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WWI Server Installation - 3 instances

Dear Team,

Currently we have only 1 WWI server in production system. Now due to increasing the load of reports, we wanted to increase more WWI server and thus wanted to add 2 more WWI server for same SAP 'Production System. Requirement is that, when there will be 3 WWI server, the Load Balancing should be done automatically means when e.g. SV001 is busy, then the next report should go to SV002 automatically.

I am aware about installation of Single WWI Server. Also I do have the WWI installation guide with me.

Can anybody guide me how I should do the installation so that, load balancing will happen automatically or what specific steps i need to perform and what additional setting need to do in WWI.INI or SAPRFC.INI so that load balancing will happen automatically.

Kindly Guide.

Thanking You

Regards

Amol

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2 Answers

  • Mar 28, 2013 at 09:05 AM

    Hi Amol,

    The issue is simple. Have the WWI Cookbook handy. First login to localadmin account

    goto txn CGSADM, there u will find one server listed. Click on the icon Install WWI generation server. In the pop up enter the destination for your wwi server as below.( i maintained 3 servers).

    Service name: WWI Server (BP_EH_WWI/ID5/800/02)

    U must have the start parameter as -DBP_EH_WWI_ID5_02 -T5

    File path: C:\WWI\WwiSvcU.EXE

    U have to maintain this data in saprfc file and not in wwi.ini file using local admin account.

    /* this entry points to TCP/IP-Destination WWI_GENPC2 */

    [BP_EH_WWI]

    DEST=BP_EH_WWI

    PROGID=BP_EH_WWI

    TYPE=R

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    PROGRAM=wwirfcsvU.exe

    /* this entry points to TCP/IP-Destination WWI_GENPC3 */

    [BP_EH_WWI]

    DEST=BP_EH_WWI

    PROGID=BP_EH_WWI

    TYPE=R

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    PROGRAM=wwirfcsvU.exe

    At the bottom, make sure u have this data as below

    /* this entry points to TCP/IP-Destination EHS_MANSRV */

    [BP_EH_EHS_MANSRV]

    DEST=BP_EH_EHS_MANSRV

    PROGID=BP_EH_EHS_MANSRV

    TYPE=R

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    MANAGED=1

    PROGRAM=wwirfcsvU.exe

    [BP_EH_WWI_ID5_01]

    DEST=BP_EH_WWI_ID5_01

    TYPE=R

    PROGID=BP_EH_WWI

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    RFC_TRACE=0

    PROGRAM=wwirfcsvU.exe

    DEST=BP_EH_WWI_ID5_02

    TYPE=R

    PROGID=BP_EH_WWI

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    RFC_TRACE=0

    DEST=BP_EH_WWI_ID5_03

    TYPE=R

    PROGID=BP_EH_WWI

    GWHOST=SEASRV05.applexus.com

    GWSERV=sapgw00

    RFC_TRACE=1

    After u have done this, test the server and everything must be up and running.

    U will not have an issue. Attached is a screenshot for your info. let me know if u need further help.

    Regards

    Dhinesh

    Message was edited by: Dhinesh A.P


    cgsadm.JPG (86.0 kB)
    wwi server.JPG (46.8 kB)
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  • Mar 27, 2013 at 07:25 AM

    Dear Amol

    If you followed installation as described in WWI cookbook (e.g. http://de.slideshare.net/shivaprasadd/ehs-wwi-cookbooken)

    there is nothing "special" on the top.

    If you check the above mentioned link (e.g. page 12 of the document) you will find a lot of hints regarding performance, sizing etc. including load balancing

    Same as here:

    http://sapehsgurus.blogspot.de/2012/10/ehs-wwi-generation-server-installation.html

    May be take a look here as well:

    http://ierp.us/sap-spro/sap_configuration_spro_img_search.php?page=-1&SearchBy=text&Filter=Contains&Term=WWI&PerPage=100&modules=%20and%20module_id%20is%20not%20NULL&searchin=All%20modules/sub-menu

    Could be helpful as well

    But there are further options as well. If I remember correct there is a further user exit available which can be used "on the top" to do something "special". Here you can use your "own coding"

    http://www.stechno.net/sap-notes.html?view=sapnote&id=174268

    (check: SAP enhancement C12K0001)

    Hope this helps

    C.B.

    PS: http://scn.sap.com/thread/1496856

    provides a very nice overview of important user exits; very helful for future purposes

    PPS: may be check as well: http://www.stechno.net/sap-notes.html?view=sapnote&id=174268

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    • Former Member

      HI Amol,

      I don't think there are additional settings required in "WWI.INI or SAPRFC.INI", for your demand.

      If you maintain the same RFC destinations for 3 wwi servers, the load will be balanced automatically by wwi monitoring.

      If the load is very less, that will distributed to the first one in the list which is active.

      SAP provideded the Note - 1033594, if you want to distribute the load randomly.

      You can test the same after installing couple,

      deactivate the first one and check how it is picked up by second one. deactivating the second and activate the first.

      If it works fine, the same distribution works - if there is an addtional load.

      Regards

      kamal