Web Cache For Forms

Dear Sir/Madam,
What is the benefit for Oracle Forms when we use Oracle Web Cache ?
Best regards
Boris

Hi,
I have a question regarding to this topic, I'm using webcache with as a Load Balancer over 2 form instances. I'm testing the enviroment like this:
Origin Servers:
forms1.domain:7777 ping URL /forms90/f90servlet?ifcmd=status (the rest of the values are default)
forms2.domain:7777 ping URL /forms90/f90servlet?ifcmd=status (the rest of the values are default)
Site Definitions:
webcache.domain:7777
Site to Server Mappings:
Site: webcache.domain:7777
Server: forms1.domain:7777
forms2.domain:7777
When I go into forms and shutdown the OC4J on machine1 I realized that webcache is still showing the machine1 status UP, just until I shutdown HTTP_Server on machine1 webcache shows the status of this machine DOWN. What is the problem that if the OC4J is down and the ping URL points to the OC4J why webcache still shows the machine UP?
Thanks.

Similar Messages

(urgent) web cache for forms 10g

Hi all,
We have application running on oracle 10g Aps resently migrated and we got couple of freequently used forms by default my webcache is on but i dont know how can i specifialy say that thease forms to be cached like if i see my webcache page i could see some of the gifs had cached but no specific forms how can i do this.
I shall be highly be obliged if one can clear my queries in the forum may wish to add to 2cents to my infinetly minimal knowledge of webcache.

Not really true. You could setup a rule to cache the JAR files for Forms. Additionally, you could cache the GIF files accessed by the applet, though it would be better to move those image files into a JAR file. Why?...
If you use a static HTML file to call your forms, that would be cached by default.
Because the client JVM caches the files. You can view this in the Java Console of JInitiator or your Java Plug-in. Additionally, you can see when the image files are served from the JAR files by looking in the Java Console as well. Change to level 5 trace in the Java Console window and look for GIF files with a path that includes http://server/forms/jave/filename.jar!/filename.gif. Notice the ! symbol. That shows a client JAR cache hit for that GIF file. Served locally, doesn't even make it to Web Cache!
The rest of the communication really isn't cacheable. Communication goes from the Applet (Client JVM) through Web Cache to the HTTP Server to the OC4J_BI_Forms container (OC4J JVM) that runs the Forms listener servlet which talks directly with the Forms Server runtime process running as a Unix process (C, not Java).
So, the only communication that goes between the applet and the Appliction Server is just the messages between the applet and Forms Server process telling the applet how to refresh the display on the client's applet screen and telling the Forms Server process what to do with the data and code being run. This communication is optimized by using message diffs, so it is relatively efficient. But an application not optimized for the web might use chatty functionality that slows things down a bit.
Anyway, xhomet is essentially right in that Web Cache doesn't do much of any significance besides load balancing. Caching JAR files might make sense for you though if you have a lot of users all getting this JAR or an updated JAR at the same time.
Hopefully you foundthis interesting.
Steve

Web Cache for 10.1.3 ??

The Disk (CD) #1 Install for 10.1.3 contains OC4J, OHS and the Admin Console, but no Web Cache. Is the Web Cache for 10.1.3 available on one of the supplemental disks (CD images)? Does a 10.1.3 version of the WebCache exist?

Hi David,
As far as I know, 10.1.3 doesn't include the usual Web Cache component. But it does have Web Caching functionality in a different form called the ADF Faces Cache, which's Web Cache as part of the ADF Framework of Oracle. For more info, refer here:
http://www.oracle.com/technology/products/ias/web_cache/afc/index.html
Hope this helps.
Regards,
Priyanka GES

Oracle9iAS Web Cache for PL/SQL ????????

Hi,
I installed Oracle9iAS Web Cache.
I could cache any web site which write by asp, jsb,... but I can not cache web site http://www.vnn.vn because it write by pl/sql.
How do I cache web site which write by pl/sql, ex that web site.
Please, give me email follow address : [email protected]
Thanks
Nguyen Tien Dat

You should have no problem using Web Cache to accelerate a PL/SQL driven site. Any site that delivers content via HTTP is a good candidate for Web Cache. Try downloading the standalone Web Cache software from OTN, and be sure to read the manual to learn about how it works and how to configure it.

Web services for forms 10g

Hi, Can anybody explain how to use web services in forms 10g. I have a wsdl url with me which I need to call. I also heard that I can use utl_http and utl_url package. Anbody knows what it is. So basically there are two ways to call web services into the form, either use Jdeveloper to create a stub and import it into the forms or I can use the utl_http and utl_url package. Is that right?
Please advise in details. All this is confusing.
Thanks.

http://groundside.com/blog/GrantRonald?title=calling_a_web_service_from_oracle_forms__2&more=1&c=1&tb=1&pb=1 tells you exactly what to do.

FRM-92101: Load Balancing Forms 10g with Web Cache

Hi,
IÂ´m having some problems with Oracle Forms and Webcache 10g and I was wondering if you
could help.
Machines: (Pentium IV 2.6 GHz; 2GB RAM; 80GB HD)
A. Red Hat Linux AS 2.1
Oracle AS 10g - Infrastructure Installation
B. Windows 2000 Server - Service Pack 4
Oracle AS 10g - BI and Forms Installation (Using Infrastructure on machine A)
C. Windows 2000 Server - Service Pack 4
Oracle AS 10g - BI and Forms Installation (Using Infrastructure on machine A)
I didnÂ´t apply any Patchsets of Oracle AS 10g. My current version is 9.0.4.0 .
Goal:
Use Oracle Webcache 10g on machine B for Load Balancing an Oracle Forms Application
on machines B and C.
Facts:
The Oracle AS 10g installation on the 3 machines was made without problems.
The Forms Applications are running without problems on both Forms servers in machine B and C.
Symptoms:
IÂ´m getting the following error when I try to acces the forms application through Webcache:
FRM-92101: There was a failure in the forms server during startup.
This could happen due to invalid configuration.
Please look in the web-server log file for details.
But, this error happens ONLY when BOTH OC4J_BI_Forms instances (machines B and C) are
running.
When just one of the OC4J_BI_Forms is running everything works fine.
Webcache Configuration:
IÂ´ve followed Metalink note 207668.1: Configuring Web Cache as a Load Balancer for Application Servers
step by step to make the configuration of the following components:
1. Configuration of the origin servers
2. Configuration of Site definitions
3. Configuration of Site to server mapping
After that, IÂ´ve follwed the Metalink note 229900.1: Integrating and using Web Cache with Forms 9i for Load Balancing
step by step to make the configuration of the following components:
4. Session Binding
Then I try to test the Load Balancing and I got the error FRM-92101 when both OC4J_BI_Forms
instance were running.
IÂ´ve searched Metalink and found note 268830.1: Webcache Won't Load Balance 2 Forms Instances.
Following the note instructions I did the following changes:
Added these lines at the end of HTTPD.conf (machine B):
CookieTracking On
CookieName myformscookie1
Added these lines at the end of HTTPD.conf (machine C):
CookieTracking On
CookieName myformscookie2
In Webcache configuration:
IÂ´ve Changed the default session binding from JSESSIONID to "ANY SET COOKIE" for the
site's session binding.
But even after these changes IÂ´m getting FRM-92101 error on the same conditions.
How can I solve this problem ?
Thank you in advance.
Marcus Santos.
([email protected])

Just ran into this problem last Tuesday, Nov.30 and applied the changes today.
My configuration is similar to yours: 9.0.4 web cache on machine A, 9.0.4 10gAS forms and reports standalone on machine B and C (not a cluster, no infra).
I appended the Cookie lines you mentioned in httpd.conf located in $ORACLE_HOME/Apache/Apache/conf in both machines B and C.
One important thing you may have missed. After changing httpd.conf in each 9iAS instance, you need to make the change known to dcmctl so issue:
dcmctl updateConfig -ct ohs
Then do the following for each 9iAS instance and it should be ready for webcache:
dcmctl stop
dcmctl start
Setup Any-set-Cookie in webcache instead of JSESSIONID and the whole thing should now work. You can run a form through machine A which will load balance to either machine B or C (which can both be up). Then, try shutting down 9iAS on machine B or C and run a form again. They now all work.
HTH,
Raffy

Oracle Web Cache 9.0.4 for Windows

Hello, All!
Please, can any one help me when be released Oracle Web Cache 10g for Win platform?
Thanks.
Best regards, Juri.

Juri,
Very very soon. Stay tuned. We'll post a standalone Web Cache for Windows on OTN as soon as it is available.
Regards,
Christine

Recommended Hardware, OS for Web Cache

We are planning to implement web cache for our 9i AS (Sun Solaris) environment. The Web cache server will be running on its own box. Also, we would like to perform load balance on our web cache tier down the road.
Keeping all this in mind. Could someone provide us the recommended hardware (/w cofiguration) and OS for implementing web cache. Thanks,

Web Cache is designed to run on low-cost commodity hardware. You need at most 2 CPUs (the faster the better) to run
a Web Cache instance. A single CPU machine is OK, too -- again, the faster the better.
For the money, you can't beat a 2x933 Linux box.
Then there's memory. Most 32-bit OSs provide 2GB of addressable memory. You want to make sure there's enough
memory to cache all the content you want to cache. Usually, 2GB is more than enough. 500MB - 1GB is usually sufficient.
Depends on your app.
In a few days, I will post a paper on http://otn.oracle.com/products/ias/web_cache/
that covers the best practices for sizing and performance of Web Cache 2.0.0.x (9iAS 1.0.2.2). This will help you with
sizing.
The network may also be a consideration for performance, as the paper mentioned above discusses.
Readers shoud note that the information in this standalone paper has been moved to the Performance and Tuning Guide
for 9iAS release 2 (version 9.0.2) which is due out shortly. Some of the information will be different in Web Cache 9.0.2 than
it was in Web Cache 2.0.0.x.

Is it possible to enable Web Cache gzip compression for 9iAS Disco Viewer?

Hi,
Sorry for repeating this question. But it's very urgent and we don't have any idea yet how to solve / work around it:
To keep it short: Is it possible to use Web Cache gzip compression for pages rendered by 9iAS Discoverer Viewer???
Our scenario: We have some Discoverer Worksheets which we want to access by ISDN dial in (64 kbit/sec). An average page needs 2 minutes only for sending the html/javascript output rendered by Disco Viewer to the client browser.
To speed up the response time when users use this slow connection, we want to activate Web Cache gzip compression.
The problem: But even when we enable Web Cache for Discoverer (configuration.xml and Web Cache rules), Web Cache doesn't compress pages generated by Discoverer Viewer. We found out that the generated responses contain the "content-disposition" HTTP-Header entry. Are we correct that this is the reason why there is no gzip compression? AND DOES ANYONE KNOW A WORKAROUND (p.e. configure Disco not to add the content-disposition http header)???
Best regards,
Matthias Scherer

Matthias,
Have you raised this as a TAR with Oracle Support? If you've got a specific question, and you need a definitive answer, raising a TAR is the best way to proceed.
regards
Mark Rittman

Web Cache 2.0.0.2.0 Available

In case you haven't already noticed, Web Cache 2.0.0.2.0 is
available for download on OTN. There is also an additional patch
set or two available on Metalink.

I can't figure out where is WebCache 2.0.0.2.0 stand alone
download.
I only found these links:
Oracle9iAS Web Cache for Sun SPARC Solaris
webcache20020_solaris.zip - Note: requires prior installation of
Web Cache 2.0.0.1.0 - see the readme. (10,022,460 bytes)
webcache20010solaris.tar.gz - (64,298 kb) - Note: This download
is Oracle9iAS Web Cache (v2.0.0.1.0), a later version than is
currently shipping in Oracle9iAS v1.0.2.2.
esikit2.zip - (146 kb)
The latest release of Oracle9i Application Server includes
support for ESI (Edge Side Includes) technology that will improve
the response time and scalability of even the most dynamic Web
sites.
Or is necesary to download "Oracle9iAS v1.0.2.2.1 Core for Sun
SPARC Solaris"
Best regards, Marcelo.

Discoverer Servlet with Web Cache gzip Compression

Hi,
we have some Discoverer Worksheets which we want to access by ISDN dial in (64 kbit/sec). To speed up the response time when users use this slow connection, we want to activate Web Cache gzip compression.
But even when we enable Web Cache for Discoverer (configuration.xml), Web Cache don't compress pages generated by Discoverer Viewer. We found out that the generated responses contain the "content-disposition" HTTP-Header entry. Are we correct that this is the reason why there is no gzip compression? AND DOES ANYONE KNOW A WORKAROUND???
Best regards,
Matthias Scherer

When you set the caching rules, you can also specify whether or not you want the pages to be compressed. Web Cache compresses html pages and relies on the accept-encoding: gzip from the client header to determine whether or not to send the content compressed.

OTN Forums uses ESI and Web Cache

For the curious, the OTN Forums application uses Web Cache 9.0.2 and ESI -- I think since April.
We'll be preparing some case studies on Oracle's use of Web Cache for various customer-facing sites
over the next couple of months, so I'll be able to share more info then.

The Discoverer development team is currently making a few adjustments to Discoverer Viewer so it can work seamlessly with WebCache. You may see this functionality in 4.1.39, otherwise it will be in 9iAS release 2.
null

Web cache documentation

Hi everyone,
I've installed Oracle9i Application Server(v1.0.2.2.2) for Windows NT/2000, on two single nodes with the repository on a Windows 2000 Cluster.
I would like to configure Web Cache for load balancing, where is it possible to find documentation about Administering Web Cache, considering that on OTN there is the one related to the last release of OAS?
Regards
Fabrizio

You can use webcache 902 with 9iAS r1, the later version of webcache is a preferrable option and works just fine.
-JP

Is it possible to enable Web Cache gzip compression with 9iAS Disco Viewer?

Hi,
Sorry for repeating this question. But it's very urgent and we don't have any idea yet how to solve / work around it:
To keep it short: Is it possible to use Web Cache gzip compression for pages rendered by 9iAS Discoverer Viewer???
Our scenario: We have some Discoverer Worksheets which we want to access by ISDN dial in (64 kbit/sec). An average page needs 2 minutes only for sending the html/javascript output rendered by Disco Viewer to the client browser.
To speed up the response time when users use this slow connection, we want to activate Web Cache gzip compression.
The problem: But even when we enable Web Cache for Discoverer (configuration.xml and Web Cache rules), Web Cache doesn't compress pages generated by Discoverer Viewer. We found out that the generated responses contain the "content-disposition" HTTP-Header entry. Are we correct that this is the reason why there is no gzip compression? AND DOES ANYONE KNOW A WORKAROUND (p.e. configure Disco not to add the content-disposition http header)???
Best regards,
Matthias Scherer

When you set the caching rules, you can also specify whether or not you want the pages to be compressed. Web Cache compresses html pages and relies on the accept-encoding: gzip from the client header to determine whether or not to send the content compressed.

Using Web Cache to Load balance Forms Server application.

Hello,
I apologize for cross posting this question in the Forms and Caching Services forum. But I thought my question will have a better chance.
I have read that it's possible to use Oracle Web Cache as a software load balancer between multiple Application Servers.
We are running Oracle9iAS R1.0.2.2.2a, with Forms/Reports6i servers on 2 Win2k boxes i.e our Forms6i application is deployed on two seperate boxes in two distinct locations. Users at each location, use their respective App Server url.
Since the application is the same i.e. Forms6i code/fmx is the same for both locations, I am looking into loadbalancing and failover capability that Web Cache might be able to provide.
I AM ONLY LOOKING AT THE LOADBALANCING & FAILOVER capabilities and NOT caching.
So basically all users from both locations will point their browser to this Web Cache and the Web Cache will direct each connection to either of the two boxes. So, if either of the boxes dies, Web Cache will divert the requests to the other box.
My concern is whether Web Cache supports this for the Forms requests that it will receive from the users. We are using Servlet Deployment of Forms, so technically, all communication is going though the HTTPD.
Has anyone done this or has any ideas as to whether it's going to work or not? Oracle's FAQ insists that Forms is not supported. But I want to make sure that even loadbalancing is not supported. And if not supported then is there any other solution.
Any comments appreciated.
Thanks,
Manish

Using Web Cache to load balance servlet-based Forms (6i and 9i) is unofficially supported. I say "unofficially" because we have actual customers doing it and getting support, but the 2 development teams (Forms and Web Cache) haven't actually done any integration testing of this sort of configuration yet. For your case, please contact your Support rep and ask what was done to use Web Cache as a load balancer for Forms6i at METRO in Germany. The Forms product managemment team is writing up a white paper to describe how to do it, but until then, you'll need to go through Support. Please contact me if you want more information.

Web Cache For Forms

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