Reorging Endevor VSAM files can be a challenge if Endevor is up 24x7.
It is difficult to find a time to get exclusive rights to the files.
There is a document listing LServ and RLS differences.
The main deterrent to using RLS is the requirement of an Endevor shutdown for file reorgs.
Is it possible to reorg Endevor VSAM files using L-Serv while Endevor is active?
Endevor r18.0 active 24 X 7 used in a z/OS environment.
The LDMAMS Utility is described in the CA Common Services for z/OS wiki for both r14.1 and r15.0