Our company is “migrating” approx. 300 users from a series of private
WAN connections to Internet connections. With the private WAN
connections, we were supporting 70-80 users per QNX application server
[actually, as they are not precisely distributed, we have had 96
users on a single box].
I have successfully migrated 35-40 users to a telnets solution [yes,
that’s telnet"S", as in SSL-telnet, TCP port 992], using Kermit on the
client side, and a Linux box running stunnel sitting between the
Internet
router and the QNX app server.
However, due to two limitations, I will be unable to go beyond 60-61
users:
-
Dev allows me only 128 devices. I had read somewhere in the past
that
a new Dev [I believe I have 4.24G], will allow me to go to > 128.
Can anyone verify this and point me toward it ???
-
Dev.pty, according to usage, is limited to 4 prefixes [p,q,r,s], and
16 device-pairs each, for a total of 64 [which is obviously not even
possible with Dev max = 128].
I have already established through experimentation that Dev.pty WILL
create devices with prefixes other than p-s …
Dev -n128 &
Dev.pty -l p -n 1 &
Dev.pty -l q -n 1 &
Dev.pty -l r -n 1 &
Dev.pty -l s -n 1 &
Dev.pty -l t -n 1 &
/dev DOES contain a ttyt0 and ptyt0.
However, the version of telnetd which I have will not use any of
these devices …
telnet localhost : uses /dev/ptyp0
telnet localhost : uses /dev/ptyq0
telnet localhost : uses /dev/ptyr0
telnet localhost : uses /dev/ptys0
telnet localhost : Error: all network devices in use
Does anyone know where I might find a telnetd which supports Dev.pty
prefixes > “s” ???
Or, does anyone have any alternative solutions [other than dropping
another 2 app server boxes on the network] ??
In article <3BD4C306.F6D432A8@one.net>, saschaef@one.net says…
Our company is “migrating” approx. 300 users from a series of private
WAN connections to Internet connections. With the private WAN
connections, we were supporting 70-80 users per QNX application server
[actually, as they are not precisely distributed, we have had 96
users on a single box].
I have successfully migrated 35-40 users to a telnets solution [yes,
that’s telnet"S", as in SSL-telnet, TCP port 992], using Kermit on the
client side, and a Linux box running stunnel sitting between the
Internet
router and the QNX app server.
However, due to two limitations, I will be unable to go beyond 60-61
users:
- Dev allows me only 128 devices. I had read somewhere in the past
that
a new Dev [I believe I have 4.24G], will allow me to go to > 128.
Can anyone verify this and point me toward it ???
I don’t have all of your answers - somebody else will have to fill those
in. But, you can start more than one Dev. It will simply have to take
over a different prefix - like maybe /dv2 (or whatever you choose). Of
course all of the software that wants these devices must be able to be
pointed to this additional prefix.
- Dev.pty, according to usage, is limited to 4 prefixes [p,q,r,s], and
16 device-pairs each, for a total of 64 [which is obviously not even
possible with Dev max = 128].
I have already established through experimentation that Dev.pty WILL
create devices with prefixes other than p-s …
Yes, it will take just about any letter you give it. However, the
problem is the using programs looking for those other letters. Programs
like telnetd. As you have noticed…
Dev -n128 &
Dev.pty -l p -n 1 &
Dev.pty -l q -n 1 &
Dev.pty -l r -n 1 &
Dev.pty -l s -n 1 &
Dev.pty -l t -n 1 &
/dev DOES contain a ttyt0 and ptyt0.
However, the version of telnetd which I have will not use any of
these devices …
telnet localhost : uses /dev/ptyp0
telnet localhost : uses /dev/ptyq0
telnet localhost : uses /dev/ptyr0
telnet localhost : uses /dev/ptys0
telnet localhost : Error: all network devices in use
Does anyone know where I might find a telnetd which supports Dev.pty
prefixes > “s” ???
Or, does anyone have any alternative solutions [other than dropping
another 2 app server boxes on the network] ??
–
Stephen Munnings
Software Developer
Corman Technologies Inc.
Scott Schaefer <saschaef@one.net> wrote:
Take a look at the docs to Dev.pty – it tells the search order that
telnetd, etc use to search for available pseudo-tty devices. And it
also gives examples of running an additional Dev to handle new
directories.
The architecture should handle more than you could ever want.
-David
QNX Training Services
I do not answer technical questions by email.
David Gibbs wrote:
Scott Schaefer <> saschaef@one.net> > wrote:
Take a look at the docs to Dev.pty – it tells the search order that
telnetd, etc use to search for available pseudo-tty devices. And it
also gives examples of running an additional Dev to handle new
directories.
Ouch !! RTFM – I feel “r-e-a-l-l-y s-m-a-l-l” …
I HAD checked the (old) printed manuals. I haven’t had a reason to
seek technical help for almost 4 years, and had forgotten that the
newer manuals were distibuted as html [blame that on the fact that
those darn QNX boxes just sit and run, and run, and … – we reached
14 months on one last week].
The architecture should handle more than you could ever want.
256,064 should be enough 
-David
QNX Training Services
I do not answer technical questions by email.