[Pacemaker] How to start resources in a Resource Group in parallel

[Dejan Muhamedagic]

Hi,

On Tue, Jan 31, 2012 at 10:29:14AM +0000, Kashif Jawed Siddiqui wrote:
> Hi Andrew,
>       
>           It is the LRMD_MAX_CHILDREN limit which by default is 4.
> 
>           I see in forums that this parameter is tunable by adding /etc/sysconfig/pacemaker
> with the following line as content
>    LRMD_MAX_CHILDREN=8
> 
>           But the above works only for Hearbeat. How do we do it for Corosync?
> 
>           can you suggest?

It is not heartbeat or corosync specific, but depends on support
in the init script (/etc/init.d/corosync). The init script should
read the sysconfig file and then invoke lrmadmin to set the max
children parameter.

Thanks,

Dejan

> Regards
> KASHIF
> 
> ________________________________________
> From: Andrew Beekhof [andrew at beekhof.net]
> Sent: Tuesday, January 31, 2012 2:34 PM
> To: The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] How to start resources in a Resource Group in  parallel
> 
> On Tue, Jan 31, 2012 at 6:46 PM,  <manish.gupta at ionidea.com> wrote:
> > Hi All,
> >  I am using pacemaker 1.0.11 + corosync 1.4.2 for a 2 node cluster
> >  I have configured one Group, which is having 12 resources,
> >  Ordered parameter is set to false but all 12 resource are not started
> > parallel.
> >  At a time only four resource started parallel.
> 
> This is probably the lrmd limit.
> 
> >  Resource 1,2,3,4 starts then 5,6,7,8 starts, then 9,10,11,12
> >  If 5 second sleep is their in Resource-Agent's start method.
> >  Then All the resources will start in 15 second.
> >
> >  Please can you suggest how can I solve the same,
> >
> >  It seems, only four thread starts at a time for a group's resource,
> >
> > Regards
> > Manish
> >
> > On Fri, December 2, 2011 4:23 pm, Andreas Kurz wrote:
> >> Hello Kashif,
> >>
> >>
> >> On 12/02/2011 06:04 AM, Kashif Jawed Siddiqui wrote:
> >>
> >>> Hi All,
> >>>
> >>>
> >>>
> >>>
> >>> I am using pacemaker 1.0.11 + corosync 1.4.2 for a 2 node cluster.
> >>>
> >>>
> >>>
> >>>
> >>> The old cib.xml for Heartbeat based cluster had an option
> >>> "ordered=true | false" for "group" tag which supported starting of
> >>> resources in series or parallel.
> >>
> >> this meta attribute is still available ... when in crm shell add:
> >>
> >> meta ordered=false
> >>
> >> to your group resource ... or you could also use a colocation set.
> >>
> >> Regards,
> >> Andreas
> >>
> >>
> >> --
> >> Need help with Pacemaker?
> >> http://www.hastexo.com/now
> >>
> >>
> >>>
> >>>
> >>>
> >>> By default, resources in Resource Group start in serial order for
> >>> Pacemaker based clusters.
> >>>
> >>>
> >>>
> >>>
> >>> Is there a way to start multiple resources in parallel?
> >>>
> >>>
> >>>
> >>>
> >>> Regards
> >>>
> >>>
> >>> KASHIF
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
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> >>>
> >>>
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> >>>
> >>
> >>
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> >>
> >>
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> >>
> >>
> >
> >
> >
> > _______________________________________________
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> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >
> > Project Home: http://www.clusterlabs.org
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> > Bugs: http://bugs.clusterlabs.org
> 
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> 
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> Bugs: http://bugs.clusterlabs.org
> 
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> 
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