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** [tickets:#1305] cpsv: non-collocated ckpts are not receiving  track changes 
if physical replica doesn't exist**

**Status:** review
**Milestone:** 4.6.1
**Created:** Tue Apr 07, 2015 09:03 AM UTC by A V Mahesh (AVM)
**Last Updated:** Tue Sep 15, 2015 09:56 AM UTC
**Owner:** A V Mahesh (AVM)
**Attachments:**

- 
[1305_Writer.c](https://sourceforge.net/p/opensaf/tickets/1305/attachment/1305_Writer.c)
 (13.1 kB; application/octet-stream)


The track changes through a callback are not being received for non-collocated 
Checkpoints,
if physical replica doesn't exist on that particular controller/payload blade.


For the non-collocated Checkpoints, OpenSAF Checkpoint Service will specify
the location of the checkpoint replicas as per the following policy:

    If a non-collocated checkpoint is opened for the first time by an 
application residing
    on a payload blade, the replicas will be created on the local payload blade 
and both the system controller nodes.
    In this case, the replica residing on the payload blade is designated as 
active replica.

    If a non-collocated checkpoint is opened for the first time by an 
application residing
    on the system controller nodes, the replica will be created only on the 
system controller
    blade. In this case, this replica on a system controller node will act as 
the active replica.

    If another application opens the same checkpoint from a payload node, the 
checkpoint service
    will not create the replica on that node.




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