What is Pushdown Optimization in informatica

Hey Satish, Adding to Soundarya, you can do Pushdown optimization at source end also. What I've seen the real time projects is Push down optimization is more useful in Re-engineering projects/Performace Tuning projects. That means as the existing logic can be modified to push to Database level which improves much performace. As well as, In the new startup projects also,we can keep all the logic in informatica. But, actually we make it to run on DB using pushdown optimization. Pushdown optimization is 3 types. 1. Source side pushdown optimization2. Target side pushdown optimization3. Full pushdown optimization. However, Few transformations does not support pushdown optimization like Rank, Java, Normalizer,..etc. In this case. we can select either source/target side optimization only. And, That too optimization can be applied only either before/after the pushdown optimization non-allowed transformation. The main disadvantage of pushdown optimization is we can not track the log for the logic which we pushed to database. ThanksNaresh.

You can look into following examples, Satish. https://community.informatica.com/solutions/pushdown_update_strategy_updatehttps://community.informatica.com/solutions/mapping_full_pushdown_optimizationhttps://community.informatica.com/solutions/mapping_partial_pushdown_optimizationhttps://community.informatica.com/solutions/pushdown_router_transformationhttps://community.informatica.com/solutions/pushdown_connected_lkphttps://community.informatica.com/solutions/pushdown_update_ins_upd_delhttps://community.informatica.com/solutions/pushdown_update_strategy_delete

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Hi phani kumarDurusoju ,
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Performance tuning
http://www.sapbrainsonline.com/ARTICLES/TECHNICAL/optimization/optimization.html
http://www.geocities.com/SiliconValley/Grid/4858/sap/ABAPCode/Optimize.htm
http://www.abapmaster.com/cgi-bin/SAP-ABAP-performance-tuning.cgi
http://abapcode.blogspot.com/2007/05/abap-performance-factor.html
cheers!
gyanaraj
****Pls reward points if u find this helpful

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Old or Incorrect Data
Verizon's description of the optimization techniques explains that many common file types, including web pages, text files, images, and video files will be cached. This means that when a device visits a web page, it may be loading the cached copy from Verizon. This means that the user may be viewing a copy of the web site that is older than what the web site is currently serving. Additionally, if some files in the cache for a single web site were added at different times, such as CSS files or images relative to some of the web pages containing them, this may even cause web pages to render incorrectly.
It is true that many users already experience caching because many devices and nearly all computer browsers have a personal cache. However, the user is in control of the browser cache. The user can click "reload" in the browser to bypass it, clear the cache at any time, or change the caching options. There is no indication with Verizon's optimization that the user will have any control over caching, or even knowledge as to whether a particular web page is cached.
Potential Security and Privacy Violations
The nature of the security or privacy violations that might occur depends on how carefully Verizon has implemented optimization. But as an example of the risk, look at what happened with Google Web Accelerator. Google Web Accelerator was a now-discontinued product that users installed as add-ons to their browsers which used centralized caches stored on Google's servers to speed up web requests. However, some users found that on web sites where they logged on, they were served personalized pages that actually belonged to different users, containing their private data. This is because Google's caching technology was initially unable to distinguish between public and private pages, and different people received pages that were cached by other users. This can be fixed or prevented with very careful engineering, but caching adds a big level of risk that these type of privacy problems will occur.
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Questions about Tethering and Different Devices
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Only optimizing or caching video files, instead of more frequent file types such as web pages, text files, and image files.
Disabling optimization when tethering or using a Wi-Fi personal hotspot.
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Verizon, if you are reading, thank you for considering these concerns.

A very well written and thought out article. And, you're absolutely right - this "optimization" is exactly the reason Verizon is fighting the new net neutrality rules. Of course, Verizon itself (and it's most ardent supporters on the forums) will fail to see the irony of requiring users to obtain an "unlimited" data plan, then complaining about data usage and trying to limit it artificially. It's like a hotel renting you a room for a week, then complaining you stayed 7 days.
Of course, it was all part of the plan to begin with - people weren't buying the data plans (because they were such a poor value), so the decision was made to start requiring them. To make it more palatable, they called the plans "unlimited" (even though at one point unlimited meant limited to 5GB, but this was later dropped). Then, once the idea of mandatory data settles in, implement data caps with overages, which is what they were shooting for all along. ATT has already leapt, Verizon has said they will, too.

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Edited by: Mohan Kumar on Jul 9, 2008 6:51 AM

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What is Pushdown Optimization in informatica

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