If this happens as soon as you start STAF up, I would suspect network
issues and/or name server (DNS) issues. STAF attempts to resolve the host
names using standard socket APIs.
STAF does not do anything to restrict the response time. You should look
into your network settings. Also, see the suggestions in the STAF forum
thread links that Dave provided in his note.
In our environment with static IP addresses, I can do STAF pings very
quickly from one Windows or Linux machine to another in our lab. For
example, using the STAFLoop executable we provide, I can execute 10 STAF
pings to another machine with each ping taking any average time of 0.145
seconds.
C:\>STAFLoop 10 client1.ibm.com PING PING
Total loops: 10
Total time : 1.453
Avg. time : 0.145
Loops/sec : 6.88231
You can also verify STAF's performance using the local IPC interface
(instead of a network interface) by specifying "local://local" (or
"local") for the endpoint. For example, using the STAFLoop executable, I
can execute 10 STAF pings to the local machine (using the local IPC
interface) with each ping taking an average time of 0.002 seconds.
C:\>STAFLoop 10 local PING PING
Total loops: 10
Total time : 0.020
Avg. time : 0.002
Loops/sec : 500
In the default STAF.cfg file, STAF configures two network interfaces (ssl
and tcp). Are you using the STAF ssl interface (secure TCP/IP) or the
STAF tcp interface (non-secure TCP/IP)? If you're using the ssl interface
(the default if your using the default STAF.cfg file), then you could try
using the tcp interface instead to see if it is any faster (e.g. STAF
tcp://hostname PING PING). Note that if you don't specify which interface
to use in your endpoint, STAF will first try to communicate to a remote
machine with the default interface (the first interface specified if the
DEFAULTINTERFACE setting is not set in the STAF.cfg file). If that fails
twice (as the default CONNECTATTEMPTS is 2, but is configurable), then
STAF will attempt to connect using the second interface (if one is
configured), and cache whichever one was used so that it knows which one
to use in the future.
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com
(512) 286-7313 or Tieline 363-7313
Rajiv Telang <rajiv_tel...@yahoo.com>
11/03/2009 03:36 AM
To
staf-users@lists.sourceforge.net
cc
Subject
[staf-users] STAF takes a long time to respond (windows and linux)
Hi,
I am trying the STAF over a dedicated network with static IP addresses for
all the machine over network. I am seeing a very slow response time from
STAF. A simple staf ping command takes 4-5 seconds to respond back with a
pong. A simple windows/linux ping operation takes less than a second. This
slow response time from STAF hinders the performance. I have installed
full STAF package from the installer available.
I have seen similar behavior with DHCP IP addresses. And this is true for
both windows and linux versions of STAF.
Is there a setting in STAF that restricts the response time? Can I do some
changes in any of the configuration files to improve the time?
I would appreciate a solution on this problem. Thanks in advance.
- Rajiv
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