[Pacemaker] Speeding up startup after migration

[Vladislav Bogdanov]

01.04.2013 17:28, David Vossel пишет:
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> 
> ----- Original Message -----
>> From: "Vladislav Bogdanov" <bubble at hoster-ok.com>
>> To: pacemaker at oss.clusterlabs.org
>> Sent: Friday, March 29, 2013 2:03:27 AM
>> Subject: Re: [Pacemaker] Speeding up startup after migration
>>
>> 29.03.2013 03:31, Andrew Beekhof wrote:
>>> On Fri, Mar 29, 2013 at 4:12 AM, Benjamin Kiessling
>>> <mittagessen at l.unchti.me> wrote:
>>>> Hi,
>>>>
>>>> we've got a small pacemaker cluster running which controls an
>>>> active/passive router. On this cluster we've got a semi-large (~30)
>>>> number of primitives which are grouped together. On migration it takes
>>>> quite a long time until each resource is brought up again because they
>>>> are started sequentially. Is there a way to speed up the process,
>>>> ideally to execute these resource agents in parallel? They are fully
>>>> independent so the order in which they finish is of no concern.
>>>
>>> I'm guessing you have them in a group?  "Don't do that" and they will
>>> fail over in parallel.
>>
>> Does current lrmd implementation have batch-limit like cluster-glue's
>> one had? Can't find where is it.
> 
> The batch-limit option is still around, but has nothing to do with
> the lrmd. It does limit how many resources can execute in parallel, but at
> the transition engine level rather than the lrmd.

Yep, I know that option, it was there for a very long time.

So, if I understand correctly, new lrmd runs as many simultaneous jobs
as possible. Unfortunately, in some circumstances this would result in
the high node load and timeouts. Is there a way to some-how limit that load?

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> http://clusterlabs.org/doc/en-US/Pacemaker/1.1-pcs/html-single/Pacemaker_Explained/index.html#_available_cluster_options
> 
> -- Vossel
> 
>>
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