[Info-vax] Integrity iLO Configuration?

[Arne Vajhøj]

On 6/25/2021 3:15 PM, Dave Froble wrote:
> On 6/25/2021 8:52 AM, Arne Vajhøj wrote:
>> On 6/24/2021 6:38 PM, Dave Froble wrote:
>>> I need to develop a better method of handling lots of socket connect
>>> requests.  I also need to see if my ideas will work Ok.
>>>
>>> Current thoughts are a single listener that validates requests,
>>> accepts the connection, and passes it off to a worker process, then
>>> drops it's own connection to the socket.  Involves some inter-process
>>> communications.  Listener might get rather busy, but will spend little
>>> time on each request.
>>
>> If you write the listener in a language that supports threading, then
>> it could be done relative simple.
>>
>> client---(TCP)---multi threaded listener---(IPC)---N worker processes
>>
>> The multi threaded listner has:
>> - 1 thread that accepts connections and put them in queue
>> - N handler threads that in a loop take connection from queue
>>   and does passthrough between client and worker process until
>>   client is done
>>
>> Optionally you could add another tread monitoring queue length
>> and handler thread activity.
> 
> If I understand correctly what you suggest, it does not fit what I want.
> 
> Now, it doesn't happen, and I'm not sure why it ever would, but the 
> listener might have to go down for some reason.  This would kill all 
> threaded processing, sub-processes, and such.  My desire is to spawn the 
> worker processes, and they would then be independent of the listener. 
> While most jobs run very quickly, what about a request for a report that 
> takes 3 hours to run and then return the result(s)?

So the passthrough threads are not good.

Could you modify the protocol to work like:

* client connect to port N (listener)
* listener validates request, determine a free worker process, tell
   worker to get ready and tell client to connect to port M
* client connect to port M (worker)

?

> I learned long ago that when someone tells me "that never happens", it 
> will be one of the first things to bite me on the ass, and therefore I 
> plan for it happening.

Murphy's law.

Arne