Cache and Load Balancing with Oracle APEX Listener

Hi,
I intend to use only HTTP access.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Hi,
I think this question is best asked in the APEX Listener forum:
ORDS, SODA & JSON in the Database
Kind regards
Sandro

Similar Messages

Cache and Load Balancing for Oracle APEX Listener

Hi,
I intend to use only HTTP access.
The database I use is Oracle11gR2 SE 32bit.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Error. To be closed.

Cache and Load Balancing for the Oracle APEX Listener

Hi,
I intend to use only HTTP access.
My database is Oracle 11gR2, SE, 32 bit.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Error. To be closed.

ACE 4710 and load balancing with sticky cookie

Configuring load balancing with SSL termination and stickiness for a couple of citrix xenapp servers. I'm doing a source-NAT as the ACE resides in the DMZ and these particular servers reside on the inside arm of the firewall. The ACE is in bridged mode to load balance web servers that reside in the DMZ. Everything seems to work just fine, but the cookie stickiness does not seem to be working.

Hi David,
As you may know, using Wireshark to look at an HTTPS capture is only useful if you've installed the server SSL key.This is why I find it easier to use something like LiveHTTPHeaders or HTTPWatch.
When using cookie-insert, the ACE will not create any dynamic cookie entries. It will simply create one static entry for each rserver with a cookie value, such as R3911631338, and any client that gets load balanced to that rserver will receive a cookie with that value. So what you see there is what is expected.
You are correct in that when using location cookies that the server supplies, the ACE will create a dynamic entry when it sees the server response with the cookie. The cookie is included in the server's response, and the ACE will look for the value as configured. The cookie will also be sent to the client. If the cookie is not in the server's first response, you will need enable persistence-rebalance so that it will look in subsequent server responses. If the browser opens new connections with that cookie, then the ACE will stick to the same server.
My suggestion would be to get sticky working with cookie-insert first. Then if that meets your needs, go with that permanently. If you need to use server cookies, then once cookie insert is working, migrate your sticky to cookie location.
Sean

Digital Certificates and Web Services with Oracle APEX

Hi people,
I am working to implement Web Service communication using Oracle Apex. I need to create an application that calls an external public Web Service in Apex. So far, so good, and i am able to work with a public WS without any problems.
However, this particular WS I'm calling has two peculiarities:
1) It is SSL-Secured (HTTPS). This means i have to communicate using SSL and Public/Private Certificates.
2) The message i pass (payload) must be digitally signed using XMLDsig Standard (www.w3.org/TR/xmldsig-core/)
The first requirement i am still testing, but it will probably work if i import the public and private keys using Oracle Wallet and point to this Wallet, just as PayPal sample in OTN samples does, don't you think? Should i have any problems with this?
The second one is more complicated, all APIs i have seen for XML Digital Signing are Java-based or .NET-based, i have found nothing based in PL/SQL packages or such. Can you point me some other options to sign this XML?
Please bear in mind that, since the WS has more than one method, i am using plain old UTL_HTTP to call it (just like the PayPal sample in OTN). PayPal requests that all communication be SSL-enabled, but has no mention whatsoever for Digital Signatures.
Can anybody help me out with this? any help is highly appreciated.
Regards
Thiago

Thiago:
You are correct in that there should be no problem interacting with a Web service that has an HTTPS endpoint as long as you create a wallet and specify it when you make your UTL_HTTP calls, like the PayPal example.
I am not aware of a PL/SQL utility to create a XMLDsig Standard message, but if you find some Java source out there that does it, you may be able to follow a technique I used for a similar use case:
http://jastraub.blogspot.com/2009/07/hmacsha256-in-plsql.html
Regards,
Jason

HTTP Tunneling and Load Balancing with Weblogic Server 6.1

We use T3 for Java client to application server communication (Weblogic Server
6.1) and keep the session open for the life of the client. We many customers
using this with load balancers and all works fine. We have just started to use
BEA's HTTP tunneling and I have a question concerning how this will work with
load balancers. Since the single T3 connection has been replaced with a series
of stateless HTTP connections, does the BEA tunneling code put session information
in the HTTP header? If so, what information does it place in the header. If
it does we should be able to use that to make sure that the load balancer always
sends HTTP requests with that session to the same application server.
Thanks!
Rick

Rick,
You may want to look at the Alteon and F5 configuration we have on edocs.
Take a look at the following URLs for a possible solution
http://edocs.bea.com/wls/docs61/cluster/alteon.html#591902
http://edocs.bea.com/wls/docs61/cluster/bigip.html#591902
Chuck Nelson
DRE
BEA Technical Support

Enabling server-side load balancing with Oracle 10g RAC

Hi, all.
I created a RAC database on vmware by using DBCA.
By default, remote_listener and tnsname.ora have been configured.
The followings are part of dba_services from my RAC database.
NAME, GOAL, ENABLED, CBL_GOAL
SYS$BACKGROUND NONE NO SHORT
SYS$USERS NONE NO SHORT
DEVDB NO LONG
By default(created by DBCA), server-side load balancing is enabled for
the RAC database, DEVDB??
--> GOAL of DEVDB is null, but CBL_GOAL IS LONG.
After creating a RAC db by using "DBCA", do I need to do something
for server-side load balancing??
If so what I need to do?? How can I test it??
And what is beneficial in enabling server-side loadbalancing ??
Is it good in the real world??
Thanks for reading.
Best Regards.
Message was edited by:
user507290

[urgent] 10gR2 RAC Load Balancing Configuration (client and server side)!!
[urgent] 10gR2 RAC Load Balancing Configuration (client and server side)!!
Virag

Failover and Load Balancing with JNDI Connection Pools

Hi,
I am trying to figure out how would JNDI Connection Pooling work along with failover or DNS Load Balancing.
Would connections be distributed equally among the list?
Would the pool work with multiple heterogeneous connections (i.e. connections to different but equivalent servers ), or do all the connections in the pool have to be homogeneous (i.e. to the same server)?
Thanks,
Sergio

Hi,
I am trying to figure out how would JNDI Connection Pooling work along with failover or DNS Load Balancing.
Would connections be distributed equally among the list?
Would the pool work with multiple heterogeneous connections (i.e. connections to different but equivalent servers ), or do all the connections in the pool have to be homogeneous (i.e. to the same server)?
Thanks,
Sergio

Reverse Proxy and Load Balancer for SMP 2.3 and Agentry Application

Hi Expert,
I'm putting in place a mobile solution composed by SMP 2.3 SPS 4 and SAP ECC 6.0. In the SMP 2.3 I created the agentry server and I have deployed my agentry application.
My SMP/Agentry infrastructure is composed by two servers therefore I need a load balancer for balance the load into the several servers. Furthermore I need to use a reverse proxy in my DMZ zone.
Based on what indicated in the SAP note "1904213 - SAP Mobile Platform Server Release Information" the Apache Reverse Proxy is not supported for Agentry clients. Agentry uses nginx for Reverse Proxy.
I also found the following document How-to-Guide for Reverse Proxy and Load Balancing in SAP Mobile Platform 3.x that explain how to set-up a reverse proxy and load balancer with nginx and apache.
Both the SAP note and the HOW to document are refereed to SMP 3.0 and not to SMP 2.3.
I would know if the NGINX must be used also for SMP 2.3.
Any suggestion/information is appreciated.
Thanks in advance
g.

Please see Agentry Network Landscapes

Cisco 2811 Router with 3 ADSL card and load balancing

Dear All,
I have few queries:
1. Does Cisco 2811 Router support 3 ADSL card?
2. We are the ISP. I want to do load balancing with 3 dsl
line on Cisco 2811 Router.
Please send me the linke for this configuration.
Thanks/Regards
Atul

hi
In 2811 you have 4 HWIC and 1 NME you can install 1-port ADSL WAN Interface Cardon the HWIC slots.
Also just enable 3 default (equal cost) routes towards the interfaces which will take care of the load balancing.
if you need more info and inputs do post out with ur requirements along with network topology in place at present..
regds

VPN device with dual ISP, fail-over, and load balancing

We currently service a client that has a PIX firewall that connects to multiple, separate outside vendors via IPSEC VPN. The VPN connections are mission critical and if for any reason the VPN device or the internet connection (currently only a T1) goes down, the business goes down too. We're looking for a solution that allows dual-ISP, failover, and load balancing. I see that there are several ASA models as well as the IOS that support this but what I'm confused about is what are the requirements for the other end of the VPN, keeping in mind that the other end will always be an outside vendor and out of our control. Current VPN endpoints for outside vendors are to devices like VPN 3000 Concentrator, Sonicwall, etc. that likely do not support any type of fail-over, trunking, load-balancing. Is this just not possible?

Unless I am mistaken the ASA doesn't do VPN Load Balancing for point-to-point IPSec connections either. What you're really after is opportunistic connection failover, and/or something like DMVPN. Coordinating opportunistic failover shouldn't be too much of an issue with the partners, but be prepared for lot of questions.

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.

Data Centre Interconnection - firewall and load balancer deployment

Hi all,
I've read lots of Cisco docs/white papers on DCI - Layer 2 extension between DCs, but as yet I cannot find any decent information on how best to deploy firewalls and load balancers in such a design. I've seen refs to FHRP isolation on Nexus 7k (and possible 6k if you use DCI block) but nothing on the services elements.
The services element seems to be a complete minefield here:
- active/standby across sites, or deploy resilient pairs in each site?
- how to align optimal traffic flows inbound and ooutbound (RHI, SNAT, etc.)
- best practice suggestions ideally.
Cisco DCI docs seem to always gloss over the fact that most customers would have to deal with firewalls and load balancers here, and simply refer to 'coming soon' for that info.
If anyone has any good suggestions/links to docs explaining detailed implementation info would be much appreciate
Thanks
Phil

You might want to check out this new product called ITD.
Simple and faster solution:
ITD provides :
ASIC based multi-terabit/s L3/L4 load-balancing at line-rate
No service module or external L3/L4 load-balancer needed. Every N7k port can be used as load-balancer.
Redirect line-rate traffic to any devices, for example web cache engines, Web Accelerator Engines (WAE), video-caches, etc.
Capability to create clusters of devices, for example, Firewalls, Intrusion Prevention System (IPS), or Web Application Firewall (WAF), Hadoop cluster
IP-stickiness
Resilient (like resilient ECMP)
VIP based L4 load-balancing
NAT (available for EFT/PoC). Allows non-DSR deployments.
Weighted load-balancing
Load-balances to large number of devices/servers
ACL along with redirection and load balancing simultaneously.
Bi-directional flow-coherency. Traffic from A-->B and B-->A goes to same node.
Order of magnitude OPEX savings : reduction in configuration, and ease of deployment
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The servers/appliances don’t have to be directly connected to N7k
Monitoring the health of servers/appliances.
N + M redundancy.
Automatic failure handling of servers/appliances.
VRF support, vPC support, VDC support
Supported on both Nexus 7000 and Nexus 7700 series.
Supports both IPv4 and IPv6
N5k / N6k support : coming soon
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Email Query or feedback:[email protected]

Oracle Timesten with oracle apex

I use Oracle 11gr2 and apex 4.2.4 how can i use oracle timesten with oracle apex?
I want to use timesten to improve performance on report by adding two tables to oracle timsten.

As far as I am aware, recent (11g onwards) releases of Oracle Heterogenous services do not work with TimesTen as they now require an OBC 3.x driver and the TimesTen driver is currently 2.0. Even if they did work, this would not be a useful solution. It might allow Apex to access TimesTen after a fashion (though that is far from certain) but the performance would be very poor due to all the network hops and software layers between the application and TimesTen.
If you put one or two tables in TimesTen then one problem from an Apex perspective is that it is now dealing with two databases; the TimesTen cache containing two tables and the oracle database containing all the other tables. Is Apex designed to cope with this? Does it have the concept of data located in multiple databases where one of them is not the Oracle database? Also, do you need transactions or queries (joins) that span the TimesTen tables and the tables in Oracle DB? If so then this also will not work as that is not possible today.
I have to say that as far as Apex goes I think this is likely a non-starter. However, if you do try it and have any success then please do post the results here as we'd be interested to hear about it.
Chris

Load balance with JMS in cluster

          I would like to develop a MDB listening to a topic, which can be deployed in a
          weblogic cluster, so that whenever a message is published to that topic, one and
          only one of the MDB in a wls server of the cluster will process the message, what
          is the best way to do this?
          thanks
          Zhou


Do you desire a distributed topic that doesn't replicate
          between topic members, but replicates
          to all subscribers on a particular member?
          If so, then a distributed topic is NOT
          what you want to configure. Instead, you can do as you
          suggest: set JNDINameReplicated to false
          and put a same JNDI named topic on each server.
          Tom
          Tom Barnes wrote:
          >
          >
          > x zhou wrote:
          >
          >> Can I do the following to achive what I want:
          >
          >
          > I don't know what you want. But a message sent to a topic
          > member still gets replicated to the other topic members.
          >
          > I'm guessing what you are looking for is a
          > distributed queue, not a distributed topic. I suggest
          > you look at the distributed queue option. A message
          > sent to a distributed queue will only get processed
          > by one MDB.
          >
          >>
          >> 1) create a distributed topic having topic name "topic.distributed"
          >> that has "topic.1"
          >> and "topic.2" as its member on two wls instances in a cluster
          >>
          >> 2) write a MDB that will be deployed seperately to 2 wls instances in
          >> the cluster,
          >> with different weblogic-ejb-jar.xml file: the difference is at the line:
          >>
          >> <destination-jndi-name>topic.1</destination-jndi-name> for server 1;
          >> <destination-jndi-name>topic.2</destination-jndi-name> for server 2;
          >>
          >> 3) create the publisher using the distributed topic (of jndi name
          >> 'distribute.topic'),
          >> according the document, it should send the message to one and only one
          >> of its
          >> member, and therefore the corresponding MDB in the wls instance of the
          >> cluster
          >> which receives the message will be notified
          >>
          >> and this will give me multi-threading in the same wls instance
          >> (because of MDB)
          >> and load-balancing across the whole cluster, right?
          >>
          >> Incidently, it looks like I can make the topic member's jndi name the
          >> same, as
          >> long as I un-check the "Replicate JNDI Name In Cluster" checkbox. Why
          >> is there
          >> such a box in the first place? Isn't the topic not clusterable?
          >>
          >> thanks
          >>
          >>
          >> Tom Barnes <[email protected]> wrote:
          >>
          >>> (1) Currently, there is no way in WL to get multiple consumers to share
          >>> a topic subscription - which is essentially what you are asking for.
          >>> The JMS standard doesn't support this either. This is not to say
          >>> that it wouldn't be a useful feature - I personally think it would be.
          >>>
          >>> (2) Why not use a queue?
          >>>
          >>> Tom
          >>>
          >>> X Zhou wrote:
          >>>
          >>>
          >>>> I would like to develop a MDB listening to a topic, which can be
          >>>> deployed
          >>>
          >>>
          >>> in a
          >>>
          >>>> weblogic cluster, so that whenever a message is published to that
          >>>> topic,
          >>>
          >>>
          >>> one and
          >>>
          >>>> only one of the MDB in a wls server of the cluster will process the
          >>>
          >>>
          >>> message, what
          >>>
          >>>> is the best way to do this?
          >>>>
          >>>> thanks
          >>>>
          >>>> Zhou
          >>>
          >>>
          >>
          >

Cache and Load Balancing with Oracle APEX Listener

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