I am running monetdb with the July2015 service pack on MAC OSX. I have no problem running and connecting to a dbfarm that lives on my MAC. But I want to test a very large data set so have created a dbfarm on a Samsung T1 SSD external drive that is USB connected to my MAC.

I have successfully started monetdbd server and have attached to my dbfarm. I created/released a new database. Yet when I attempt to run mClient it fails. Here is the “get all” command:

rs-btlcj34lt:testMapiSock lcj34$ monetdbd get all /Volumes/Samsung_T1/alt-dbfarm

property value

hostname rs-btlcj34lt.maize.cornell.edu

dbfarm /Volumes/Samsung_T1/alt-dbfarm

status monetdbd[740] 1.7 (Jul2015-SP1) is serving this dbfarm

mserver /Users/lcj34/development/usr/local/monetdb/bin/mserver5

logfile /Volumes/Samsung_T1/alt-dbfarm/merovingian.log

pidfile /Volumes/Samsung_T1/alt-dbfarm/merovingian.pid

sockdir /tmp

port 50000

exittimeout 60

forward proxy

discovery true

discoveryttl 600

control no

passphrase <unknown>

mapisock /tmp/.s.monetdb.50000

controlsock /tmp/.s.merovingian.50000

rs-btlcj34lt:testMapiSock lcj34$

Here is the command line error:

rs-btlcj34lt:alt-dbfarm lcj34$ mclient -u monetdb -d maizeFullGenomeDB

password:

monetdbd: internal error while starting mserver, please refer to the logs

And here is the error from the log file.

2016-01-14 10:33:26 MSG maizeFullGenomeDB[749]: # Visit http://www.monetdb.org/ for further information

2016-01-14 10:33:26 MSG maizeFullGenomeDB[749]: !IOException:mal_mapi.listen:operation failed: binding to UNIX socket file /Volumes/Samsung_T1/alt-dbfarm/maizeFullGenomeDB/.mapi.sock failed: No such file or directory

If I switch back to a dbfarm local to the MAC, it works fine.

Any ideas why I can’t connect to a dbfarm on the external drive? Is there something else that needs to be setup for the socket creation to work?