Shutdown for rasqlinsert

[Carter Bullard]

Hey Dave,
Always good questions.  Well, rasqlinsert() schedules writes to the database,
for flows that it is tracking, and it can queue up a lot of operations,
depending on the load.  So when you stop rasqlinsert(), it will have to
commit the database inserts and updates that are in its scheduled queue, and
then it will have to flush any dirty flow caches that have not been scheduled.
Depending on what its doing, it could be 100's, 1,000's, 10,000's of database
operations that have to be done.

Assuming that its doing the right thing, it could take a while for rasqlinsert()
to flush all its operations.  A -9 will just stop it in its tracks, so your
tables are going to be incomplete.  But, if your rasqlinsert() doesn't finish,
I should look into termination, to make sure its not blocking on a semaphore,
or one of the worker threads isn't exiting early...… can you describe the load
and I can try to replicate, if you think there is a problem ?

Carter


On Jun 11, 2013, at 12:36 AM, "David Edelman" <dedelman at iname.com> wrote:

> Carter,
>  
> Is it just me or does shutting down rasqlinsert always need a bit of cyber violence. I can’t seem to get kill(1) to stop the process even if I wait patiently. The usual suspects like HUP bounce off harmlessly but -9 seems to do the trick. Is there something that I am not understanding (other than the full suite of things that I normally don’t understand.) I’ve looked at the signal handler and it seems to be doing quite a bit of work, how long should I expect to wait for a clean –HUP ?
>  
>  
>  
> --Dave
>  
>  
> From: Carter Bullard [mailto:carter at qosient.com] 
> Sent: Monday, June 10, 2013 10:05 PM
> To: David Edelman
> Cc: 'Matt Brown'; argus-info at lists.andrew.cmu.edu
> Subject: Re: [ARGUS] Rewrite of rastream
>  
> Hey Dave,
> Ooooops, ...., lets try this version of rastream.c.

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