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

[Kashif Jawed Siddiqui]

Hi,
       Yes it has to be provided in init scripts of corosync or heartbeat. But for corosync 1.4.2 for SLES, it is not provided.

       Can you help me update corosync init script to include to same?

       Sample script will definitly help.

Thanks in advance.


________________________________________
From: Dejan Muhamedagic [dejanmm at fastmail.fm]
Sent: Tuesday, January 31, 2012 4:22 PM
To: The Pacemaker cluster resource manager
Subject: Re: [Pacemaker] How to start resources in a Resource Group     in      parallel

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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> >
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>
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