[Pacemaker] [Question]The value of the attribute is changed by a timing and is sent.

[renayama19661014 at ybb.ne.jp]

Hi Andrew,

Thank you for comment.

We are not dissatisfied with a function of attrd.
We understand a function of this attrd as specifications.

Best Regards,
Hideo Yamauchi.


--- On Mon, 2011/9/26, Andrew Beekhof <andrew at beekhof.net> wrote:

> On Tue, Aug 23, 2011 at 11:29 AM,  <renayama19661014 at ybb.ne.jp> wrote:
> > Hi All,
> >
> > We confirmed the situation that a value from attrd was sent to by the change of the value just before that.
> >
> > (snip)
> > Aug 14 20:05:33 srv01 attrd: [13880]: info: attrd_trigger_update: Sending flush op to all hosts for: default_ping_set (100)
> > Aug 14 20:05:33 srv01 pingd: [14137]: info: stand_alone_ping: Node 192.168.100.1 is unreachable (read)
> > Aug 14 20:05:33 srv01 attrd: [13880]: info: attrd_ha_callback: flush message from srv01
> > Aug 14 20:05:33 srv01 attrd: [13880]: info: attrd_perform_update: Sent update 121: default_ping_set=0
> > (snip)
> >
> > The movement that we supposed from log is as follows.
> >
> > Step1) The timer of the value of dampen(default=5s) worked.
> >          Attrd transmits flush message to transmit default_ping_set attribute 100.
> > Step2) However, the communication of the network fell just after that.
> >          The default_ping_set level in attrd is changed to 0 by pingd.
> > Step3) Attrd was going to transmit 100 at the point in time when I transmitted flush message(Step1), but attrd in response to flush message transmitted a value of default_ping_set with 0.
> >
> > Is this movement specifications?
> 
> I can see how this might be undesirable, but it is in line with how
> I'd expect attrd to behave.
> 
> > Or is it a bug?
> >
> > If attrd transmits a latest attribute level by all means, I can understand this movement when it is specifications.
> 
> Right. The flush message means "write whatever value you have right now".
> 
> >
> > Best Regards,
> > Hideo Yamauchi.
> >
> >
> >
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> >
>