BI Load Balancing issue after support pack up grade

Hi BI Basis Gurus,
Before Upgrade :
System Info: SAP_BW -700 0014 SAPKW70014 SAP NetWeaver BI 7.0
Self Load from DSO to DSO & DSO to InfoProvider: Always use to kick 15 to 17 TRFCs
Application Servers: 3
Load balancing : accross the 3 was good.
Data load time: around 1.5hrs per 13million records
After Upgrade :
System Info: SAP_BW -700 0019 SAPKW70019 SAP NetWeaver BI 7.0
Self Load from DSO to DSO & DSO to InfoProvider: Now it is kicking only 2 TRFCs
Application Servers: 3
Load balancing : accross the 3 was poor.
Data load time: around 3.5hrs per 13million records
We validated / modified all the settings in the following TCODEs:
SMQS , SM59, RZ12, SBIW & SPRO
Still the system is not able to kick off more TRFCs .
The servers has 30 max conn. Please let us know if anybody has any suggestion as of today we had discussed with 4-5 basis guys & have no result till now.
Thanks
Edited by: umesh manoor on Aug 27, 2009 10:12 PM

We checked the required TCODEs:
1. RSODSO_SETTINGS
     the parallel process for activation : 6
But this is not causing any issue as the activation time is same before & after sp upgrade.
2. RZ12
Logon Group   Instance
Default               Ins1
Default               Ins2
Default               Ins3
Please let us know if you have any suggestion.
Thanks

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BI Load Balancing issue after support pack up grade ( 14 -- 19)

Hi BI Basis Gurus,
Before Upgrade :
System Info: SAP_BW -700 0014 SAPKW70014 SAP NetWeaver BI 7.0
Self Load from DSO to DSO & DSO to InfoProvider: Always use to kick 15 to 17 TRFCs
Application Servers: 3
Load balancing : accross the 3 was good.
Data load time: around 1.5hrs per 13million records
After Upgrade :
System Info: SAP_BW -700 0019 SAPKW70019 SAP NetWeaver BI 7.0
Self Load from DSO to DSO & DSO to InfoProvider: Now it is kicking only 2 TRFCs
Application Servers: 3
Load balancing : accross the 3 was poor.
Data load time: around 3.5hrs per 13million records
We validated / modified all the settings in the following TCODEs:
SMQS , SM59, RZ12, SBIW & SPRO
Still the system is not able to kick off more TRFCs .
The servers has 30 max conn. Please let us know if anybody has any suggestion as of today we had discussed with 4-5 basis guys & have no result till now.
Thanks

Can you try no of parallel processing option in DTP Overview which may help you in kicking of parallel processing between ODS to ODS load.
Thanks,
Arun

CSS arrowpoint cookie load balancing issue

Hi guys,
I need some advice on a load balancing issue.
We have connections hitting the CSS via a proxy environment. As a result i see only one source ip address. I want to use arrowpoint cookies for session stickeyness. However when i enable the rule the tcp session negotiation fails. The CSS sends a TCP/RST which terminates the session.
Here's the rule config:
content HTTP_rule
add service ZSTS299102
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Remko,
in L3/L4 the CSS sends the SYN directly to the server.
So when the FIN comes in, we simply pass it to the server.
With L5 the CSS spoofs the connection and we select the server only after receiving the GET.
If there was some delay between the GET and the FIN, the CSS would have time to establish a connection with the server and the FIN could be simply forwarded.
Unfortunately, in this case the FIN is right after the GET with no delay.
Gilles.

What are the key components to be mointored after support pack installation

I m an PI developer ,last Friday Basis installed the service pack 15 in Quality box . They are asking me to mointor the QPI to make sure everything is running fine and let them know so they can install the service pack in Production box.
Apart from normal monitoring of the system ( RWB and SXMB* ), what are the other components i need to monitor.
Can you tell me what to be monitored after Support pack installation.

Hi,
1) If CCMS is configured then you can monitor this as well (RZ20)
2) Keep an eye on Queues
Regards,
I m an PI developer ,last Friday Basis installed the service pack 15 in Quality box . They are asking me to mointor the QPI to make sure everything is running fine and let them know so they can install the service pack in Production box.
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Can you tell me what to be monitored after Support pack installation.

ITS load balancing issue

Hi all,
During our testing we are getting a load balancing issue. However, one of the agates in our network is has more CPU power than compared to the other agates in our ITS network. The memory on all the agate servers is the same.
Our current issue we are getting is the one agate that has more cpu power but acquires more sessions as compared to the other two agates. It roughly gets 60 more sessions per agate process as compare to the other Agate servers. Does having more cpu on a Agate affect the load balancing on ITS? We are on ITS patch level 19 with the Hotfix.
Thanks,
Jin Bae

Hello Jin,
yes, at (re)initialize the WGate retrieves the capacity from the AGates.
This is an accumulated number based on CPU performance and the number of CPUs!
The number can be seen in "wgate-status" as the "Capacity" of the AGate.
When running multiprocess Agates the number is retrieved from the MManager and also involves the number of agate-processes.
The WGate dispatches the load in proportion depending on these capacity numbers.
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SIP load balancing issue with ACE 4710

SIP Load balancing Issue with ACE 4710
I have a Cisco ace 4710 with vesion Version A4(2.2). i configued simple SIP load balancing first without stickiness. without stikeiness we are having a problem because bye packet at the was not going to the same server all the time that left our port in used even though user hang up the phone. its happen randmly. i have a total 20 licenced ports and its fill out very quickly. so i dicided to use the stickiness with call-ID but still same issue. below is the config
rserver host CIN-VOX-31
ip address 172.20.130.31
inservice
rserver host CIN-VOX-32
ip address 172.20.130.32
inservice
serverfarm host CIN-VOX
probe SIP-5060
rserver CIN-VOX-31
    inservice
rserver CIN-VOX-32
    inservice
sticky sip-header Call-ID VOX_SIP_GROUP
timeout 1
timeout activeconns
replicate sticky
serverfarm CIN-VOX
class-map match-all CIN_VOX_L4_CLASS
2 match virtual-address 172.22.12.30 any
class-map match-all CIN_VOX_SIP_L4_CLASS
2 match virtual-address 172.22.12.30 udp eq sip
policy-map type loadbalance sip first-match CIN_VOX_LB_SIP_POLICY
class class-default
    sticky-serverfarm VOX_SIP_GROUP
policy-map multi-match GLOBAL_DMZ_POLICY
   class CIN_VOX_SIP_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
class CIN_VOX_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
interface vlan 20
description VIP_DMZ_VLAN
ip address 172.22.12.4 255.255.255.192
alias 172.22.12.3 255.255.255.192
peer ip address 172.22.12.5 255.255.255.192
access-group input PERMIT-ANY-LB
service-policy input GLOBAL_DMZ_POLICY
could you please help me on this...
thanks
Rakesh Patel

I mean there should be one more statement-
class-map type sip loadbalance match-any CIN_VOX_LB_SIP_POLICY
match sip header Call_ID header-value sip:
and that will be called under-
policy-map multi-match GLOBAL_DMZ_POLICY
   class CIN_VOX_SIP_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
is that missing in your config ?

How to configure the database monitoring (DBA Cockpit) after Support pack

Hi,
I did the Support Pack Upgrade for BW system and i ran SGEN as well, now i need to configure the database , could you please suggest how to configure the database monitoring (DBA Cockpit) after Support Pack Upgrade.
Server is MSSQL , Component is SAP NetWeaver 2004s and OS is Windows NT.
Plesae suggest.
Chandu.

Hi,
You are right. SAP delivers this functionality from SP-12. So when you have applied the SP-12, you must have done these config steps to enable the DBA Cockpit.
If you have done these steps earlier, So you must have DBA Cockpit enable right now and putting extra SPs like 13, 14 and so on, should not be a matter.
Now if you have not performed those config steps before, Please do them now and you will be able to use DBA cockpit.
Please understand that SP12 is the base to run DBA Cockpit.
With Regards,
Saurabh

Issues with POWL action buttons and row selection after Support Packs

We recently applied ECC 603 Support Stack 16 to our environment and are having problems with some SAP standard POWL lists (example is KYKOP-OPS-MM-PO-W: Purchase Orders for Goods Receipt). In fact all of the POWL lists that we are using are behaving the same way. There are 2 changes that have happened after moving to this stack.
1. In order to select a row in the list, we now have to press ctrl + click, previously, just clicking the the row would select it and fire the OnLeadSelection
2. All of the Action Buttons in the POWL lists are disabled.
I have debugged the Feeder Class /KYK/CL_MM_FEEDER_PO and see in th GetActions method and see that the ls_actions-enabled is getting set to true, but for some reason the buttons are disabled when the list is rendered.
I've checked a side-effects report from OSS and have come up empty handed. Has anyone else run into this?
Eric

I have found an OSS note that addresses this problem. This problem will effect anyone who is using ALV for ABAP WebDynpro after applying BASIS Support Pack 20 for 7.0. The OSS note is 1363334. Question Answered.

CSS11500 Load Balancing issue

Hi all,
I using the CSS 11500 sg0750004 (07.50.0.04) to balacing requests between two web application servers, but the after applied the configurations, the balancing requests don't occurs as expect, see the configuration applied:
service SAPSRV1_8000
ip address 192.215.13.44
protocol tcp
keepalive method get
keepalive type tcp
keepalive port 8000
keepalive frequency 30
port 8000
string sapsrv1
active
service SAPSRV2_8000
ip address 192.215.13.45
protocol tcp
keepalive method get
keepalive type tcp
keepalive port 8000
keepalive frequency 30
port 8000
string sapsrv2
active
content SAPSRVS_8000
    add service SAPSRV1_8000
    add service SAPSRV2_8000
    vip address 192.215.13.40
    advanced-balance cookies
    string process-length 7
    no persistent
    protocol tcp
    port 8000
    url "/*"
    string prefix "sap-hostid="
    string range 1 to 1999
    active
group SAPSRV1_SAPSRV2Servers
add destination service SAPSRV1_8000
add destination service SAPSRV2_8000
vip address 192.215.13.40
active
So, the VIP Address is exclusively to the group service and the tcp port also is exclusively.
Could you please assist me, why the load balancing doesn't running correctly?
Case need more information, please let me know.
Thank you in advanced.
Sergio Lima

Hello Sergio,
Can you please elaborate on the issues you are experiencing? When you mention the VIP is not working as expected is that due to the fact that the connection simply hangs? Is the CSS actually balancing the inbound traffic? Or is it successfully balancing the traffic, but not maintaining session persistence based on the server-side cookie? Do you know if the session cookie will be embedded within the HTTP header or the URL string? If you are unsure you can always change the "advanced-balance" method to "cookie-url". Can you ping the VIP address?
Also, can you confirm that the server-side cookie should be located directly after the following name "sap-hostid="?
Ex:
sap-hostid=sapsrv1
The reason why I ask is you do not have a string skip-length defined so the CSS will attempt to locate the server-side cookie string after the prefix.
Also, have you verified the services have passed their keep-alive check? This can be performed by running the following command:
show service-summary
Both of the services should "alive" on their keep-alive check.
Also, on your service configuration you do not require the "keepalive method get" command since the services are setup to perform a tcp socket connection for their keep-alive check and not a keepalive type of http to a URI page.
service SAPSRV1_8000
ip address 192.215.13.44
protocol tcp
keepalive type tcp
keepalive port 8000
keepalive frequency 30
port 8000
string sapsrv1
active
service SAPSRV2_8000
ip address 192.215.13.45
protocol tcp
keepalive type tcp
keepalive port 8000
keepalive frequency 30
port 8000
string sapsrv2
active
Also, based on the service and content rule configuration it would seem as though your CSS has been deployed in Bridged Mode (single Circuit VLAN). That being said, the Group Rule will allow users from the 192.215.13.0/24 network to establish a port 8000 connection to the 192.215.13.40 VIP. However, please be advised external clients establishing a connection to the 192.215.13.40 VIP will "appear" as the .40 VIP address within the destination server logs. The CSS will SNAT the inbound client traffic and masquerade their true source address as the VIP. Unfortunately, the CSS does not support the X-Forwarded-For HTTP header option. However, this can be bypassed through the use of ACLs on the CSS.
- Jason

RV042, Load Balance issue

Hello,
I'm a newbie to routers and on this discussion.
I've purchased a Linksys RV042 hoping I could connect my two ISP.
Both of them are 1/1 Mb, first is DSL second PPPoE connection.
The problem is that on system summary page it doesn't show me that second WAN is connected. Even when I trying to manually connect to Internet it doesn't help.
When this connection is in Load balance Mode, internet is very slow, sometimes it's even disconnected.
My question is:
How to configure Load Balance properly?
I've tried this page:
http://www.cisco.com/en/US/products/ps9923/products_qanda_item09186a0080a36632.shtml
but it didn't helped.
Or maybe it's just a demo of this option and doesn't work at all?
Thanks for the reply.....

Eliviszopa,
Hi. My name is Tiya and I am one of the Cisco SMB Support Engineers. I have been eyeing your post and I would like to add a few recommendations.
From what I've gathered, you are having an initial problem with your Dual-WAN configuration, in that you are unable to have both WAN interfaces Live at the same time. I will list a few things that will help you in determining if there is an issue with your RV042's Dual-WAN configuration and connectivity.
I understand your Network Topology to be: [ISP Modem 1 & ISP Modem 2]---->RV042---->LAN Clients (PC).
First thing, we need to ensure your router it at the most current firmware version for optimal performance. The RV042 series routers are currently in their 3rd HW revision, so we also need to ensure we download the firmware that is compatible with the HW version of your RV042
To locate HW version:
Look on the bottom of your RV042.
You will find the Serial Number and MAC      address sticker.
The HW Version will be visible by the      Model Number on that sticker.
Image below has a Red Square around the      Model Number and HW version of an older RV042 as a reference. HW is indicated      with 'v' and rational number, i.e. v1.1, v2.0. Your sticker may look      slightly different, but the content will be the same:
Now that we are certain of the HW version, check the release notes below to check the best firmware version for your RV042. I have provided a link below to the RV042 Release Notes:
Firmware v 4.0.0.7 Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv0xx/release/rv0xx_rn_v4-0-0-7.pdf
Firmware v 1.3312.19-tm Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv042/release/notes/RV042_RN_v1-3-12-19-tm.pdf
If your RV042 is using neither of the 2 firmwares, follow this link to download the correct version for your router:
http://www.cisco.com/cisco/software/type.html?mdfid=282414010&flowid=784
I would recommend you download and      'flash' your RV042 with the current compatible version of firmware to      address the possibility of software corruption.
Now, we need to reset your RV042 to factory defaults to remove any parameters previously configured and also, in essence, clear the router's memory so that we can start afresh. When this happens, your RV042 will return all settings to their default state; in other words, it will be as if you are pulling it out of the box for a new install. To do this:
Disconnect the RV042 from your network,      so that the only item the RV042 is only connected to the power outlet.
Locate the reset button on your RV042.      This will be on the front of your router and it will be recessed a bit.
Use a small tipped item; paperclips      usually work best, to hold down the reset button for 30 secs. Anytime less      will not guarantee a full reset to factory defaults.
Connect your RV042 to your PC. After      about 30 secs, ensure that you have an IP address of 192.168.1.100 on your      PC.
Now, let's test each WAN port with each of your ISP connections.
The next few steps will take us through a process that will ensure both WAN ports are working, and ultimately will help is in determining your Dual-WAN connectivity performance.
Connect one of your DSL modems to WAN1 and configure the WAN1 interface accordingly:
· DSL connections typically are UN-bridged by default; where you will see the modem is performing NAT. You will use DHCP as the WAN tupe for UN-bridged DSL connection types. This UN-bridged state can be recognized quickly in a couple of ways.
o    There is a PRIVATE IP address displayed as the WAN1 IP address, e.g. 192.168.x.x. where X is a number 0-254, 10.x.x.x where X is a number 0-254, or less commonly, 172.16.x.x where X is a number 0-254.
o    When connecting to the modem directly to your PC, you are able to reach the Internet.
o    If your DSL connection is UN-bridged, you must make sure the LAN IP Subnet of your Modem and Router are NOT the same.
o    Again, you will use DHCP as the WAN type for UN-bridged DSL connection types.
· DSL connection that is Bridged will require a PPPoE Username AND Password. This PPPoE username and password will be entered on the RV042 under the WAN type PPPoE. PPPoE connections can be quickly recognized in the same manner:
o    There is a PUBLIC IP address displayed as the WAN1 IP address AFTER correctly configuring WAN interface to use PPPoE and using correct UN/PW.
o    You are NOT able to reach the Internet when connecting your PC directly to your RV042.
· Contact your ISP to assist you in determining the bridged state of your modem to be absolutely certain.
2.     After you have properly configured WAN1 and confirmed Internet connection, configure WAN2 in the same fashion.
3.     Change Primary WAN to WAN2 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN2 (change this option)
4.     Disconnect DSL Modem from WAN1 and connect to WAN2.
5.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
6.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
7.     After about 30-60 secs, test for Internet connectivity.
Now we will do the same for your other ISP connection.
1.     Disconnect all devices from the RV042, save your PC.
2.     Change Primary WAN to WAN1 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN1 (change this option)
3.     Connect 2nd ISP connection to WAN1 and configure according to Modem configuration, either DHCP or PPPoE.
4.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
5.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
6.     After about 30-60 secs, test for Internet connectivity.
7.     Do the same for WAN2 using your 2nd ISP connection
At this point, we should now know for certain if both WAN Interfaces will allow Internet connectivity.
If you have problems with these steps, repost with the steps you took and the results.
If things are OK, then we will continue with configuring the router for Load Balance Mode:
1.     Navigate to System Management>Dual-WAN and change your selection from Smart-Link Backup to Load balance
2.     Configure both WAN1 and WAN2 with the configuration that correlates to the Modem connection it will receive.
3.     Connect both Modems to the correct WAN port on the RV042.
4.     Power cycle all devices; Both Modems, RV042, and PC
5.     Navigate to RV042 management page and check to see if there are IP addresses for WAN1 & WAN2 Interfaces.
If you have problems with these steps, repost with the steps you took and the results. Let us know your results.

ESS benefits and payment not displaying after support pack update

Hi All,
After the latest HR support pack update ESS benefits and payment not displaying
SAP ECC 604 EPH5
SAP_ABA 702
SAP Kernel : 720_EXT_REL
Kernel Patch number : 439
Netweaver portal version - 7.30
please help
Regards
Rahul

Hi Siddharth & Jwala,
the issue got fixed, by changing the order of Payment above the Benefits
1. i made some options to be disabled & enabled in both benefits and payment
2. Then in the portal i could see the benefits and payment
3. inside the benefits & payment i was able to see two option 1 is for benefits & other is for payment
4. we only wanted payment functionality to be displaying
5. so i tried to hide the benefits then noting was getting displayed in the portal
6. finally i changed the order of the payment just above the benefits
then then i was able to see the benefits and payment inside that i was able to see the payment where i was able to see the payslip
i am not sure what i have done but i is working but please let me know what the problem was actually
Regards
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CSS load balancing issue

Hi,
I'm facing a problem with CSS while load balaning for the web application with two servers.
The application is based on activex..
Basically I have two servers running web application for which I have created VIP in the CSS, user hits the VIP address and they access the application, also we use the sticky thing as the application requires the session persistence.. everything is fine, but the problem starts when one of the server fails...
Assume a user hits the VIP address and access the application, due to the sticky thing his session will be with server A (for eg.), now suddenly the server A fails and in that time the user was doing a transcation and inputting some data and after that he press the submit button on the page, as the server A is down the web page gets refreshed and he has to relogin to the application and redo the whole thing what he was doing in that particular transcation...
Now the application guys are telling this problem should not happen as the CSS should be able to take care of the session getting reestablished to the other server B during the server A failure...
Can someone through some lights on this... I'm bit confused now... as what I understand is that the webpage gets refreshed during a server failure because the tcp session id will get changed and the server B will not accept the same tcp session so it reinitiates the new session...
Is my understanding right?? or is there something which we can do on the CSS to avoid this problem...
Regards
Vijay.

Hi Gilles,
Thanks for the clarification.
I have two more issues too...
1. The load balancing of the application between the two servers are not even. Actually the traffic from the users keep hitting only one server, I understand the point of sticky method used in our case, but even atleast the connection from another client machine should go to the other server,but it is not the case... traffic from all the clients goes to only one server..
what could be the possible reason for the same...
My config is as below...
service SERVER-1
port 80
protocol tcp
keepalive port 80
keepalive type tcp
redundant-index 4
ip address 10.6.223.87
active
service SERVER-2
port 80
protocol tcp
keepalive port 80
keepalive type tcp
ip address 10.6.223.77
redundant-index 5
active
owner WEB
content WEB
add service SERVER-1
add service SERVER-2
redundant-index 104
vip address 10.6.223.78
protocol tcp
port 80
url "/webretrieve*"
advanced-balance sticky-srcip
active
2. Slow response of the application when users access application through VIP address(CSS), what can be done further in the configuration to improve the performance?? or any thing else I can do...
Regards

Load Balancing Issues SOMEBODY HELP ME!!

Good Morning.
A few days ago we implemented Load Balancing in our company, I printed a step by step procedure from MS and just follow it thinking that once I did that everything was going to be ok, but I am some issues that I managed to fix, but now I am stock in one
that I just can't figure it out, here I go.
When regular users try to connect to the Farm using the external IP they can't connect, we checked firewall seems to be ok, we check the configuration we did and we didn't miss any step, NOW here is the crazy part, when we use our Admin ID we can connect,
so I thought maybe is an Active Directory thing, but I don't know where to look or what to do so my questions are,
Can this be a licensing issue?
Do I have to have my TSBroker as part of my group of PC in the firewall?
Can it be a certificate issue? (not too sure because I can connect as an admin)
Can it be permissions to log in to the servers?
My co-worked is telling me now that if TS Broker sent them to TS1 they can connect but if TSBroker send them to the other two members of the farms they can't connect, TS1 is the original TS before this whole Load Balancing thing.
we tried so many solutions that we can find online and come up with and nothing seems to be working, so what do I do? What did I do wrong when I configure the Load balancing? is there any step beside what MS told me that I am missing...
PLEASE HELP!!
Thank you..

Hi Rodrigo,
Thank you for posting in Windows Server Forum.
What’s your server OS in your environment?
Firstly see that, if you have not set up RD Licensing server and don’t have RDS CAL then your administrator can only get access for RDP connection (only 2 connection for Admin purpose). Now if you want more than 2 connection you need to setup RD Licensing server,
activate it, purchase RDS CAL and install it. After installing, you need to see that your user have enough permission to access RDS server and your user must be added under “Remote Desktop User” local group under RDS Server.
As you have commented that your admin can able to connect so I think you must have the issue with user permission, please go through above points and check the result.
Please check below article for more details.
1. TS Session Broker Load Balancing Step-by-Step Guide (Server 2008)
2. Checklist: Create a Load-Balanced RD Session Host Server Farm by Using RD Connection Broker (Server 2008 R2)
Hope it helps!
Thanks.
Dharmesh Solanki

OSB Load balancing issue

We have a situation in our project.
We have weblogic8 sp5 server having a MDB deployed which consumes messages from distributed queues created on WLS8. OSB business services post messages on these distributed destinations.
Set up:
Non production environements have 2 instances of wls8 servers and 2 instances of OSB(weblogic) servers.
Production environments have 4 instances of wls8 managed servers and 2 instances of OSB(weblogic) servers.
Weblogic 8 server has a custer created with only hostname comma seperated. e.g. host1,host2.
OSB(weblogic) server has cluster created with hostname and port comma seperated. e.g. host1:port,host2:port.
Scenario 1.
When wls8 cluster address is used in OSB business services, load balancing is not happening. Messages go on only one of the wls8 managed server. If this server goes down,then only messages goes on the other server. With this, we have got fail over and not load balancing.
Scenario 2.
When wls 8 managed server urls are used with comma seperated in OSB business service, some times load balancing happens. This is also not conclusive as when any of the wls8 managed server goes down and comes up, load balancing stops working and all the messages goes to one of the up servers.
Scenario 3.
On produciton environmet, we have 4 instances of wls8 managed servers and 2 instances of OSB(weblogic) managed servers.
As discussed in scenario1, when cluster address is used, load balancing does not happen and all the messages go to 1 of the 4 managed servers. When comma seperated urls are used, some times load balancing happenes but it is load balanced in 2 of the wls8 managed servers. Other 2 do not get any messages.
We have custom error handling done to catch all the errors occured when any exceptions occurs in proxy service or while invoking business service. Tried adding 4 different urls in end point uri of busness services. If any of the endpoint is down, it gives an error and message flow gets aborted. Tried with enabling retry count. With this, when any endpoint down, it raises an error which is collected in custom error collector and then tries with another available uri. With this, for any error and after successful message flow, an error is logged.
Any pointers on above points will be helpful to solve our loadbalncing issue.
Regards,
Pravin
Edited by: pravinkapile on Oct 11, 2009 10:03 PM

Pravin,
I doubt affinity to Server is somehow configured on the connection factory? Can you please check connection factory configuration?
Manoj
http://download.oracle.com/docs/cd/E12840_01/wls/docs103/wlsmbeanref/core/index.html (JMSConnectionFactoryBean)
Overview
The load-balancing parameters allow client to choose how they wish to distribute the work to the configured servers.
Attributes
This section describes the following attributes:
* LoadBalancingEnabled
* ServerAffinityEnabled
LoadBalancingEnabled
Specifies whether non-anonymous producers created through a connection factory are load balanced within a distributed destination on a per-call basis.
If enabled, the associated message producers are load balanced on every send() or publish() .
If disabled, the associated message producers are load balanced on the first send() or publish().
Privileges     Read/Write
Type     boolean
Default Value     true
ServerAffinityEnabled
Specifies whether a server instance that is load balancing consumers or producers across multiple members destinations of a distributed destination, will first attempt to load balance across any other physical destinations that are also running on the same server instance.
Privileges     Read/Write
Type     boolean
Default Value     true
Edited by: mneelapu on Oct 12, 2009 11:16 AM

Server Load balancing issues

the servers are loadbalancing between the switches '3'
and '2' and the link between the two switches is blocked.
This link was forwarding before and thus any traffic going to the server was
send to the Servers correctly no matter on which switch they are active.
However after addition of another link in between the switches 'root'
and '1', the path cost to the root has decreased and thus the link
between the '2' and '3' is Blocking and the other link between
the '2' and '1' is Forwarding as it should be ideally. But
this would be creating an issue because the trafic coming from outside i.e.
through switch '1' to the server will be correctly send to the
server if the server NIC is active on the '3' because the Virtual MAC
addresses are binded accordinlgy. In case the server falls onto the other
NIC which is on the '2' the traffic won't be able to pass because the
MAC address is not binded on the trunk connecting the switches '1'
and '2'. This binding cannot be done because the same MAC address is
being learned on the another trunk on the '1' which is connecting
to 'root'. So if we bind the same Virtual MAC on two trunks on the same
switch ('1') then this will cause MAC Address Flapping on the
switch and hence canot be done.
In another case,we can able to bind virtuak MAC on two trunks on the same
switch('1') and it's working fine.
The servers are load balancing in round robin fashion. each server has 2 NICs and work in Active-Passive mode. The servers load balance each other when all their active links are connected to '3' switch but when two of the active NICs of two servers are connected to '3' and the rest of the two active NICs from the other two servers are connected to '2' switch then only the forst 2 servers load balance and the other 2 servers do not load balance.
Please help.
Thanks in advance.

In my experience, server load balancing is one of the most difficult things to get going properly in a switched LAN environment. Switched LANs are designed so that one MAC address can only be bound to one switch port. Therefore, if you have two NICs with the same MAC address (real or virtual), then you will get flapping somewhere.
I have seen various ways that the manufacturers try to get around this limitation of switched LANs. For example, one technique I have seen, practiced by ISA Server, is to use a multicast MAC address for the service so that frames go to both exit ports. But that does not always work well unless you tweak the network to acommodate it.
What sort of servers are they, and what system is used for the load balancing?
Kevin Dorrell
Luxembourg

BI Load Balancing issue after support pack up grade

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