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#1111 AMF: Reject SC swichover (si-swap) when active ccb modifying amf-data exists
duplicate
None
enhancement
amf
d
major
2015-06-24
2014-09-18
No
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.
Check my comment for #1108.
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:nagendra-k@users.sf.net]
Sent: den 18 september 2014 12:59
To: opensaf-tickets@lists.sourceforge.net
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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#1111Tickets: tickets
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.
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] '; opensaf-tickets@lists.sourceforge.net
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:nagendra-k@users.sf.net]
Sent: den 18 september 2014 12:59
To: opensaf-tickets@lists.sourceforge.net
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.
Sent from sourceforge.net because opensaf-tickets@lists.sourceforge.net is subscribed to https://sourceforge.net/p/opensaf/tickets/https://sourceforge.net/p/opensaf/tickets
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#1111Tickets: tickets
Anders Björnerstedt wrote:
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
Related
Tickets:
#1111Tickets: tickets
Will be fixed as part of https://sourceforge.net/p/opensaf/tickets/1105/