Init: dependency based daemon starting?

note: I saw http://bbs.archlinux.org/viewtopic.php?id=69086, but i have no idea how the implementation is done (I don't understand Italian )
the current daemon backgrounding feature in rc.conf is pretty cool to save time, but:
1) you have no feedback if the daemon started successfully or not
2) due to its lack of finegrained-ness, the speed gains are limited.
for example, this is the DAEMONS array of my home server:
DAEMONS=(syslog-ng network @netfs @crond @sshd rpcbind nfs-common nfs-server openntpd @bitlbee @mediatomb @httpd @noip @dnsmasq)
The items at the right (bitlbee, mediatomb, ..) depend on nfs and ntp beind started completely, but ntpd should not have to wait until all the nfs stuff is started.
unfortunately, with the current "linear" syntax there is no way to improve this.
So if there was a way to express "daemon foo can start as soon as daemons (dependencies) bar and baz are started" we can optimize things a bit further.
then we could basically start everything backgrounded as soon as the dependencies are started.
As for problem 1: you could start each initscript in a seprate wrapper function or whatever, which buffers the stdout and stderr. If you start multiple daemons at the same time, scripts could leak output which may look garbled if you see multiple lines of text from different daemons at the same time. Once the script exited, you write the buffered stdout/stderr and put OK/WARNING thing on the right in place. maybe this is overkill though, most of the initscripts i use give no additional output anyway. But with this way, you could start multiple daemons at the same time in background, but still collect their return status and show it to the user.
Initing in this way can probably be done with a relatively small code increase, but would provide a slight performance improvement for some use cases.
Is it worth it? I don't know. Maybe there are even better initsystems which take it a few steps further, but i thought it was a cool idea

Well, you could always create a meta daemon (an init script in /etc/rc.d/ ) which starts a group of daemons.
It's been a while since I used initng as a lancher for archlinux initscript but it is certainly possible. I don't have the modified scripts anymore but it wasn't that hard to modify anyway.
As far as I know the finit-arc is based on fastinit (it doesn't have any dependency tracking):
http://helllabs.org/finit/
Last edited by PJ (2010-04-27 21:10:24)

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thanks in advance

try this...
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2 (select 'week'||(trunc(l/7,0)+1) wk_no,to_char(trunc(sysdate)+l,'dd-Mon-yyyy') dt,to_char(trunc(sysdate)+l,'Day') "Day" from
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4 xx as
5 (select '06/25/2007' vdate, 100 vamount from dual union all
6 select '06/27/2007', 200 from dual union all
7 select '07/04/2007', 400 from dual)
8 select wk_no,sum(vamount) from
9 (select (select wk_no from rt where dt = to_date(vdate,'MM/DD/YYYY')) wk_no,vamount from xx)
10 group by wk_no;
WK_NO                                        SUM(VAMOUNT)
week1                                                 300
week2                                                 400
SQL>
SQL> select 'week'||(trunc(l/7,0)+1) wk_no,to_char(trunc(sysdate)+l,'dd-Mon-yyyy') dt,to_char(trunc(sysdate)+l,'Day') "Day" from
2 (select level-1 l from dual connect by level <= 367) where trunc(sysdate) between trunc(sysdate) and add_months(trunc(sysdate),12);
WK_NO                                        DT          Day
week1                                        25-Jun-2007 Monday
week1                                        26-Jun-2007 Tuesday
week1                                        27-Jun-2007 Wednesday
week1                                        28-Jun-2007 Thursday
week1                                        29-Jun-2007 Friday
week1                                        30-Jun-2007 Saturday
week1                                        01-Jul-2007 Sunday
week2                                        02-Jul-2007 Monday
week2                                        03-Jul-2007 Tuesday
week2                                        04-Jul-2007 Wednesday
week2                                        05-Jul-2007 Thursday
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But I saw the problem could to be simple avoided using the options
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documentation at
http://www.oracle.com/technology/software/products/database/xe/files/install.102/b25144/toc.htm#BABCEAHD
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Hyperion Planning dynamic forms based on start and end date across years

Hi All,
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Last edited by Bennythen00b (2010-12-18 23:30:04)

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thanks and regards,
Janus
[email protected]

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Last edited by 10098 (2010-05-16 12:35:54)

Maybe try Backgrounding it by adding a @ in front of it within /etc/rc.conf.
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Init: dependency based daemon starting?

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