how much LU can i define on a ibm P520 p5+ 2cpu 4G

[zhangych]

Now I build a server to change the tcp/ip protocol to sna.Each type of
transaction must use one LU on a PU.can ibm P520 p5+ 2cpu 4G run 40 LU with
40 sessions each?

I write the program with each type use one process with 40 thread to listen
on tcp/ip,convert the GBK(ASCII) to EBCDIC,then using sync APPC API to the
OS/390.

[l***@attglobal.net]

Post by zhangych
Now I build a server to change the tcp/ip protocol to sna.Each type of
transaction must use one LU on a PU.can ibm P520 p5+ 2cpu 4G run 40 LU with
40 sessions each?

Yes, a p520 with 4Gig can handle 1600 concurrent sessions.

You will need to define a LU6.2 MODE ("LOGMODE" in vtam terminology)
that allows 40 max sessions if the AIX LU and the target LU
are the same.

Post by zhangych
I write the program with each type use one process with 40 thread to listen
on tcp/ip,convert the GBK(ASCII) to EBCDIC,then using sync APPC API to the
OS/390.

If you use the syncronous API and attempting to service 40 sessions
you will probably not get acceptable throughput. One slow session
could cause delays for the other 39. That is one of the reasons
why the async API is better when using threads and many sessions.

Paul Landay

[zhangych]

Thanks alot first.
Why i use the sync API to service 40 sessions,one of 40 session slow will
cause the delays for other 39.
Each session do his seperate transaction,each thread wait the host response
back,they will impact each other?

Can the send type with AP_SEND_DATA_P_TO_R_CONFIRM used by APPC can be
seperated with APPC_Async API?
just like:
void * recv(vcb,tp_id,conv_id,corr);
{
wait n seconds;
APPC_Async();//check receive back
...
}

rc = APPC_Async(vcb,recv,corr);

Can give a Async Clinet Samples to me?

Post by l***@attglobal.net

Post by zhangych
Now I build a server to change the tcp/ip protocol to sna.Each type of
transaction must use one LU on a PU.can ibm P520 p5+ 2cpu 4G run 40 LU
with 40 sessions each?

Yes, a p520 with 4Gig can handle 1600 concurrent sessions.
You will need to define a LU6.2 MODE ("LOGMODE" in vtam terminology)
that allows 40 max sessions if the AIX LU and the target LU
are the same.

Post by zhangych
I write the program with each type use one process with 40 thread to
listen on tcp/ip,convert the GBK(ASCII) to EBCDIC,then using sync APPC
API to the OS/390.

If you use the syncronous API and attempting to service 40 sessions
you will probably not get acceptable throughput. One slow session
could cause delays for the other 39. That is one of the reasons
why the async API is better when using threads and many sessions.
Paul Landay