Regarding RFC load balancing

Hi
Can any one tell me what is RFC load balancing in xi
and send me if you have any document.
thanks&regards
venkat.

Hi,
Load balancing is a key feature for ensuring SMP scalability. XI makes use of load balancing by using multiple Web AS instances. In XI, load balancing is especially useful in inbound request processing. You can use outbound load balancing if the receiver application or component is prepared for and can benefit from load balancing (for example, a receiving IDoc or RFC application is addressed using its message server to distribute the load).
Refer this article
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/0f00c890-0201-0010-beb2-c96050edc426
http://help.sap.com/bp_bpmv130/Documentation/Operation/TuningGuide.pdf
and also refer these blogs
Performance Tuning Checks in SAP Exchange Infrastructure(XI): Part-III
RFC Quota Part 2
Configuring SLD in Sneak Preview SAP NetWeaver '04 Sneak
Delayed XI Message Processing
Quick Sizer - Getting started
WebServices: A real world implementation experience
Regards
Suryanarayana

Similar Messages

Regarding ACE load balancing

Hi,
I have one server application with two physical servers clustered with one virtual IP address . I have total six ip addresses for one server : details are given below
Cluster IP’s :
Node 1 :
NIC 1 : 10.10.x.x : physical IP address
NIC 2 : 172.16.x.x : heartbeat address used in between server
Node 2 :
NIC 1 : 10.10.x.x : physical ip address
NIC 2 : 172.16.x.x : heartbeat address used in between server
Cluster IP : 10.10.x.x : clustered IP address used to access server
SQL IP : 10.10.x.x : clustered IP address used to access SQL application .
now i want to achieve server load-balancing using ACE module. Please suggest to me fulfil this requirement. how to do this ?
whether i need to remove the virtual IP and directly bind two physical ip to ace virtual ip add.
How do i check ace server load-balancing configuration with live server .... do we have any tool to check the packet behaviour to confirm that load-balancing is happening properly in between two physical servers :
Please guide me and share the knowledge .....................

Hi Vinod,
You are correct. In order to achieve load-balancing with an ACE blade, you need to configure the addresses of the two severs separately. If you look at the documentation page on cisco.com for ACE (http://www.cisco.com/en/US/products/ps6906/tsd_products_support_model_home.html) you will find sample configuration for the most commont topologies.
As for how to verify if the load-balancing is working correctly, you can use the command "show serverfarm ", which will list you all the servers in a serverfarm, along with the current and total connection numbers for each of them.

Load balancing by RZ12 Serger Groups

Hi.
I'm trying to get some knowledge about this subject for my prod. BI system. Maybe some of you, almighty masters of SAP administration (standard flattering), could give me a hand
Here's the situation: We've a BI system (NW 7.0 ehp1) with 4 servers ( CI + 3 appl.serv). We've defined both a server group (RZ12) and a logon group (SMLG), with the same name, for bw load purposes. That means mostly background and dialog processes, with less number of end-user logons, so I'm focusing in the Server Group configuration.
Now, the problem: Basically, the number of processes are not properly balanced. Servers 1 and 2 get about the 80% of the work, while other two, 3 and 4 just the other 20%.
I've been reading and investigating but most of the documentation refeers to the logon group load balancing algorithms in SMLG, by the setting of group-dependnet atribute "Ext. RFC-enabled", with it's corresponding "Fab.Typ" algorithm
What i want to know if it's there's a way to know that balancing algorithm/method it's being used in RZ12 rfc server groups, and how can I verify and even modify that behaviour.
I've been checking this notes:
Note 593058 - New RFC load balancing procedure
Note 1508504 - Load balancing in background processing
Also:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/a4/db833d4c47ea4ea1a9b7af3c535ff2/content.htm
Any suggestion or informacion will be gladly wellcomed. Dont hesitate in requesting me more detailed information.
Thanks in advance and regards.
Armando.

Hi,
Are you using load balancing in RFC connections as well ?
Thanks
Sunny

Software load balancer

Hi,
os platform= oracle linux
database = 11g 11.1.0.7
apps = 12.1.2
regarding choosing load balancer which load balancer is good for Ebusiness suite instance
Hardware level or software level
kibndly advice

If we want to go with hardware level do we have to do something with Apache loadbalancer or skip that step?Which configuration you are planning to go with? You still need to do configuration changes at the application tier nodes.
If we choose Hardware level load balancer its configuration has few steps compare to software level ?Going with hardware load balancer still requires many changes and configurations at the application tier nodes as well as the hardware load balancer and I would say the steps are not less comparing to software load balancer.
what is the major difference between hardware level and software levelI believe this is not answered in any of the docs/links referenced above, so please log a SR to get the correct/proper answer.
Thanks,
Hussein

BizTalk 2010 Load Balancing Not So Balanced

Ok here's our scenario.
1. One Orchestration running under HostInstanceProcess on 3 servers in the same Groupe using 3 different domain accounts
2. That Orchestration has a reference to Utilities dll, which in turns calls a stored procedure using ADO.net code
3. We run that orchestration, it gets around 2000 de-batched messages and for those 2000 messages it calls that ADO.net code
4. Back in that database we run sp_who to check how many connections are made from each machine, and we find that over 60% connections are always made from one particular BizTalk machine and it's not one off, I've seen it atleast 7 to 8 times, that machine
always has most number of connections, for example if there are 120 connections in total, 80 connections are from Server 1 while rest from others.
5. We put a Max Pool connections in the connection string to 250 (default is 100) but that doesn't make any difference.
6. This interface is facing a lot of connection time outs from the database, hence this investigation is done
7. The same interface works perfectly fine on BizTalk 2006 R2, it's connecting to the same database (so can't be a database issue), it has 2 servers, which make almost same number of connections to the DB when I check with sp_who, so load balancing seems
to working as expected in BizTalk 2006 R2.
So my question, I know BizTalk is supposed to do load balancing in a round robin fashion which should equally distribute the load but in my example in BizTalk 2010, it's not doing that clearly, it's overloading one server with almost 70% of the requests,
what could be the reason for this? Host instances are set-up similarly in all servers. Any help greatly appreciated.
Regards
Syed

BizTalk load balancing works in Round Robin fashion only for the new messages, while in case of instance subscription message will be routed to server holding dehydrated orchestration instance.
So the server having dehydrated instances will receive the correlated response along with the new incoming message.
So you can see one server slightly overloaded.
Thanks,
Prashant
Please mark this post accordingly if it answers your query or is helpful.

WLC 7.5.102.0 Client Load Balancing

Hi,
Regarding 'Client Load Balancing' feature in WLC code 7.5.102.0, which one will take precedence:
- Load Balancing enabled in RF Profile and applied in an AP Group.
- Load Balancing enabled in WLAN
Also, is there any way to determine the statistics of the Load Balancing in RF Profile? (similar to the Statistics for Client Load Balancing enabled per WLAN in Wireless> Advanced > Load Balancing > Load Balancing Statistics)
Thanks in advance!
- edison

RF Profiles overrides any global settings, just like AP Groups can override the vlan or interface mappings.
say for example, I want to leverage the RF Profile for highly dense deploytment (like Town Hall or influx of users) and as result i want to deploy more temp APs that will coexist my existing APs. I just want to modify the High Density parameter - limiting the max clients only. but the RF Profile comes with the Load Balancing too and i don't think it cannot be disabled separately.
> Load balacing is enabled on the WLAN and isn't in the RF Profile. High Desnity, you create a RF Profile to disable the lower data rates, maybe 54 and 36 as mandatory and 24 and or 48 supported... depends on how much you want to shrink your cells. Also setting the max and min TX power.... no need for load balancing if you shrink the cells down.
so when i apply the RF Profile to the AP Group, the profile's Load Balancing settings will also be applied together with my preferred High Density settings - while my WLAN settting is not enabled with Load Balancing.
> No.... you either enable load balancing on the WLAN or not. The screen shot I showed you is a threshold configuration if its enabled.
Thanks,
Scott
*****Help out other by using the rating system and marking answered questions as "Answered"*****

LOAD BALANCE BEHAVIOR FOR 7600 ON ETHERCHANNELS

Hi Everyone,
Currently I'm planning to implement ether-channels on 7600 routers, but there's something that's still not clear to me, regarding the load balancing behavior, for L2VPN and L3VPN.
I've read that 7600 in MPLS default load balance behavior is to take the SIP and DIP if present and the bottom of the stack label or the 5th label depending upon the number of labels on the stack. In l2VPN scenarios when ether-channel is used, if no IP traffic is present what is the default behavior of the etherchannel to calculate the load balancing hash function to select a given link on the bundle.
I'll appreciate any feedback regarding this.

Hi Louis, you could set default routes on the ASA's with tracking, and use ospf downstream to inject the default route in to the network with default information originate - this will only advertise out a default route if it has it in the routing table. With SLA you can track internet reachability by IP SLA echo to something like 8.8.8.8. Both sides can advertise this in to the network, if one goes then there is one left. Just be mindful of the policies and NAT required, you will have to duplicate the rules on the ASA's. With the NAT you have to ensure, that outgoing traffic comes back in the same path it left so it doesn't break connections.

Reverse proxy plugin vs load balancer plugin

Hi,
May i know what is the differents between reverse proxy plugin(passthrough) and load balancer plugin?
Regards
haw_9368

The Load Balancer plugin was designed specifcally to allow the Web Server to be a HTTP end-point for Sun Application Server. It is an ancestor of the Reverse Proxy Plugin (generally this version was changed to be tolerant of HTTP from any origin server, and performance improvements, etc). This plugin further evolved and was integrated into Web Server 7.0.

RFC Sender (XI 3.0, SP14) Load Balancing doesn't work

Hi all,
We're "desperately" trying to use the Load Balancing option of RFC Sender Adapter (XI 3.0, SP14). It doesn't work.
The Adapter can not register to the sender SAP server. But when we do not use the "Load Balancing" option, everything works well.
We did follow the XI guidelines step-by-step. All necessary configurations in XI and in SAP sender system (TA: SM59) are "properly" done and reviewed by different experts several times.
Do you have, by chance any running scenario using "Load Balancing" within a RFC Adapter? If yes, I would appreciate if you can share it with me.
Thanks a lot!
Regards,
Khaled

Hello Khaled,
the RFC sender adapter registers a program at the SAP Gateway. Load Balancing for the Sender Adapter means, that you have at least two J2EE server nodes within your XI installation. On all these server nodes the same RFC sender adapter is started and register the same program at the same gateway. The load balancing is then handled by the gateway. That means, that for the sender adapter the settings are the same, even if you use load balancing or not.
The settings are, e.g.
- SID=ABC
- hostname=abchost (central instance, message server)
- hostname=xyzhost (additional dialog instance of ABC)
- instance nr=00
application server (gateway): xi1host
application server service (gw-service): sapgw00
programm id: could be freely choosen
The Metadata Repository could be connected using load balancing. Here a user need to log on to the system.
The settings here must be:
Message-Server: abchost
Message-Server-Service: sapmsABC
System-ID: ABC
Logon-Group: e.g. PUBLIC; this logon group need to be created in system ABC using transaction SMLG
For the RFC-Receiver Adapter the same settings as for the Metadata could be used.
Keep in mind, that for the RFC Sender Adapter a RFC connection of type T must be created in transaction SM59 in system ABC.
Rgds.,
Andreas

Load balancing and rfc metadata repository in reciever rfc communication ch

hi.
i want to know the purpose of load balancing and rfc meta data repository in RFC communication channel.
and can u send me any examples on this load balancing.
waiting for your response.
bye.
regards.
seeta ram.

Hi Seeta Ram,
Load distribution is handled by the message server (there is one message server in an SAP System). When a user logs on, the message server assigns him or her to the application server that currently has the <b>smallest load</b>.
Well now you can understand that we use load balancing for better performance by distributing the work to different processes to balance or maintain the work load in SAP system.
For more information refer to this link
http://help.sap.com/saphelp_nw04/helpdata/en/28/75153a1a5b4c2de10000000a114084/content.htm
Regards
Sumit Bhutani

Configuring RFC connections for load balancing.

Hi ,
We have the following landscape for our systems.
The database is installed on z/os , db2 (mainframe). The central services( SCS and ASCS) are also on the mainframe. So the message server is on mainframe.
The CI is on AIX and The DI is on AIX.
We have Logon groups configured and load balancing Configured and is RFC enabled.
1) When we connect to SAP using the SAPGUI and the portal connection is made to either CI or DI depending upon the best response times. Now recently we are running the mercury load testing, all the users are connecting to DI. Why are the users connecting to DI even though we have load balancing?
2) I have a system with SID BP0, with one CI and one DI. The logon group is BP0 and the message server name is cyrix. Now I have other another system EP0. I have created a RFC connection from EP0 to BP0. In SM59 I have selected the load balancing option, and provide the message server name, SID and logon group name. The connection does not work. If I connect directly to the CI or DI the connection works. Please tell me how can I configure load balancing for RFC connections.
Thanks
Manmath.

Dear 917996,
There are two types of load balancing:
- Client-side load balancing (setting up the tnsnames.ora on client side). More information here (http://ggsig.blogspot.co.uk/2012/04/client-side-
load-balancing-in-oracle.html). Very good video produced my friend Igor Melnikov is here (http://www.dsvolk.ru/oracle/racdd4d/demos/video/loadbalance/client/clientloadbalance_viewlet_swf.html)
-Server-side load balancing (remote_listener and setting service parameter clb_goal). Very good Igor Melnikov's video is here (http://www.dsvolk.ru/oracle/racdd4d/demos/video/loadbalance/server/serverloadbalance_viewlet_swf.html).
I have read about client side and server side load balancing. By editing tnsnames.ora I have enabled client side load balancing which is suppose to select listeners at random. then why does it only go to second node?Could you please show your tnsnames.ora on client?
Please can anyone help me to configure server side load balancing with SCAN. I have read many many post but couldn't find a clear answer.Based on your output (remote_listener string cmbtrnrac-scan:1521) you have already configured the server side load balancing.
SQL> show parameter listener
NAME TYPE VALUE
listener_networks string
local_listener string (DESCRIPTION=(ADDRESS_LIST=(AD
DRESS=(PROTOCOL=TCP)(HOST=10.1
7.67.214)(PORT=1521))))
remote_listener string cmbtrnrac-scan:1521How many SCANs do you use? Do you use DNS?
regards,
Gennady

Load balancing and RFC problem

Hi!
I have a problem regarding load balancing and RFC's. We use the follow function in librfc32.dll (from VB6) for RFC calls: RfcOpenExt It's working fine no problem, but from now on we will have to use the this funcion due to load balancing: RfcOpenExtV3
The only difference between the two functions is the parameters. RfcOpenExtV3 has 5 additional parameters:
intLoadBalance1, strLbHost1, strLbSysName1, strLbGroup1, intSapGui1
I asked our tech guys for the details so that I can set up the parameters (double check everything) and the RfcOpenExtV3 doesn't working. Return value is zero.
Have somebody faced with this issue before?
Thanks in advance!

Hi,
1. Probably this link may help.
[http://help.sap.com/saphelp_nw04/helpdata/en/22/042f18488911d189490000e829fbbd/content.htm]
Especially see the function parameters on this page,
which are the bottom.
regards,
amit m.

RFC connection (SM59) fails with load balancing enabled.

Hello All,
We have an RFC connection setup between two SAP systems. The RFC connection works fine if it points to the destination system. But if we enable load balancing, the connection fails with this error:
ERROR                partner not reached (host <hostname>, service sapms<SID>)
LOCATION             SAP-Server <source system> on host <host name of source> (wp 1)
DETAIL               NiPConnect2
CALL                 SO_ERROR
COMPONENT            NI (network interface)
COUNTER              3027
ERROR TEXT           Connection refused
ERROR NUMBER         79
MODULE               niuxi.c
LINE                 1069
RETURN CODE          -10
SUBRC                    0
RELEASE              46D
TIME                 Mon Aug 18 18:33:30 2008
VERSION              34
I've checked the /etc/services file, the following entries exist
sapms<SID> 3606/tcp
sapms<SID>s 3600/tcp
lstst at the source system works fine
lgtst -H <target host name> -S sapms<SID>
niping at the target system has a problem
> niping -c -S 3606
Mon Aug 18 10:23:14 2008
connect to server o.k.
ERROR => NiTClientLoop: NiTReadLoop (rc=-6) [nixxtst.cpp 2629]
ERROR       connection to partner broken
TIME        Mon Aug 18 10:23:14 2008
RELEASE     640
COMPONENT   NI (network interface)
VERSION     37
RC          -6
MODULE      niuxi.c
LINE        905
DETAIL      NiPRead (0.0.0.0/0, hdl 1)
SYSTEM CALL recv
COUNTER     1
Please help me figure out the problem.
regards,
Roshni

Hi,
I think you have added wrong port entry in services file.
The entry of sap servers in services file for load balancing are
sapms<SID> 36<instance number>/tcp
so please check once again and add the entry using above formula in services file.
Also add the entry of all SAP servers in your hosts file.
<IP> <HOSTNAME>

TMS RFC using load balancing in HA system

Hello all,
I have configured the TMS in my system (report TMS_MGR_LOADBALANCING) to use load balancing while communicating with the QA and the PROD systems which are HA systems.
By default, the user group SPACE was used for the RFC. Is there a way to change the user group that the RFC uses?
Regards,
Oren

Hi Matt,
Thanks. I did read this note when looking for a way to change the logon group. Since I did not find there any hint how to change it, I thought maybe someone else already found a way without rewriting the report. Appearantly there isn't...
Regards,
Oren

Load balance for HTTP Connection to ABAP System (Type H) RFC connection

Experts,
For proxy we are using HTTP Connection to ABAP System (Connection type H) RFC connection in PI to get connected to ECC. I only see the option to use Target host in the Target system settings than Load balance option. In general ABAP Connection (Connection type 3) has Load balancing status option in Target system settings.
My requirement is I should use a logon group with the message server when PI connects to ECC. How can we achieve this? At the moment I can only use the Central Instance or any dialog server (App server) in RFC but not a logon group.
Thanks in advance.
Mahesh

Hi Naga
Could you check the link below?
http://help.sap.com/saphelp_nwmobile71/helpdata/en/47/c5935087b62d66e10000000a42189c/content.htm
https://service.sap.com/sap/support/notes/1040325

Regarding RFC load balancing

Similar Messages

Maybe you are looking for