Anders Björnerstedt wrote:
> In my last reply below I refer to ticket #1008 but meant ticket #1108.
>
> Ticket #1108: AMF: Implement use of immsv admin-op for aborting non-critical
> CCBs
> Ticket #1111: AMF: Reject SC swichover (si-swap) when active ccb modifying
> amf-data exists
>
> So I meant to say: Ticket #1008 could possibly be closed if a fix for #1111
> prevents all cases of a ccb existing
> during si-swqp that contains ccb-operations on
> AMF objects.
>
Sigh.
I admit, I am a dyslectic.
So I meant to say: Ticket >>>>#1108<<< could possibly be closed if a fix for
#1111 prevents all cases of a ccb existing
during si-swqp that contains ccb-operations on AMF
objects.
/AndersBj
> But on second thought, we also have failover!
>
> This same problem can strike failover.
> In particular, if the active SC goes down and does not come back up, or is
> just to slow in coming back up
> and triggerign a sync.
>
> Then the old-standby-new-active-and-only-remaining SC/AMFD will currently end
> up terminating
> causing a cluster restart.
>
> Thus at both failover and switchover, the AMFD currently depends on imm-sync
> to clear away any open ccb
> that modifies AMF data. This is too vulnreable.
>
> So if we are to skip any of these two tickets it would be #1111 sinc that
> only solves the switchover case.
> I would still recommend doing #1111 since it should be very easy to do and at
> least solves the switchover case.
> Ticket #1111 is not that complex either for the AMFD but it depends on imm
> enhancement #1107 to implemenet
> this admin-op.
>
> I considering if we should make these tickets defects instead of enhancements
> due to thje HA impact it can have.
> But for now lets keep them as enhancements.
>
> /AndersBj
>
> ________________________________
> From: Anders Björnerstedt
> Sent: den 18 september 2014 13:41
> To: '[opensaf:tickets] '; [email protected]
> Subject: RE: [tickets] [opensaf:tickets] #1111 AMF: Reject SC swichover
> (si-swap) when active ccb modifying amf-data exists
>
> Ticket #1008 is an alternative to this ticket.
>
> Ticket #1008 could possibly be closed if a fix of this ticket prevents all
> cases of a ccb existing
> during si-swap that contains ccb-operations on AMF objects.
>
> /AndersBj
>
> ________________________________
> From: Nagendra Kumar [mailto:[email protected]]
> Sent: den 18 september 2014 12:59
> To: [email protected]
> Subject: [tickets] [opensaf:tickets] #1111 AMF: Reject SC swichover (si-swap)
> when active ccb modifying amf-data exists
>
>
> Check my comment for #1108.
>
> ________________________________
>
> [tickets:#1111]<http://sourceforge.net/p/opensaf/tickets/1111> AMF: Reject SC
> swichover (si-swap) when active ccb modifying amf-data exists
>
> Status: unassigned
> Milestone: 4.6.FC
> Created: Thu Sep 18, 2014 08:25 AM UTC by Anders Bjornerstedt
> Last Updated: Thu Sep 18, 2014 08:26 AM UTC
> Owner: nobody
>
> This is related to AMF enhancement #1108
>
> http://sourceforge.net/p/opensaf/tickets/1108/<http://sourceforge.net/p/opensaf/tickets/1108>
>
> That enhancement is about the AMFD clearing the way to re-attach as OI
> by invoking an admin-op on immsv to abort active ccbs operating on AMF data.
>
> But this can be avoided for the si-swap case by the AMFD rejecting the
> si-swap if/when there is any active ccb operating on AMF data.
> This should be trivial for the AMFD to detect since it is the OI for
> all such data.
>
> ________________________________
>
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---
** [tickets:#1111] AMF: Reject SC swichover (si-swap) when active ccb modifying
amf-data exists**
**Status:** unassigned
**Milestone:** 4.6.FC
**Created:** Thu Sep 18, 2014 08:25 AM UTC by Anders Bjornerstedt
**Last Updated:** Thu Sep 18, 2014 10:59 AM UTC
**Owner:** nobody
This is related to AMF enhancement #1108
http://sourceforge.net/p/opensaf/tickets/1108/
That enhancement is about the AMFD clearing the way to re-attach as OI
by invoking an admin-op on immsv to abort active ccbs operating on AMF data.
But this can be avoided for the si-swap case by the AMFD *rejecting* the
si-swap if/when there is any active ccb operating on AMF data.
This should be trivial for the AMFD to detect since it is the OI for
all such data.
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