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.

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 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

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

Installing 2 Application server and 1 DB server and load balancing for 11i

Hi,
I need info on how to install and configure load balancing for 11.5.8 on Win2000. The scenario: 1 db server DB, 2 apps/web/forms servers AP1 and AP2. Using rapid install you can only specify one db server A and one form server in multi node installations, right? How do I install the form server on AP2? Can I use the same config.txt? The computer name for AP2 is different.
Thanks & Regards,
Jagal

I have the very same issue. We want to install 4 web/form servers on a hardware load-balancer and the issue is we can only specify one forms server.
Does anyone know the secret bullet here?
Thanks
John

Changed Ulimits values for the Oracle user and getting error -bash: ulimit: max user processes: cannot modify limit: Operation not permitted when logging in.

I'm trying to increate the ulimits for max user processes and open files for the oracle user. I've set the values in limits.conf, /etc/profile and in oracle's environment scripts. Now when I log in as oracle I get the below errors. If I change the ulimits back to the original values errors go away but ulimits aren't changed.
login as: oracle
[email protected]'s password:
Last login: Fri Mar 6 09:56:02 2015 from mtkadmin12
You are logging onto an Oracle system.
Kickstarted on: 2014-06-05
-bash: ulimit: max user processes: cannot modify limit: Operation not permitted
-bash: ulimit: max user processes: cannot modify limit: Operation not permitted
[oracle@servername ~]$

Thanks for the update.
I modified the /etc/security/limits.d/90-nproc.conf and added a line for oracle and also modifed the oracle.sh file. The ulimits are setting correctly when I su - oracle but they are still wrong when sshing in as oracle.
[root@mtkdevorap11d-1 ~]# su - oracle
[oracle@mtkdevorap11d-1 ~]$ ulimit -Ha
core file size          (blocks, -c) unlimited
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 1030982
max locked memory       (kbytes, -l) 94371840
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65536
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) unlimited
cpu time               (seconds, -t) unlimited
max user processes              (-u) 16384
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
[oracle@mtkdevorap11d-1 ~]$
[oracle@mtkdevorap11d-2 ~]$ ssh mtkdevorap11d-1
Last login: Mon Mar 16 13:04:16 2015 from mtkdevorap11d-2.conveydev.com
You are logging onto an Oracle system.
Kickstarted on: 2014-06-05
[oracle@mtkdevorap11d-1 ~]$ ulimit -Ha
core file size          (blocks, -c) unlimited
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 1030982
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 4096
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) unlimited
cpu time               (seconds, -t) unlimited
max user processes              (-u) 16384
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
[oracle@mtkdevorap11d-1 ~]$

High Availability and load balancing

Hi,
I have 6513 catalyst with redundant sup720 and msfc. All the servers are connected to this switch and there is no vlan configuration. Here is the hardware config of the box.
Mod Slot Ports Module-Type Model Sub Stat
1 1 48 10/100/1000BaseT Ethernet WS-X6148-GE-TX no ok
2 2 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
3 3 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
4 4 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
5 5 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
6 6 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
7 7 2 1000BaseX Supervisor WS-SUP720-BASE yes ok
15 7 1 Multilayer Switch Feature WS-SUP720 no ok
8 8 2 1000BaseX Supervisor WS-SUP720-BASE yes
I want to introduce a new 6513 chassis with same knid of configuration. Please help me out to configure these boxes to provide the high availabilty as well as load balancing for the server farm. Do I need to do any thing on the servers in terms of hwardare / software requirment to achieve the objective.
thnaks & regards
shalabh

The config is the same for both switches:
(this will enable port channel bundle, you can specify upto 16 ports..i would recommend 10)
(config-if#)interface range gigabitethernet 1/1-2
(config-if#)Description PORT-CHANNEL Interface
(config-if#)switchport
(config-if#)channel-group 1 mode on
(config-if#)switchport trunk encapsulation dot1q
(config-if#)switchport mode trunk
(config-if#)speed 1000
(config-if#)no shutdown
(Enable SRM SSO)
router(config)#redundancy
router(config-red)#mode sso
router(config-red)#end
router#show redundancy states
you should see my state = active
peer state = standby hot
where are your users come into the 6500's? if they are sitting on the 6500's I would recommend putting them in a separate vlan.

Network load balancer for Agentry applications

Hi Expert,
I'm going to implement a SAP Mobile Platform solution that will use an agentry application and I need some clarification about the HA configuration and the usage of the network load balancer and relay server. Just for information I'm going to use SMP 2.3 SP4.
My understanding is that Relay server is a reverse proxy and load balancer for SMP but It can't be used for the agentry applications. Is this correct?
Based on the standard configuration in order to balance the load of the client devices in the SMP cluster I have to use a Network load balancer, therefore the technical architecture of my solution should be the following:
|Agentry Client device| ----> | Network Load Balancer | ----> | SMP and Agentry Cluster| -----> |Back end systems|
Is this correct? I didn't find specifications about the Network load balancer.. Is there a list of the Network load balancer products supported from SAP for agentry application. Is there any best practice on the network load balancer?
Thank you in advance for you collaboration.
BR
g.
Tags edited by: Michael Appleby

Because we don't test any directly with our QA we don't have have a preferred products. Talking to our consulting group they normally just use what the customer already has installed in their network. Both Software or hardware load balancers has been used.
The key part needed for the load balancer for Agentry 6.0.x and SMP 2.3 (not SMP 3) that it is set to TCP Pass through.
Stephen

Problem in using OracleAS Web Cache as Load Balancer

I have two machines:
aimssrv.world.com and aimsrep.world.com.
Both of above machines are running Redhat Linux AS 4.
On both machines, I have installed Oracle Forms and Reports 10g Services. I have deployed my application on both machines.
I am able to access my application at aimssrv.world.com by doing:
http://aimssrv.world.com:7778/forms/frmservlet?config=aims
and I am also able to access my application at aimsrep.world.com by doing:
http://aimsrep.world.com:7778/forms/frmservlet?config=aims
I have implemented OracleAS Web Cache at machine aimssrv.world.com, and have enabled the Load Balancing.
In Origin Servers, its showing me two servers:
Host => aimssrv.world.com, PORT=> 7778, Routing=> Enabled, CAPACITY=>100, Failover Threshold=>5, PING URL=>/, PROTOCOL=>HTTP
Host => aimsrep.world.com, PORT=> 7778, Routing=> Enabled, CAPACITY=>100, Failover Threshold=>5, PING URL=>/, PROTOCOL=>HTTP
In Site Definition, I have following information:
Host Name=> aimssrv.world.com, PORT=>7777
In site-to-server mapping, I have following information:
Priority      Host Name      Port      ESI Content Policy      Host Name      Port      Proxy
1      aimssrv.world.com      7777      Unrestricted      aimssrv.world.com      7778      No
aimsrep.world.com      7778                                    No
2      *      7777           Exclude Fragments      aimssrv.world.com      7778      No
3      *      *           Exclude Fragments      aimssrv.world.com      7778      No
In Session Binding, I have selected "JSESSIONID" as session, and "OC4J-based" as session binding mechanism.
Now please guide me as how would I run my application by using the OracleAS Web Cache?
What would be the URL?
Do I need to make any changes in httpd.conf files of aimssrv.world.com and aimsrep.awc.com?
Please guide.
Thanks and regards

hi,
i hv recently configured webcache load-balancing for my 2 mid-tiers.I did not upgrade pre-requisite webcache upgrade patch 4569559 to my 10g rel 2 10.1.2.0.2 OAS and it still worked a bit but I do have some doubts why oracle recommends installing this patch before configuring webcache load-balancing.Have u?
btw u need to collapse all the features of webcache of caching to turn on http load-balancing.U need to add a parameter to internal.xml (LOADBALANCE ON="YES") and register origin servers of both servers with each other and map ur sites so that origin servers of both servers will cater sites of server1 and server2 at the same time.
what worked for me is i registered origin server of server1 at server2 and origin server of server2 at server1 and mapped site of server1 (http://server1:port/forms/frmservlet?config=something) to work with origin server of server2 as well at site-to-server page so that origin servers of both servers will load-balance my server1 site and vice-versa.
But still its not seamless.The initial site request was still being routed to the server which is DOWN first and not seamlessly routed to other server which is UP.Maybe webcache upgrade patch would hv done this seamlessly????
Edited by: anandk on Oct 26, 2009 6:28 PM

Load Balancing for Oracle Release 11i

Hi there,
I am trying to find some recommendations on the need for load balancing in the middle tier for a 3 tier Oracle Release 11i implementation. Here are the questions that I have.
1. Is load balancing very common for a 11i implementation ?
2. What are the probable issues that one might encounter if there is no load balancing ?
3. If there is load balancing how many servers are generally used for the same ?
4. Do we only install Forms server on multiple servers or we install WebDB and Apache on all the servers ?
5. Is it true that Web servers are the most likely to be down and thus mandating the use of load balancing ? If that is true, would it be prudent to install Web Server and Form Server on each server m/c and in the process having redundant servers ?
Let me know your thoughts.
Thanks,
- Raj

I'm in the middle of doing this right now. There is a doc on metalink (233428.1) that details the process. I would highly recommend trying this in dev/test env first. Even though the instructions are very straight forward and not very complicated, I'm still having configuration issues.
Clint

What is the alternative of F5 BIG-IP LTM Load Balancer for OEM 12c

We want to implement service load balance, however oracle recommended
F5 BIG-IP LTM Load Balancer for OEM 12c
How much it is cost? and is there any free alternative we can use which supported by Oracle?
Thanks

Apart from F5, Cisco is another SLB vendor. I am not sure about any free alternative though.
Note that regardless what SLB that you pick, it should meet the requirements documented in section 29.3.2.2 of the EM12c Release 3 Administrator's Guide:
The SLB must provide support for multiple virtual server ports. Enterprise Manager typically requires that up to 4 ports are configured on the SLB (Secure Upload, Agent Registration, Secure Console, Unsecure Console)
Support for persistence. HTTP and HTTPS traffic between the browser and the OMS requires persistence
Support for application monitoring. The SLB must be capable of monitoring the health of the OMSs and detecting failures, so that requests will not be routed to OMSs that are not availa
Regards,
- Loc

Lync 2013 Enterprise load balancing on the front end and edge pool

Hi,
I am setting up a Lync 2013 Enterprise deployment consisting of a Front End pool (x2 FE servers) and an Edge pool (x2 Edge servers). I'm seeing some conflicting advice regarding load balancing using hardware or DNS for the front end and the edge.
On the front end I have 2 internal DNS records 'lyncfepool1.contoso.local' each of which map to one of the IPs of the FE servers. I've used my details to populate the Detailed Design Planner excel spreadsheet and am told that I require a HLB to load
balance my front end pool. I'm aware of the need to load balance HTTPS traffic internally (which will be done by TMG) however other traffic to the front end (SIP, etc) can be balanced by DNS only, and not require a HLB?
Can someone clarify the front end requirement?
Also - looking now at the edge pool - this site again have two edge servers in a pool. We are using a total of six private IP addresses, two per edge service (2 x av.contoso.com, 2 x sip.contoso.com and 2 x webcon.contoso.com). These will be
NAT'ed by the external firewall and directed to the respective external (DMZ) IP addresses on the Edge servers on port 443. I know this isn't true roundrobin due to the intelligence of the Lync client when connecting (in that the Lync client will connect
to one of the public IPs and if it can't connect, it will know to connect to the other service IP), however I want to clarify this set up, particularly the need to direct the external public IP traffic at the DMZ Edge IP specified in the topology builder.
I've attached a basic diagram of the external/DMZ/Edge side which hopefully helps with this question
Persevere, Persevere, Per..

That is because you will always need HLB for a front-end server since it hosts the Lync webservices which use HTTP/HTTPS traffic.
The description on the calculation tool also describes this correctly:
Supports Standard and Enterprise pools (up to 12 nodes), with pure device-based load balancing or a combination of DNS load balancing and device-based load balancing (for
Lync web services)
You can use either Hardware or DNS loadbalancing for SIP traffic only, but you will always need a HLB for the webservices. Both are applicable for the Front-End so you have either
full HLB for both SIP and HTTP(S) traffic
DNS LB for SIP traffic and HLB for HTTP(S) traffic
Hope this is more clear :-)
Lync Server MVP | MCITP Lync Server 2010 | If you think my post is the answer to your question, please mark it as answer so future visitors can easily find it.

Inventory load failed... OPatch cannot load inventory for the given Oracle Home.OPatch failed with error code = 73

Hi,
I am going to apply bundle patch and my oracle database is 11.2.0.2 and platform Microsoft Windows x86. As per the read me file Oracle recommends that to use OPatch utility release 11.2.0.1.3 or later.To check the accessibility to the inventory i use %ORACLE_HOME%/OPatch/opatch lsinventory command.
It ended up with giving below details.
Invoking OPatch 11.2.0.1.1
OPatch could not create/open history file for writing : ***my oracle home path***\cfgtoollogs\opatch\opatch_history.txt
**oracle_home***\cfgtoollogs\opatch\opatch_history.txt (Access is denied)
Oracle Interim Patch Installer version 11.2.0.1.1
Copyright (c) 2009, Oracle Corporation. All rights reserved.
OPatch could not open log file, logging will not be possible
Oracle Home       : *****
Central Inventory : C:\Program Files\Oracle\Inventory
   from           : n/a
OPatch version    : 11.2.0.1.1
OUI version       : 11.2.0.2.0
OUI location      : **ORACLE_HOME***\oui
Log file location : **ORACLE_HOME**\cfgtoollogs\opatch\opatch2015-04-09_16-27-49PM.log
Patch history file: **ORACLE_HOME**\cfgtoollogs\opatch\opatch_history.txt
Inventory load failed... OPatch cannot load inventory for the given Oracle Home.
LsInventorySession failed: LsInventory cannot create the log directory **ORACLE_HOME***\cfgtoollogs\opatch\lsinv\lsinventory2015-04-
09_16-27-49PM.txt
OPatch failed with error code = 73
Can anyone please help me to solve this?
Do I need to install latest opatch utility?

Hi,
this error message " LsInventorySession failed: LsInventory cannot create the log directory **ORACLE_HOME***\cfgtoollogs\opatch\lsinv\lsinventory2015-04-
09_16-27-49PM.txt "
indicates that you have permission issue with your file systems : ORACLE_HOME/cfgtoollogs/opatch
double check the owner of this file system.
Regards,

Resources for designing redundancy and load balancing among data centers

Hello all,
I'm looking for resources for designing redundancy and load balancing between two physically separate data centers. I'm looking for some "best practice" links, tips, or recommendations. Any suggestions are appreciated!
Thanks.

I think that we can do per packet load balancing by using CEF.
Please go to the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fswtch_c/swprt1/xcfcefc.htm#xtocid5
Also, you may need local director or distributed director. What resource/application is availalbe in the data centre? (e.g. http server, ftp server, TN3270 server, and so on)

How to get Open Balance for the year and Total Ending Balance?

For a given account, how to get Open Balance for the year (Cumulative Ending Balance) and Total Ending Balance (Cumulative Ending Balance)?
Is there any function module available? or should I read from some tables? Please advice.

Hello Paul,
You could try calling one of the following BAPIs - see which one meets your requirement. They are documented well so shouldn't be a problem finding out the correct one for your requirements.
BAPI_GL_GETGLACCBALANCE
BAPI_GL_GETGLACCCURRENTBALANCE
BAPI_GL_ACC_GETBALANCE
BAPI_GL_ACC_GETCURRENTBALANCE
BAPI_GL_ACC_GETPERIODBALANCES
BAPI_COND_VAL_DECRE_BALANCES
You might have to put in some of your own logic after the BAPI call to get what you want.
Hope this helps,
Cheers,
Sougata.
p.s. Also look at FM FAGL_GET_ACCOUNT_BALANCE
Edited by: Sougata Chatterjee on May 7, 2008 11:47 AM

Cache and Load Balancing for the Oracle APEX Listener

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