On 20-Feb-14 1:57 AM, Tony Hart wrote:
> Hi Praveen,
>
> Thanks for the explanation. Maybe I can re-phrase the question in terms of
> processes rather than SAF entities. I want to have processes A,B and E run
> on card1 and C,D on card2 with the same failover/revert behavior I described
> below. How might I sent up the mapping of processes (each process performs a
> distinct function) to SG’s, SU’s etc to achieve that?
With current OpenSAF implementation, one can solution can be imagined.
1)All processes will be modeled as a separate 2N application.
2)saAmfSURank can be configured to set initial distribution of
assignments amond the SUs in the same application.
3)Component representing the process (sayA) will perform PG tracking
and will be aware of node leaving and joining the cluster.
4) As soon as a active component gets PG tracking callback for other
component got the standby role because of node, hosting that
component(actually SU), reboot.
it will perform si-swap for its SI to swap the role.
5) CLM can be used to monitor node related events.
Thanks
PRaveen
> thanks,
> —
> tony
>
> On Feb 19, 2014, at 1:58 AM, praveen malviya <[email protected]>
> wrote:
>
>> In 2N model only one SU (say SU1) will be active for all SIs and another
>> SU(say SU2) will be standby for all SIs.
>> So even if 5 SUs are present, one SU1 will be active and another SU2
>> will standby on behalf of all the SIs in the system.
>> Other SUs are referred as spare SUs.
>>
>> Let us suppose SU1 hosted on card1 is active for SI1, SI2,SI3 ....
>> and SU2 hosted on card2 is standby for SI1,SI2, SI3....
>> If card1 reboots, then standby SU2 will become active on behalf of all
>> the SI1,SI2,SI3 ....
>> and others pare SU3 will become new standby.
>> Now if card1 again comes up SU1 will not be given any role on behalf of
>> all the SIs because SU2 is active and SU3 is standby for all SI1,Si2,SI3....
>>
>>
>> Thanks
>> Praveen
>> On 18-Feb-14 6:25 PM, Tony Hart wrote:
>>> 2N (saAmfSgtRedundancyModel=1)
>>>
>>> On Feb 18, 2014, at 7:17 AM, praveen malviya <[email protected]>
>>> wrote:
>>>
>>>> On 17-Feb-14 6:27 PM, Tony Hart wrote:
>>>>> Suppose I have two (identical) server cards in a system and I have 5 SUs
>>>>> (A,B,C,D,E) that each have an active and standby instance. By default
>>>>> all the active instances run on card 1 and all standby on card 2.
>>>> Please tell which redundancy model is being used?
>>>>
>>>> Thanks,
>>>> Praveen
>>>>> What if two of these (C and D say) are heavy CPU users when in the active
>>>>> state and I’d like to have their active instances automatically assigned
>>>>> to the other card from A,B and E. So card1 hosts active instances for
>>>>> A,B and E and card2 hosts active instances for C and D (the standby
>>>>> instances are oppositely assigned).
>>>>>
>>>>> Next if card2 is removed I’d like all the active instances to revert to
>>>>> card1 (A,B,C,D,E).
>>>>>
>>>>> Then if card2 is re-inserted I’d like the original assignments to be
>>>>> re-instanted (card1=A,B,E and card2=C,D).
>>>>>
>>>>> Similarly for card1 insert/re-insert.
>>>>>
>>>>> Is this possible with openSAF?
>>>>>
>>>>> thanks
>>>>> —
>>>>> tony
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