Parallel Shutdown (was Re: Paralell startup)

[Jeff Pitman]

On Friday 22 October 2004 00:18, Bill Nottingham wrote:
> as opposed
> to something like a database, or some other app that needs to save
> state.

I think we'd surprised about the robustness of SIGINT. 

MySQL:
/bin/kill `cat /var/run/mysqld/mysqld.pid  2> /dev/null ` > /dev/null 
2>&1

PostGRE:
su -l postgres -s /bin/sh -c "/usr/bin/pg_ctl stop -D $PGDATA -s -m 
fast" > /dev/null 2>&1

Probably for transaction rollback and client disconnect, I dunno, I'm 
not a DB yoda.  But, then again you'd hope things have acquiesced on 
the server and you've notified your users such that just nuking it's 
not an issue...

I think most state saving is mainly a distro-centric thing: pid files, 
lock files in /var/run. And little hidden files pooped onto or wiped 
from the filesystem on the way out: /.autofsck, etc.

-- 
-jeff