why sap kernel is having multiple copies in sap ?

[former_member222850]

Dear Experts,

I am confused with the options of sap kernel directories location .

/sapmnt/SID/exe

/usr/sap/SID/DV****00/exe

why we need two copies of kernels ? i am confused because of these . please throw some insights on this

[BJarkowski · Accepted solution]

The /sapmnt/<SID>/exe directory is a central place where the kernel is kept. All application servers of a single SAP system connects there and checks if there is a new version available. This way by updating the kernel files in /sapmnt/<SID>/exe you can update the kernel on each application server. Otherwise, you'd have to do it manually.

A good and detailed explanation can be found here:

https://help.sap.com/SAPhelp_nw73/helpdata/en/27/44f17a26a74a8abfd202c4f5dc9a0f/frameset.htm

[former_member222850 · Accepted solution]

Dear Jarkowski,

Many thanks for the answer . i take this opportunity to pose little deeper .

/usr/sap/SID/SYS/exe/run

/sapmnt/SID/exe

of these two directories which refers what ? i tried creating a file in wither way .. but tis reflecting in both directories.

[BJarkowski · Accepted solution]

Have a look at this picture from SAP. I hope it clarifies how the kernel is structured.