When we enable pushdown optimization technique, two options
will be enabled (use view,..). Can anyone tell me how these
two options will work ?
When do we need to go for pushdown optimization technique ?
Answers were Sorted based on User's Feedback
Answer / parikhita prusty
MY dear friend when we used pushdown optimization it
increases the session performanse.
The integration service analyses mapping transformations and
determine which t?r logic to be sent to the target and
source database.
The integration servicetranslates the T/r logic into sql and
sends it into the database for processing.
The pushdown optimization is configured in 3 ways
i) Source side PDO
ii)Target side PDO
iii)Full side PDO(Both source and target side)
If anybody have some doubts u can ask in my mail id
parikhita2000@gmail.com
Regards
Parikhita
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / priyank
Hi,
For Pushdown optimization, we use
1. Temporary View for the below scenarios:
a. When the SQ or look up t/f contain a SQL override.
b. When the look up t/f is used with Filter t/f.
c. When an unconnected look up is used.
2. Temporary Sequence is used for the below scenario:
a. When a Sequence generator t.f is used in the mapping.
When Source side PDO is selected, the IS traverses from
Source side to the Target side till it comes across a
transformation whose logic cannot be pushed to the
database. If the logic for all the transformations can be
pushed to the database, still the target update override
query will be executed on the target database as logic of
transformations are pushed to the database whcih includes
the SQ query.
As per me, the push down optimizations are mainly used for
performance enhancement of the workflows as there are some
logics which can be exected faster on the database compared
to Informatica.
Please let me know all your comments if any on the above.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / manojkumar
Thanks you so much parikhita.
Can you give me the exact two options(use view,..) which
will enabled when we select pod and how these options will
work?
When I select pod on source side, what about target insert
or update query ? will it be pushed to target db? Or only
select query will be pushed to source db ?
and when do we need to go for pushdown optimization
technique ? ofcourse it increses the performance. But at
what situation or circumstances we need to go for pod ?
Is This Answer Correct ? | 0 Yes | 0 No |
what are the reusable tasks in informatica ?
11 Answers CTS, HP, IBM, TCS,
Why the UNION TRANSFERMATION is an Active TRANSFERMATION
Can we use parameters of parameter file in presession command
How can you join 3 tables? Why cant you use a single Joiner to join 3 tables.
how tokens will generate?
There are 4 flat files with number of records as indicated below. Which files should be picked first for joining using joiners so as to get best performance. File A - 1000 records File B - 100 records File c - 10000 records File D - 10 records Please explain. Thanks and Regards,
what are the types of Data warehousing ?
difference between repository database and repository service?
One of the optimizing technique to improve the session performance is push down optimization,by using push down optimization we push as much as transformation logic to source/target database,but this degrades the d/b performance,how to overcome this?
MY SOURCE IS LIKE THIS VENKATESH,101||RAJESH,102||SIVA,103||SWATHI,104 MY REQUIRMENT IS NAME ID VENKATESH 101 RAJESH 102 SIVA 103 SWATHI 104 PLEASE PROVIDE ME THE SOLUTION
normalizer transformation
task is running successfully but data is not loded why?