Ens.MessageHeader query performance seems to vary widely depending on various WHERE and GROUP BY clauses. What techniques help to manage query time? tune table, Alt query plans, use of indicies, etc.?

What are you trying to do with this that is not accomplished with shared library mapped databases like HSCOMMON?

Nice work!  The Docker version ran perfect. I then tried to install and run it on my local IRIS instance with ZPM and I get the execution error: 

ERROR <Ens>ErrException: <THROW>CreateFolder+9^dc.samba.SambaBusinessOperation.1 *%Exception.PythonException <PYTHON EXCEPTION> 246 <class 'ModuleNotFoundError'>: No module named 'smbclient' -- logged as '-' number - @'    Set sc = ##class(dc.samba.SambaService).CreateFolder(server, port, share, username, password, folder)'

I had run irispip to load smbprotocol, which seemed to run fine:

..\bin\irispip install --target \InterSystems\IRISHealth\python smbprotocol

but the smbclient module still seems to be missing.

What am I missing?

Thanks!!