File system vs portal performance

fyi... any thoughts on this one:
Problem statement: In our current application, all files are stored in the database as BLOBS, and when a regular user tries to retrieve a file using the application, the files get served from the database. The problem with this approach, is that when files get large > 1MB, since files get streamed from the DB to the application server and when the complete BLOB is retrieved, only then does the file get served by the application server to the user. Compare this performance to retrieving a file from a filesystem the performance is a 10-25X depending on the size of the file, the larger the file the better the performance from the filesystem
In the current Oracle 10g Portal installed, I have a URL pointing to a 10MB PDF document and the same file checked into the Portal using the Portal native document management system. I see a 20X improvement using the File System."
Thanks for any help.

hi,
you can use caching in portal to cache the page and the content. this makes it only slow for the first time a document is downloaded. downloading it from the database does not involve any special portal operations but uses default database functionality.
to cache the pages with the content edit the page properties and go to the main tab. you can decide if you want to cache on user level or on system level as well as if you want to cache the content in addition. if you cache the content as well the file is put on the file system cache of portal and is served out of there every time the page/item is requested depending on the cache settings. there are additional techniques to speed up this file system cache as well by usin a ram drive to load this into memory.
regards,
christian

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295324 ./j2ee/cluster/server0/apps/sap.com/irj/servlet_jsp/irj/root/portalapps
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300344 ./j2ee/cluster/server1/temp/webdynpro/temp/sap.com
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366616 ./SDM/root/origin/com.adobe/XMLFormService
366616 ./SDM/root/origin/com.adobe/XMLFormService/Adobe Systems
366616 ./SDM/root/origin/com.adobe/XMLFormService/Adobe Systems/0
383428 ./SDM/program
388232 ./SDM/root/origin/sap.com/tc
487640 ./j2ee/cluster/server1/temp/webdynpro
490564 ./j2ee/cluster/server1/temp
508248 ./j2ee/os_libs/adssap
519288 ./j2ee/cluster/server0/apps/sap.com/irj/servlet_jsp/irj/root/web-inf
567240 ./SDM/root/origin/com.adobe/PDFManipulation
567240 ./SDM/root/origin/com.adobe/PDFManipulation/Adobe Systems
567240 ./SDM/root/origin/com.adobe/PDFManipulation/Adobe Systems/0
645996 ./j2ee/cluster/server1/apps/sap.com/irj/servlet_jsp/irj/root
650780 ./j2ee/cluster/server1/apps/sap.com/irj
650780 ./j2ee/cluster/server1/apps/sap.com/irj/servlet_jsp
650780 ./j2ee/cluster/server1/apps/sap.com/irj/servlet_jsp/irj
723796 ./j2ee/os_libs
814652 ./j2ee/cluster/server0/apps/sap.com/irj/servlet_jsp/irj/root
819436 ./j2ee/cluster/server0/apps/sap.com/irj
819436 ./j2ee/cluster/server0/apps/sap.com/irj/servlet_jsp
819436 ./j2ee/cluster/server0/apps/sap.com/irj/servlet_jsp/irj
1248364 ./SDM/root/origin/com.adobe
1319004 ./j2ee/cluster/server1/apps/sap.com
1336304 ./j2ee/cluster/server1/apps
1470012 ./j2ee/cluster/server0/log/archive
1665496 ./j2ee/cluster/server1/log/archive
1681300 ./SDM/root/origin/sap.com
1730984 ./j2ee/cluster/server0/log
1856844 ./j2ee/cluster/server0/apps/sap.com
1878272 ./j2ee/cluster/server0/apps
1927368 ./j2ee/cluster/server1/log
2929664 ./SDM/root/origin
2931364 ./SDM/root
3314792 ./SDM
3881168 ./j2ee/cluster/server1
3943000 ./j2ee/cluster/server0
8094976 ./j2ee/cluster
9156032 ./j2ee
12878604 .
*****************end of out put
Regards
Edited by: sidharthmellam on Oct 27, 2009 4:15 AM

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Total Clusters :                  0x000000001bf08dff
Free Clusters :                  0x000000000c9c57c5
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Root-Directory = "
My Server\My Share", SecurityManager = W2kSecurityManager, ACL Manager Cache = ca_rsrc_acl, Windows Landscape System = "MySystem"
- Configuration of the W2KSecurityManager: I specified the DomainFile-setting as "/etc/companydomaincontrollers.txt"
and placed such a file in the KM with following setting: "My.Server.Domain=According IP Adress"
- In UME I carried out user mapping for index_service user and placed the above mentioned admin user into the user mapping.
Result: The indexing works fine, all fles are indexed. When I however try to carry out a user mapping for a "normal" portal user in the UME it doesn't work: The portal user has no access to the file system. (I used the same admin user for mapping... so it should work).
Any help is appreciated...
P.S. With portal super admin users I can however access the fle system repository, even without user mapping. But I think this is ok, because I read in one forum message that admin users have always access in general....

>
Frank Friedrich wrote:
> Hi Clemens,
>
> so the good think is that indexing is working and you can navigate with your admin portal user through the file system repository. In this case the most configuration settings must be correct.
>
> I am not quite sure regarding your System objects with the ID "MySystem". Do you have as well define an Alias Name for this System Object with the same name "MySystem" ? As well upper and lower letters are important.
>
> Because the reference is all the time the Alias name and not the ID or Name of your System object.
>
> Best regards
> Frank
Hi Frank,
thanks for your reply.
I have as well definied an Alias Name with exactly the same id. So this gives us following:
System landscape directory: KM Windows System with id="MySystem" and Alias="MySystem"
KM System Landscape: Windows System with id="MySystem"
In the created file system repository manager I also set "MySystem" for the Windows Landscape System parameter.
So I think that this should be correct (I also considered upper- and lowercase letters).
Maybe the probem lies in specifying the domain names? When I applied user mapping I always additionally specified the Windows domain name of the users, which is correct I think.
In the security manager configuration for the domain controllers (-> [http://help.sap.com/saphelp_nw04s/helpdata/en/a9/c54e9e09448d46b73d154e93d5e995/content.htm]) I however mapped the network domain of the file share server to the according IP adress. Maybe this is wrong?

File system vs portal performance

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