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Hi David,
Thank you for your speedy response! I have tried the load balancer on basic q processes.
I did the following:
copy the following files to QHOME:
- loadBalancer.q
- service.q
- gateway.q
Next, I defined function qmserve in .bashrc as follows:
qmserve(){ q loadBalancer.q -p 5001 & q service.q -p 5002 & q gateway.q -p 5003 & q -p 5004 & q -p 5005 }and ran
source .bashrc
from the command line in the home directory to load up the function.
I then executed the function qmserve and noted 5 processes starting.
at q prompt did this:
gw:{h:hopen x;{(neg x)(`userQuery;y);x[]}[h]}[`:localhost:5003]followed by this:
gw(`EQUITY_MARKET_RDB;"select from trade where date=max date")
The result was a hanging cursor.
Looking in the service.q code, what does LB do when it is used in manageConn?
My thoughts for troubleshooting was that I should load up the processes separately on multiple terminals as using ‘&’ suppresses error returns as I’m sure you will know. An alternative view though is that my final process doesn’t have a ‘&’ so should return errors normally.
Keen for any thoughts you might have even if it’s on the next steps for my troubleshooting. I wondered if it was worth loading up the scripts in a q startup process wrapped in my qmserve function but then start up my client q process directly on the command line. I don’t think the function wrapper in the bash script should change things but it never hurts to try.
Simon