message server logno group

how it works

• If you log on using a logon group, the logon is automatically performed using the instance of the group that currently has the best dialog quality. This quality is a key figure that is calculated from the number of users logged on and the average dialog response time.
• To allow the different prerequisites of different instance to be taken into account in this calculation, you can set threshold values for the dialog response time and the number of users yourself. The larger the actual values for response time and the number of users are in comparison to the threshold values set, the lower the quality. These figures apply for the selected instance.
• The values for Response Time and Users are not absolute limits, but rather thresholds. Even if the current value for response time or number of users is higher than this threshold value, it is possible to log on to another instance. The threshold values only influence the calculation of the current logon server of the logon groups.
• You can use a preview to see how the settings of the threshold values can affect the quality calculation, based on the current performance data. Choose test to do this. In a logon group, the instance with the highest quality key figure is always selected for the logon.
• Choose Copy, and save your changes.

from:

http://sap.knowledgehills.com/Logon-Load-Balancing-in-SAP-R-3-Logon-Groups-SMLG-and-CCMS-Configuration-for-Basis-Admins/a21p1

MSCS cluster logs

To get the cluster logs you should use the command "cluster log /g" and
attach the files from "C:\Windows\Cluster\Reports".

sapcpe

sapcpe is an executable replication tool which can be used automatically replicate executables from a central directory to local directories during instance startup for distributed installations.

So far the central executable directory DIR_CT_RUN  has not been used; the instance just starts the local executables from DIR_EXECUTABLE without synchronizing with DIR_CT_RUN.

This way executables of each instance would have to be updated manually if necessary.

To enable executable synchronization extract instance SDK executable archive and demoserver archive to DIR_CT_RUN using SAPCAR:

find out the implementation date of note (snote)

SE10 -> GOTO -> Objects in request

select a clean one set NOTE on the text input and set the number of note like *12345*

FM + tricks

environments

sy-datum = current date

sy-uzeit = current time

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TH_SERVER_LIST = list of servers

TH_SAPREL2 = kernel details

TH_GET_WPINFO = work process list

TH_GET_ACTIVE_SERVER = the server you are currently logged on to
TH_GET_VIRT_SERVER = show virtual server

TH_POPUP = send messages to users

RSLG_ITSAM_READ_SYSLOG_ALV = read syslog

RZL_GET_INST_STATE = instance state (start up date + time)

C_SAPGPARAM = get parameter

SAPTUNE_GET_SUMMARY_STATISTIC = instance statistics (start up date + time)

SALI_MT_GET_TID_BY_NAME = read the MTE information

SALR_MTE_PERF_READ_CUR_VAL = read MTE values

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languages

RSCP0018 = Check profiles for language, character sets and so on

RSCPINST = NLS (Native Language Support) settings

tables

AGR_USERS = table of users