What is SAP Logon Load Balancing

What is SAP Logon Load Balancing? •

SAP R/3 Logon load balancing enables a SAP Basis admin to create various log on groups.

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Logon groups are logical groups of users that can be assigned to one or more SAP instances.

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 A group GroupX !nce !nce assigned to an instance " all users #ho login using that group in the SAP log on pad client #ill automaticall$ login into the instance. "f $ou have t#o instances "% "& then $ou can create t#o groups GroupX and Group' and assign them to "% and "& respectivel$. 'ou 'ou can also divide $our users according to some criterion (such as )loor% thru * #ill use GroupX and floor + thru %, #ill use Group'- and as them to use onl$ those groups. "n SAP Logon Pad $ou can create and delete logon group entries remove instances from groups and delete entire logon groups. hen $ou call transaction S0LG the 110S2 0aintain Logon Groups screen sho#s a table #ith entries for logon groups and the associated instances. An entr$ in this table #hich is characteried b$ an instance and a logon group is no#n as an assignment.  A logon group to #hich multiple instances belong therefore consists of multiple assignments in this table #here an assignment contains one instance in each case.

How to Create a Logon Group or Assigning an Instance to a Logon Group •

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1hoose 110S4 1onfiguration logon Groups or call transaction S0LG. 1hoose (1reate Assignment- and specif$ the desired name of the logon group in the Logon Group input field. 5nter the name of the desired "nstance that is to belong to the logon group. 6he logon group SPA15 is reserved for SAP7 therefore do not use this name.

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Repeat the last step until $ou have entered all instances that are to belong to the logon group.

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'ou 'ou can assign one group to o ne or more instances.

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Save $our changes.

How to Delete a Logon Group or Remoing an Instance !rom a Logon Group •

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1hoose 110S4 1onfiguration 4 Logon Groups or call transaction S0LG. Select an$ assignment for the logon group that $ou #ant to delete or from #hich $ou #ant to remove an instance.

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6o remove an instance from the selected logon group choose Remove "nstance enter the desired instance on the ne8t screen and confirm $our choice b$ choosing (9elete-. 6o delete the desired log on group choose 9elete Group and confirm $our choice b$ choosing (9elete- on the ne8t screen. Save $our changes.

Changing Properties o! an Assignment" a Logon Group" or an Instance •

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1hoose 110S4 1onfiguration 4 Logon Groups or call transaction S0LG. 6o change the properties of an assignment double:clic the assignment and s#itch to the Properties tab page. 'ou can change the follo#ing properties2 "P address of the application server2 !nl$ enter a value in this field if the application server  associated #ith the instance needs to be addressed b$ the front end #ith a different "P address to the one used for application server:internal communication. 6his value applies onl$ for the selected assignment. Settings for e8ternal R)1 call2 'ou can use this indicator to determine #hether logon using an e8ternal R)1 connection is to be permitted. 6his value applies to the selected logon group. 6hreshold values for dialog response time and number of users logged on

How it all wor#s •

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"f $ou log on using a logon group the logon is automaticall$ performed using the instance of the group that currentl$ has the best dialog ;ualit$. 6his ;ualit$ is a e$ figure that is calculated from the number of users logged on and the average dialog response time. 6o allo# the different prere;uisites of different instance to be taen into account in this calculation $ou can set threshold values for the dialog response time and the number of users $ourself. 6he larger  the actual values for response time and the number of users are in comparison to the threshold values set the lo#er the ;ualit$. 6hese figures appl$ for the selected instance. 6he values for Response 6ime and