OS & Application Server Layout

Coming from an older NetWeaver landscape, which platforms did S/4HANA 1809 drop support for?

Why is it good practice to host the transport area on the production server?

What are the five subdirectories under an instance directory in /usr/sap/SID?

Why is the transport directory (/usr/sap/trans) different from all other SAP directories?

How are the ICM web ports defined, and what numbers are commonly used?

On Windows, how are SAP files referenced instead of /sapmnt and /usr/sap, and what two shares are created?

How does instance startup on Windows differ from Linux/UNIX regarding sapstart?

On every Windows application server, which SAP user must be a Local Administrators member — and which must not?

What's the port pattern for the dispatcher, gateway, and message server on instance XX?

On Linux/UNIX, what happens to the sapstart program after it launches the instance processes?

What two OS users does a Windows SAP system have, and how does that differ from Linux?

On Linux/UNIX, which OS user owns the SAP directories, and which separate user belongs to the Host Agent?

Why should you avoid instance number 89 for SAP on Windows?

Which kernel service starts instance processes, and how is it accessed?

Which operating systems does the SAP S/4HANA application server run on?

On Linux/UNIX, what's the difference between the /sapmnt/SID and /usr/sap/SID top nodes?

What are the three subdirectories of /sapmnt/SID?

Why is the nuc subdirectory of exe empty on an S/4HANA system?

Why does each instance keep a local copy of the kernel, and what keeps it in sync after an upgrade?

What does the /usr/sap/SID/SYS directory actually contain?

What do the <sid>adm navigation aliases cdDi, cdAS, cdexe, cdglo, and cdpro jump to?

When a transport request is released, what two files are created and what does each hold?

What do the transport-area subdirectories actlog, buffer, and EPS hold?

What does the SAP Host Agent do, and why does its directory have no SID?

What are the two OS groups SAP installs, and what's each for?

Why is icmbnd normally the only SAP kernel program run as root on a HANA-based system?

How do SAP Start Service ports differ from SAP Host Agent ports?

Why can SAP port numbers collide with other applications on the same server?

Which Windows versions and editions does S/4HANA 2022 support?

On Windows, how does an instance know its global vs local host, and what's missing compared to Linux?

When is a Windows domain installation required rather than a local one?