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Question
what are Lookup caches options? Including persistent caches.
 Question Submitted By :: ETL
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
There are two types of Lookup Cache options -

1. Dynamic cache.
2. Persistent cache

1. dynamic Cache - The Dynamic cache is a property of the
look up which if selected makes other ports of the same
record to be checked as Look up apart from the Look up port.

2. Persistent Cache - persistent cache is something like on
the first run the lookup table values gets into a cache and
is stored on the server's hard disk. Each time the run is
made the values would be looked up from this cache only.

Persistent cache is done only when the lookup has to be
made on same set of values each time.
 
Is This Answer Correct ?    2 Yes 1 No
Abhishek.x.upadhyay
 

 
 
 
Other ETL Interview Questions
 
  Question Asked @ Answers
 
Eliminating of duplicate records without using dynamic lookups   1
what is the difference between date cache and lindex cache?   1
what are Lookup caches options? Including persistent caches.   1
1. if lookup tr is giving poor performamence. what u do. 2. i have emp,dept table. i want output ename,empno,dname,max(sal). 3. can any one tell me project flow in real time scenario. please send me mail any queries and answers my mail id is yaparala@gmail.com iGate 2
WHY CANT WE SEE THE DATA IN DATASET IBM 1
what is the difference between OLTP database and data warehousing database?   4
When you have 2 servers in two different time zone and if you need to extract data from 1 server and load it in another server, how do you go about it? Best method to be used.   3
what is meant by drill through?(Mascot)   1
If you concatenate data from a normalizer transformation,the ports you concatenate cannot include OCCURS(T/F).   1
we have 1 source table containing 100 records. now we have to transfer first set of 1-10 (i.e1-10) records to one target table and another set of 1-10(11-20) records to other target table and continue like that till 100th record   2
how do u automate Extraction process?   1
Identifying the bottlenecks in various components of Informatica and resolving them.   2
 
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