Kit

!!!Answer!!!- From Technical Expert

the informatica server stores group information in an index catche and row data in data catche

when the server runs a session with a Rank transformation, it compares an input row with rows with rows in data cache. If the input row out-ranks a stored row,the Informatica server replaces the stored row with the input row.

During the session ,the informatica server compares an inout row with rows in the datacache. If the input row out-ranks a stored row, the informatica server replaces the stored row with the input row. The informatica server stores group information in an index cache and row data in a data cache.

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