Re: Kannel HTTP MO delivery failing under load

Hillel wrote:
> Hi,
> 
> Are you using as a OpenSMPP SMSC simulator the http://opensmpp.logica.com/
> or as another version?
> 
> Please email back the version you are using, so others can confirm your
> results.
> 
> Rgds

Sorry, it turns out the version of OpenSMPP we're using has been heavily 
modified from the original - however, I have been able to reproduce the 
problem using the latest version of SMPPSim, with the following 
configuration options (modified only slightly from the stock configuration):

SMPP_PORT=7011
SMPP_CONNECTION_HANDLERS=2

CONNECTION_HANDLER_CLASS=com.seleniumsoftware.SMPPSim.StandardConnectionHandler
PROTOCOL_HANDLER_CLASS=com.seleniumsoftware.SMPPSim.StandardProtocolHandler

LIFE_CYCLE_MANAGER=com.seleniumsoftware.SMPPSim.LifeCycleManager

MESSAGE_STATE_CHECK_FREQUENCY=5000

MAX_TIME_ENROUTE=10000

PERCENTAGE_THAT_TRANSITION=75

PERCENTAGE_DELIVERED=100
PERCENTAGE_UNDELIVERABLE=0
PERCENTAGE_ACCEPTED=0
PERCENTAGE_REJECTED=0

DISCARD_FROM_QUEUE_AFTER=60000

HTTP_PORT=8081
HTTP_THREADS=1
DOCROOT=www
AUTHORISED_FILES=/css/style.css,/index.htm,/inject_mo.htm,/favicon.ico,/images/logo.gif,/images/dots.gif,/user-guide.htm,/images/homepage.gif,/images/inject_mo.gif
INJECT_MO_PAGE=/inject_mo.htm

SYSTEM_ID=test
PASSWORD=test

DELIVERY_MESSAGES_PER_MINUTE=12000
DELIVER_MESSAGES_FILE=deliver_messages.csv

LOOPBACK=FALSE

OUTBOUND_QUEUE_MAX_SIZE=500000
INBOUND_QUEUE_MAX_SIZE=500000

DECODE_PDUS_IN_LOG=false

CAPTURE_SME_BINARY=false
CAPTURE_SME_BINARY_TO_FILE=sme_binary.capture
CAPTURE_SMPPSIM_BINARY=false
CAPTURE_SMPPSIM_BINARY_TO_FILE=smppsim_binary.capture
CAPTURE_SME_DECODED=false
CAPTURE_SME_DECODED_TO_FILE=sme_decoded.capture
CAPTURE_SMPPSIM_DECODED=false
CAPTURE_SMPPSIM_DECODED_TO_FILE=smppsim_decoded.capture

CALLBACK=false
CALLBACK_ID=SIM1
CALLBACK_TARGET_HOST=localhost
CALLBACK_PORT=3333

SMSCID=SMPPSim


However, SMPPSim isn't as fast as OpenSMPP, so I had to run 4 instances 
on separate servers (with additional SMSC configurations in Kannel 
accordingly) to reach an MO injection rate of ~600 MOs/sec (no MTs), in 
order to trigger the problem.

At rates of ~450 MOs/sec, with no MTs, or ~350 MOs/sec + ~320 MTs/sec, 
the problem did not surface.

Regardless of the SMSC simulator being used, MO injection rates of 
around 600 MOs/sec (on the hardware I described before) triggers the 
problem. Has anyone been able to reproduce this yet, or does anyone have 
an idea why this might happen?

Cheers,

-- 
Giulio Harding
Systems Administrator

m.Net Corporation
Level 13, 99 Gawler Place
Adelaide SA 5000, Australia

Tel: +61 8 8210 2041
Fax: +61 8 8211 9620
Mobile: 0432 876 733
MSN: [email protected]

http://www.mnetcorporation.com