HCP System Management Help


Primary system failure workflow

The table below outlines what happens when the primary system for an active/passive link fails.

Step What you do What happens
Primary system fails
1

On the replica, fail over the link

Applicable tenants and directories on the replica become read-write; applicable tenants and directories on the primary system either remain read-write or become read-only depending on whether the two systems can communicate with each other; if DNS failover is enabled, the replica broadcasts new DNS configuration

2

If DNS failover is disabled, direct clients to write only to the replica

 

Primary system comes back online

3

If the primary system has been rebuilt:

On the primary system, upload the replication SSL server certificate from the replica

On the replica, upload the replication SSL server certificate from the primary system

 
4

On the replica, update the link configuration as needed

 
5

If the link is broken, on the replica, send a request to restore the link

For a cross-release link, pending link request appears on the primary system

Otherwise, replication link is recreated

6

For a cross-release link, on the primary system, accept the restored link

For a cross-release link, replication link is recreated

7

On the replica, begin data recovery

Applicable tenants and directories on the replica remain read-write; applicable tenants and directories on the primary system remain or become read-only; data recovery from the replica to the primary system begins

8

Wait for data recovery to come close to being up to date

 
9

On the replica, complete data recovery

Applicable tenants and directories on the replica become read-only; applicable tenants and directories on the primary system remain read-only; data recovery from the replica to the primary system continues to completion

Data recovery finishes
10 Nothing

Applicable tenants and directories on the replica remain read-only; applicable tenants and directories on the primary system become read-write; the primary system and the replica broadcast original DNS configurations; replication from the primary system to the replica restarts

11

If DNS failover is disabled, after you see this message in the system log, direct clients to write only to the primary system: Replication data recovery completed

 

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