Michael Dodd wrote:
> Dejan Muhamedagic wrote:
>> On Tue, Mar 27, 2007 at 04:08:27PM +0200, Max Hofer wrote:
>>
>>> On Tuesday 27 March 2007 13:11, Dejan Muhamedagic wrote:
>>>
>>>> On Tue, Mar 27, 2007 at 10:17:22AM +0200, Andrew Beekhof wrote:
>>>>
>>>>> On Mar 27, 2007, at 1:19 AM, Michael Dodd wrote:
>>>>>
>>>>>
>>>>>> Alan Robertson wrote:
>>>>>>
>>>>>>> That would probably be because you've created a split-brain
>>>>>>> situation,
>>>>>>> and heartbeat is recovering from it by restarting the services
>>>>>>> on both
>>>>>>> machines.
>>>>>>>
>>>>>>> http://linux-ha.org/SplitBrain
>>>>>>>
>>>>>>> Generally, you want to avoid a split-brain condition. If you have
>>>>>>> shared storage you REALLY want to avoid it - since it will trash
>>>>>>> your
>>>>>>> data. http://linux-ha.org/BadThingsWillHappen
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> Thanks-I wondered if that's what was happening.
>>>>>>
>>>>>> Am I going to need to get STONITH configured for this? We're not
>>>>>> doing any kind of resource sharing on realservers, so I'd like to
>>>>>> avoid the complexity there. We're looking for something similar
>>>>>> to what Daniel Bray has mentioned in his recent mail to the list,
>>>>>> but ideally I'd like to avoid the added complexity of having to
>>>>>> maintain cib.xml.
>>>>>>
>>>>> maintain?
>>>>> sure its a bit more complex to set up but what do you mean by
>>>>> maintain?
>>>>>
>>>> as a matter of fact, you'll be so much better off with the crm
>>>> based cluster (v2) when it comes to maintenance. v1 is definitely
>>>> easier to start with, but once you get the v2 going you'll find it
>>>> more enjoyable for administration.
>>>>
>>> I agree with you from the point of view of a cluster system
>>> designer/tester but I disagree from the point of view of a customer
>>> (the person who bought the cluster).
>>>
>>
>> hmm. does the customer have skilled personel? after all, whoever's
>> going to manage a cluster (any kind of cluster) has to have
>> certain admin skills. it's definitely not like getting a household
>> appliance.
>>
>>
>>> Lets see what operations a normal sysadmin had to do with heartbeat v1
>>> and compare it to v2:
>>>
>>> heartbeat v1:
>>> * start/stop heartbeat
>>> * make a node standby --> forced switchover to the other node
>>>
>>
>> yes, and that's more or less _all_ it can do.
>>
> In our example, this is really all we're looking for. Are there things
> we'll get from v2 that would make the additional learning curve
> worthwhile?
The ability to monitor resources. The ability to have clusters with
more than 2 nodes.
--
Alan Robertson <[EMAIL PROTECTED]>
"Openness is the foundation and preservative of friendship... Let me
claim from you at all times your undisguised opinions." - William
Wilberforce
_______________________________________________
Linux-HA mailing list
[email protected]
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
