Originally posted by: SystemAdmin

Is it possible to bypass the file /tmp/utmp file each time a user login with telnet session.
I'm currently running test with 10 telnet session per second and the bottleneck is the /etc/utmp file
Does anyone know how to ?

thanks

Originally posted by: SystemAdmin

Why would you want to do this? Put another way what is it you're trying to test exactly? Updating /etc/utmp is a normal part of the way AIX operates. It is the running record of who's logged on to the system and serves as input to commands like finger and who. It also provides input to process accounting if and when you need that. If you're doing performance testing it sounds to me as if you've just found the performance problem you were looking for.

And another thing, what kind of workload are you modeling here? If you really expect to have 10 logins/second I would suggest you have worse problems than you realize.

Regards,
Jim Lane

Originally posted by: SystemAdmin

Thanks for your answer
But the main problem is how to bypass this file !

Originally posted by: SystemAdmin

The point of my answer was that I don't believe there is a way to bypass /etc/utmp nor should there be. It's supposed to hurt when you do something unreasonable.

That being said what kind of performance numbers are you seeing that constitute a bottleneck on this file? I assume it's on the boot device. What kind of numbers do you get from iostat? It's often the case that the boot device is slower than other disks. Have you done any tuning to alleviate this?

HTH

Jim Lane