Appendix C Takeover Postconditions

This appendix provides details about the state of the primary and secondary clusters after a geopg takeover command is executed.

This appendix contains the following topics:

Results of a Takeover When the Partner Cluster Can Be Reached

This section describes the activation state of the primary and secondary clusters before and after a geopg takeover command is executed. The results described in this section assume that the partner cluster can be reached

The following table describes the states when the geopg takeover command is executed on the secondary cluster, cluster-newyork.

Table C–1 Takeover Results When geopg takeover Is Executed on the Secondary Cluster


Cluster Role and State Before Takeover	Cluster Role and State After Takeover
`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, deactivated	`cluster-paris`: secondary, deactivated `cluster-newyork`: primary, deactivated

`cluster-paris`: primary, activated `cluster-newyork`: secondary, deactivated	`cluster-paris`: secondary, deactivated `cluster-newyork`: primary, deactivated
`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, activated	`cluster-paris`: secondary, deactivated `cluster-newyork`: primary, activated, with data replication stopped
`cluster-paris`: primary, activated `cluster-newyork`: secondary, activated	`cluster-paris`: secondary, deactivated `cluster-newyork`: primary, activated, with data replication stopped

The following table describes the states when the geopg takeover command is executed on the primary cluster, cluster-paris.

Table C–2 Takeover Results When geopg takeover Is Executed on the Primary Cluster


Cluster Role and State Before Takeover	Cluster Role and State After Takeover
`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, deactivated	`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, deactivated

`cluster-paris`: primary, activated `cluster-newyork`: secondary, deactivated	`cluster-paris`: primary, activated, with data replication stopped `cluster-newyork`: secondary, deactivated
`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, activated	`cluster-paris`: primary, deactivated `cluster-newyork`: secondary, deactivated
`cluster-paris`: primary, activated `cluster-newyork`: secondary, activated	`cluster-paris`: primary, activated, with data replication stopped `cluster-newyork`: secondary, deactivated

Results of a Takeover When the Partner Cluster Cannot Be Reached

This section describes the activation state of the primary and secondary clusters before and after a geopg takeover command is issued when the partner cluster cannot be reached or when the protection group on the partner cluster is busy.

The following table describes the states when the geopg takeover command is issued on the secondary cluster, cluster-newyork, and the primary cluster cannot be reached or the protection group on the primary cluster is busy.

Note –

The cluster role and state after the takeover, which is given in the table, is only available when the partner cluster can once more be reached.

Table C–3 Takeover Results When geopg takeover Is Executed on the Secondary Cluster and the Primary Cluster Cannot Be Reached


Cluster Role and State Before Takeover	Cluster Role and State After Takeover
`cluster-paris`: primary, deactivated, synchronization status `Unknown` `cluster-newyork`: secondary, deactivated, synchronization status `Unknown`	`cluster-paris`: primary, deactivated, synchronization status `Error` `cluster-newyork`: primary, deactivated, synchronization status `Error`

`cluster-paris`: primary, activated, synchronization status `Unknown` `cluster-newyork`: secondary, deactivated, synchronization status `Unknown`	`cluster-paris`: primary, activated, synchronization status `Error` `cluster-newyork`: primary, deactivated, synchronization status `Error`
`cluster-paris`: primary, deactivated, synchronization status `Unknown` `cluster-newyork`: secondary, activated, synchronization status `Unknown`	`cluster-paris`: primary, deactivated, synchronization status `Error` `cluster-newyork`: primary, activated, with data replication stopped, synchronization status `Error`
`cluster-paris`: primary, activated, synchronization status `Unknown` `cluster-newyork`: secondary, activated, synchronization status `Unknown`	`cluster-paris`: primary, activated, synchronization status `Error` `cluster-newyork`: primary, activated, with data replication stopped, synchronization status `Error`

The following table describes the states when the geopg takeover command is executed on the primary cluster, cluster-paris, and the secondary cluster cannot be reached or the protection group on the secondary cluster is buy.

Table C–4 Takeover Results When geopg takeover Is Executed on the Primary Cluster and the Secondary Cluster Cannot Be Reached


Cluster Role and State Before Takeover	Cluster Role and State After Takeover
`cluster-paris`: primary, deactivated, synchronization status `Unknown` `cluster-newyork`: secondary, deactivated, synchronization status `Unknown`	`cluster-paris`: primary, deactivated, synchronization status `OK`, `Error`, or `Mismatch` `cluster-newyork`: secondary, deactivated, synchronization status `OK`, `Error`, or `Mismatch`

`cluster-paris`: primary, activated, synchronization status `Unknown` `cluster-newyork`: secondary, deactivated, synchronization status `Unknown`	`cluster-paris`: primary, activated, with data replication stopped, synchronization status `OK`, `Error`, or `Mismatch` `cluster-newyork`: secondary, deactivated, synchronization status `OK`, `Error`, or `Mismatch`
`cluster-paris`: primary, deactivated, synchronization status `Unknown` `cluster-newyork`: secondary, activated, synchronization status `Unknown`	`cluster-paris`: primary, deactivated, synchronization status `OK`, `Error`, or `Mismatch` `cluster-newyork`: secondary, activated, synchronization status `OK`, `Error`, or `Mismatch`
`cluster-paris`: primary, activated, synchronization status `Unknown` `cluster-newyork`: secondary, activated, synchronization status `Unknown`	`cluster-paris`: primary, activated, with data replication stopped, synchronization status `OK`, `Error`, or `Mismatch` `cluster-newyork`: secondary, activated, synchronization status `OK`, `Error`, or `Mismatch`

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