Hi
You can use this "port-channel load-balance src-dst-ip", this will do a XOR on source & destination IP addresses and choose the interface G0/1 if the first bit of the result is 0 or the interface G0/2 if the first bit of the result is 1.
But you can check the path used with that command: "sh etherchannel 1 port-channel"
You can load balance with the mac-addresses too (it is the default mode I think)
http://www.cisco.com/warp/public/473/4.html
Rate if it helps.
MB

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This should do the trick
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How to load balance runbooks?

Hi,
Now I have successed to deploy an seccond Runbook Server in an test environment. But I have not fully understanding how the runbooks run on the primary vs standby. And I know that by default one Runbook Server can handle 50 runbooks, and how to scal out
runbooks?
How to load balance runbooks?
How to fail over runbooks?
/SaiTech

you can change how many concurrent runbooks are allowed to run on a single runbook server. 50 is just a default value.
you can assign a runbook to run on a specific runbook server (or more). this is the simplest way to load balance.
runbooks will failover automatically. do note that the runbook will start all over, hence you need to put in safeguards in your runbook. word of adwise is to keep runbooks small and chain them together. This makes them easier to recover.
Cheers,
Anders Spælling
Senior Consultant
Blog:
Twitter: LinkedIn:
Please remember to 'Propose as answer' if you find a reply helpful

How the Load balancing happens in CPO

Hi All,
On what bases the process engine selects the process or request and how the load balancing happens.

Hi!
I am a little confused by the question (as it refers to "request"), but I am going to assume that you are asking how a High Availability Process Orchestrator environment with several servers chooses which processes running on which server.
The answer to that question is...
In general, processes to be executed are split equally between all servers. The only piece of data being taken into account during process instance assignment is the current load on the servers (as counted by the number of top-level processes, not counting child processes). For example, suppose that there are 3 servers in the environment, and server A is running 5 top-level processes, servers B & C are running 3 top-level processes. When new process is started (e.g. on a schedule or manually or triggered via an external event), it will be assigned to either server B or server C for execution, because servers B & C have less load. If under the same circumstances (A:5, B:3, C:3), there are 4 processes started at the same time. When the work is distributed, the total expected work 5+3+3=11 (existing work) and 4 (new work) will be distributed equally with, with servers B&C each getting 2 new processes.
This is a general load balancing algorithms used by the servers in HA environment to decide which server runs which process instance.
There are other factors that come into play, as some processes/activities can only run on server A or server B for technical limitations (e.g. SAP work against a particular SAP System can only be executed from one server in the environment). When those come into play, the work may end up distributed unevenly.
Note that available memory, CPU load, or disk space on servers are not directly taken into account during load distribution.

Error while load balancing two servers

i have two Solaris servers running 9iAS R2 OC4j.
current patch level is 9.0.2.3
i'm trying to load balance the instances according
to the instructions in this document:
Oracle9i Application Server: mod_oc4j Technical Overview
all i should need to do is run the command:
dcmctl addOPMNLink <IP>:<PORT>
but when i do this i get this error:
ADMN-906026
i could not find any info on this error with searches of:
Google, Google Groups, Oracle MetaLink, Oracle OTN.
ideas? suggestions? anything?
thanks,
.rich

i just tried running a "dcmctl getError", and got this:
ADMN-906026
This Oracle9iAS instance is currently using a database repository to store configuration information. The OPMN link functionality is not supported when a database repository is being used. An Oracle9iAS cluster should be created to associate Oracle9iAS instances when using a repository.
the two OC4J instances in question are associated with an Infrastructure instance on their respective servers. do i need to de-couple the OC4J instances? or create a "cluster of one" instance?
.rich

How to load balance everything

Edit:
More up to date list is available on the wiki:
http://wiki.oracle.com/page/WCI+Load+Balancing
Its hard to find information related to deployment anymore, as there is no deployment guide for 10gR3 and a lot of information is scattered around in outdated blog posts. I'd like to keep a list of how to design every component for HA. I don't doubt that there are a lot of errors and things that need filled in so please reply with your additions and corrections.
h3. Types of load balancing referenced:
h4. external
refers to a hardware or software based load balancing handled outside Webcenter software
h4. MPPE
the 'massively parallel portlet engine' is the portal's ability to internally load balance web services that are configured with round robin DNS
h4. cold failover
I might have the terminology wrong, but I'm referring to when you have another instance of the product installed but disabled. The instance can be turned on in the event of an ourage of the primary component, but it is not automatically available.
h1. Portal
Load balanced with an external load balancer (sticky session enabled)
h3. References:
http://edocs.bea.com/alui/deployment/docs604/networking/c_loadbalancing.html
h1. API
h1. Publisher
Publisher is able to be load balanced by breaking it up into components: publisher admin, publisher redirect, published content
h2. Publisher admin
Cannot be load balanced, use cold failover
h2. Publisher redirector
MPPE (or external?)
h2. Published content
external
h3. References:
http://fsanglier.blogspot.com/2008/02/alui-publisher-increase-performance.html
h1. Collaboration
External / MPPE (with collab internal clustering)
(Although i'm currently having issues wtih this and someone reported that you can do without the collab internal clustering)
h3. Collab's API
When using the IDK to connect to collab, custom applications bypass the MPPE and communicate directly to the collab host, losing the benefit of the MPPE. In order to load balance in this situation, the collab host must use external load balancing. (is this true?)
h3. "Search" service (the collab one) (only applies to 4.5 or newer)
Install on same servers as collab?
http://download.oracle.com/docs/cd/E13158_01/alui/collaboration/docs103/install/install.htm#i1138897
h3. References:
http://edocs.bea.com/alui/deployment/docs604/networking/c_loadbalancing.html
recent collab outage related questions
h1. Document Repository
External
h1. (AD/LDAP) Identity Web Services
MPPE to the Web Services
External between Web Services and AD /LDAP servers (or use HOSTS files to point each ADAWS server to a differnet AD server?)
h1. Search
(grid search: 6.1 or newer)The portal can load balance search requests internally. Each search node has knowledge of other nodes, so only 1 node needs to be reported to the portal. When the portal starts up, the 1 search node that is registered with the portal MUST be available.
h1. Analytics
Analytics UI
(i'm not sure? i'm guessing anything would work here because the admin UI is pretty much read only on the database)
Analytics collector can be load balanced (as of 2.5)
http://download-llnw.oracle.com/docs/cd/E13158_01/alui/analytics/docs103/installALI/quickstart.html#wp1063387
h1. Automation
Load balancing for reduncancy is not possible. However, the work can be split up Automation servers are assigned to different folders. Don't assign 2 automation servers to the same folder, as they can compete for jobs. (?)
h1. Content Upload
(mppe / external)?
h1. ALUI Directory Service
h1. Remote Portlet Service
? (i'm gussing MPPE)
h1. Notification
? no idea
h1. What else am i missing?
Edited by: Joel Collins on Apr 27, 2009 6:52 AM

Here are few bits of info:
For load balancing for Analytics, that isn't officially supported yet for the UI and Administration components. It might work with sticky sessions from portal-to-analytics but that doesn't get you much. Improving the options there would be a good enhancement request.
For the collector, I think there are two important things to remember. Use broadcast mode. I've never actually seen it in unicast mode, but broadcast definitely works. Also, remember that this is all managed by Portal and Analytics - you don't use your own load balancer between Portal instances and the Analytics Collector instances.
Finally, ALUI Directory is not certified to be load balanced yet. On a separate note, ALUI Directory has a socket leak on Windows due to a bug in the version of Jrockit that ships with it. Upgrading the embedded application server for the ALUI/WCI installation to jrockit-R27.5.0-jdk1.5.0_14 will resolve it.

How to load-balance LotusNotes "Sametime" with CSS11500

I have 2 redundant CSS since a while, working fine. Recently I wanted to add load-balancing for the Chat service of LotusNotes Sametime. The problem is that the chat conversations are disconeected some how. On a first configuration, I didn't configure sticky mode on this content. Since then I added sticky mode "srcip" and a long sticky timeout (600 mn or 10 h.). But th eproblem is still the same. Can someone help ? Thank you. note : you'll find attached the configuration for the chat content.

Hi,
The CSS 11500 uses the ArrowPoint Content Aware (ACA) service to gather response time data for every flow for building statistical averages/variances for every service and content rule. The best servers are used, while the slow servers are pruned from the eligible list. This service also can manage persistent connections for e-commerce based on IP addresses (range), Secure Socket Layer (SSL) application IDs, and cookies.
As you are having only 2 servers for load-balance.
As your keepalive time is 30 sec which is quite high.
I suppose you should change your keepalive frequency 30 to
keepalive frequency 5
try this
as
using the default values of a 5-second keepalive frequency interval, a 5-second retry period interval, and maximum of three failures, a service can transition from the alive state to the dead state in 15 seconds; a 5-second interval between a keepalive response and the initial keepalive failure based on the keepalive frequency, and two failures, each occurring at 5-second intervals based on the retry period.

How to Load Balance Event Collection

Hi,
I got the Windows Event Forwarding working, but how can I load balance a huge number of souce computers to forwared their events to two or more servers in my domain?
Im Using Windows Server 2012R2 as my collectors and 2008R2 and after as my forwarders.
Thanks for your replies.

Hi DDerJoel,
Windows Event forwarding is a build-in functionality, easy to use. But it does not provide load balance function. System Center Operations Manager, as a full grown product,
provides more advanced enterprise monitoring solution.
Or you can refer the following related KB to optimize your log forwarding server.
Configure Advanced Subscription Settings
http://technet.microsoft.com/en-us/library/cc749167.aspx
I’m glad to be of help to you!
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]
Thanks for reply,
I already got to the page you provided above in my research and it helped me out a lot, but not enough I think.
I would highly appreciate if you find some time to help me get out of my confusion Here
Thanks in advance.
PS: Am I able to set up a email notification, if a question qot anwered? Thanks.

Load balancing two or more Web Provider instaces

Is it possible to balance the load between
two or more Web Provider instaces?
I think that HTTPSession exists between
Parallel Page Engine (PPE) and
the Web Provider instance.
Is it correct?
If so, how can I achive load balancing of
Web Providers?

Ok, we tested successfully in our environment and here are the details:
Scenario:
1) One Management Server and two Publishing Servers
2) Publishing Servers are load balanced in F5 (VIP Address)
3) Publishing Servers use Custom App pool identity (Application Pools-->AppVPublishing)
4) App-V 5 Clients use the VIP address in the registry for Publishing Server name and URL
Steps on SQL Side:
1) Obtain the Object SID of the Custom App Pool Identity (ADSI Edit)
2) Login to SQL Server as Admin and launch SQL Mgmt Studio
3) Select App-V 5 DB and expand tables and select 'dbo.PublishingServers'
4) Right click the above table-->edit top 200 Rows'
5) Replace 'Sid' with the one obtained in Step 1
6) File-->Save All
App-V Mgmt Console and Clients
1) Add new packages
2) From any App-V client-->Sync Publishing Server
3) From any browser-->http://<VIP address>:889
4) Make sure all changes on Mgmt Console are reflecting on the Clients
Thanks to Greg who put us in right direction even though scenario is bit different. Also thanks to Chuck Timon from MS App-V team for testing with me.
Now going back to see if we can test this using DSR method on F5 which we tested successfully with App-V 4.6 SP1 earlier. If anyone tested DSR (F5) in App-V 5, please let me know.
Thanks
Raj Yarlagadda
I have - 2 publishing servers listed under this "edit top 200 rows" you want to modify the SID of the publishing
servers computer accounts to the Custom App Pool Identity's SID ? you can't have the same SID
listed for both?

How does load-balancing with WebCache work - is there still a bottleneck?

Hello,
We're migrating an old Forms 6i app to 10.1.2.0.2 (apps servers = Redhat Linux), and are starting to consider using WebCache to loadbalance between two application servers.
My question is this - say we have apps servers A and B, both running Forms and Reports Services. We use Webcache on server A (don't have the luxury of a third apps server...) to load balance between A and B. So all initial requests come into A, which in some cases may then be diverted to start a new Forms session on B.
For those users whose middle-tier sessions are now running on B - will all network traffic for their Forms session continue to be routed through Webcache on A, then to B, over the course of the session? Or does Webcache somehow shunt the whole connection to be straight between the client PC and server B, for the duration of that Forms session?
If the former, does that mean that the server hosting Webcache can still be a significant bottleneck for network traffic? Have people found load-balancing with Webcache to be useful..?
Thanks in advance,
James

Hi gudnyc,
Thanks for posting on Adobe forums.
For HDPI you do not have to do any It will adjust automatically.
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Question on how does load balancing work on Firewall Services Module (FWSM)

Hi everyone,
I have a question about the algorithm of load balancing on Firewall Services Module (FWSM).
I understand that the FWSM supports up to three equal cost routes on the same interface for load balancing.
Please see a lower simple figure.
outside inside
--- L3 SW --+
|
MHSRP +--- FWSM ----
|
--- L3 SW --+
I am going to configure the following default routes on FWSM point to each MHSRP VIP (192.168.13.29 and 192.168.13.30) for load balancing.
route outside_1 0.0.0.0 0.0.0.0 192.168.13.29 1
route outside_1 0.0.0.0 0.0.0.0 192.168.13.30 1　　　　　　
However I don't know how load balancing work on FWSM.
On FWSM, load balancing work based on
Per-Destination ?
Per-Source ?
Per-Packet ?
or
Other criteria ?
Your information would be greatly appreciated.
Best Regards,

Configuring "tunnel default gateway' on the concentrator allowed traffic to flow as desired through the FWSM.
FWSM is not capable of performing policy based routing, the additional static routes for the VPN load balancing caused half of the packets to be lost. As a result, it appears that the VPN concentrators will not be able to load balance.

Load Balancing Two Servers

i have two Solaris servers running 9iAS R2 OC4j.
current patch level is 9.0.2.3
i'm trying to load balance the instances according
to the instructions in this document:
Oracle9i Application Server: mod_oc4j Technical Overview
all i should need to do is run the command:
dcmctl addOPMNLink <IP>:<PORT>
but when i do this i get this error:
ADMN-906026
i could not find any info on this error with searches of:
Google, Google Groups, Oracle MetaLink, Oracle OTN.
ideas? suggestions? anything?
thanks,
.rich

Rich -- if you have installed the Oracle9iAS instances and associated them with the infrastructure, then you don't need to perform the manual clustering operations which are contained in the doc you reference.
By associating with the infrastructure (as the error message indicates you have done), the components should all be associated with one another and you'll be working in what we call a managed cluster mode.
If you do have the instances associated with the infrastructure, then what you need to do is use the management console (or dcmctl) to create a cluster and then add the two instances to the cluster. This will then mean that the same applications get deployed to the two instances, and will add an Oc4jMount point to OHS that will allow the incoming requests to be dispatched to the two backend instances.
There should be a guide on OTN (HA Guide, Concepts Guide) which explains the concepts behind these terms if you need.
Here's the dcmctl commands to create a cluster then add the instances to the cluster (this is from my 904 instance, I don't have a 902 instance installed)
[oracle@peterman ~]$ dcmctl -help createcluster
createCluster
Creates a managed Oracle Application Server cluster.
Note
Oracle recommends that Oracle Application Server Clusters using a file based repository contain four (4) or less than four instances.
Type
Configuration Management
Syntax
createCluster -cl cluster_name
Description
A managed cluster is created.
Notes for using createCluster:
You must issue this command in the Oracle home of an instance that
belongs to a farm (that is, is associated with a metadata repository).
The cluster will be created in that farm.
The cluster has no members when created. You can add members using
joinCluster.
You can create an unlimited number of clusters.
Example
dcmctl createCluster -cl cluster1
[oracle@peterman ~]$ dcmctl -help joincluster
joinCluster
Adds an Oracle Application Server instance to the named managed cluster.
Notes for using Oracle Application Server clusters:
Oracle Application Server supports heterogeneous instances as part of the same farm. For example, an instance running on Solaris Operating System, an instance running on a Linux system, and an instance running on an HP-UX system can reside in the same farm.
Oracle Application Server instances that you want to be part of a cluster must be installed on identical operating systems
Oracle recommends that Oracle Application Server Clusters using a file based repository contain four (4) or less than four instances.
If you are using Oracle Enterprise Manager Application Server Control, then, after issuing the dcmctl joinCluster command, you must stop and then start Oracle Enterprise Manager Application Server Control using the commands:
%emctl stop iasconsole
%emctl start iasconsole
Type
Configuration Management
Syntax
joinCluster -cl cluster_name [-i instance_name]
Description
Adds an application server instance to the managed Oracle Application Server cluster specified with the -cl option. By default, this command uses the local instance. You can specify a different instance with the -i option. The instance must be a member of the same farm as the
cluster. There is no limit to the number of instances you can add to a cluster. An instance is stopped after being added to a cluster, so you must manually start it.
Example
To add the local application server instance to cluster1 and restart
it:
dcmctl joinCluster -cl cluster1
dcmctl start
To add instance1 to cluster1 and restart it:
dcmctl joinCluster -cl cluster1 -i instance1
dcmctl start -i instance1
cheers
-steve-

How to load balance Agents across multiple Oracle Management Servers?

Hi everyone
We have the 2 OMS servers in our OEM environment. We would like to set up our management agents to load balance over these 2 servers...Or if not load balance then at least set up the agents so they can access either/or OMS.
I've looked through the documentation and in google, but can't seem to find the answer.
Can someone point me towards the documentation please
Thanks
R

OMS is just an appserver with a repository. You can load balance the appservers with an F5. You can load balance the repository with RAC.
So ... your options for load balancing and resilience are :-
1. one agent on each server, multiple OMS appservers load balanced, one RAC database (with dataguard standby)
2. two agents per server, two appservers, two repositories.
Both architectures work. Option 1 offers the best load balancing and resilience.

How to load balance serving MP4 files via AMS

Hey gurus,
We have one centralized storage server that stores videos, Lets call this Server A, we have 4 more servers that we want to use to load the files from Server A to load balance and location balance the loading of files.
Servers B-E are on a private VLAN with Server A; so what we're doing now is mounting Server A on to Servers B-E and serving the files via AMS; this has proved to be quite inefficient.
For Live Streams; we use multi-point publishing to achieve this; is there a way to do this with recorded files?
Please advise!
Thanks

Here are few bits of info:
For load balancing for Analytics, that isn't officially supported yet for the UI and Administration components. It might work with sticky sessions from portal-to-analytics but that doesn't get you much. Improving the options there would be a good enhancement request.
For the collector, I think there are two important things to remember. Use broadcast mode. I've never actually seen it in unicast mode, but broadcast definitely works. Also, remember that this is all managed by Portal and Analytics - you don't use your own load balancer between Portal instances and the Analytics Collector instances.
Finally, ALUI Directory is not certified to be load balanced yet. On a separate note, ALUI Directory has a socket leak on Windows due to a bug in the version of Jrockit that ships with it. Upgrading the embedded application server for the ALUI/WCI installation to jrockit-R27.5.0-jdk1.5.0_14 will resolve it.

2950 load balancing two Windows 2003 servers

We just purchased two Windows 2003 servers that connect directly to a 2950. They have setup network load balancing on the servers. With this setup both of the servers have the same MAC address cloned to their NICS. This is obviously causing a problem with the ARP table on the 2950. I opened a TAC case, and they said it was a Microsoft problem. The vendor that installed the servers says it the switch. Has anybody ever done this?
Thanks

Hello,
I think you would speak about "MAC address table" and not "ARP table" for your 2950 switch. It's typically a trouble known by Microsoft and describe here :
http://support.microsoft.com/default.aspx?scid=kb;en-us;193602
Regards
Yves

How to load balance two link (resilient link)

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