Naming conflict scenarios - PingDirectory

Naming conflict scenarios - PingDirectory - 9.1

PingDirectory

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pingdirectory-91

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PingDirectory

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PingDirectory 9.1

Processing steps

The Client sends an update (Add, Delete, or Modify DN) request to server A.
The Client sends an update (Add, Delete, or Modify DN) request conflicting with the first request to server A.
Replication propagates the updates.
Conflict resolution takes place.

The following table shows the result of a modification conflict depending on the type of updates that occur. The code does not compare change sequence numbers (CSNs) but applies operations in the order they were received. This might lead to inconsistent replays.

For all of the naming conflict scenarios, assume the following:

Update 1 was applied at Directory Server 1.
Update 2 was applied at Directory Server 2.
Update 1 occurred shortly before Update 2 so that Directory Server 2 received Update 1 after Update 2 was applied.

Naming Conflict Scenarios
Update 1	Update 2	Automatic Resolution?	Result of Conflict Resolution at Directory Server 2 When Update 1 is received
`Modify`	`Delete`	Yes	`Modify` is discarded.
`Modify`	`Modify DN`	Yes	New entry is located based on the entryUUID and `Modify` is applied to the renamed entry.
`Delete`	`Delete`	Yes	`Delete` operation is ignored.
`Delete`	`Modify DN`	Yes	`Delete` operation is applied to the renamed entry.
`Delete` of A	`Add` of B under A	Yes	Entry B is renamed and Entry A is deleted.
`Modify DN`	`Delete` of the same entry targeted by the `Modify DN`	Yes	`Modify DN` operation is ignored.
`Modify DN` with a new parent	`Delete` of parent	No	The entry targeted in the `Modify DN` operation is marked as a conflict entry.
`Modify DN` with a new parent	`Modify DN` of the parent	Yes	The entry is moved under the new DN of the parent.
`Modify DN` of A with new DN B	`Modify DN` of C with new DN B	No	A and B will be conflict entries.
`Add` A	`Modify DN` of the parent of A	Yes	The entry is added under the new DN of the parent.
`Add` A	`Delete` of the parent of A	No	The added entry is marked as a conflict entry.
`Add` A	`Add` A with same set of attributes	Yes	The entryUUID of the incoming Add operation applied to the existing entry.
`Add` A	`Add` A with different set of attributes (or values)	No	The existing entry is marked as a conflicting entry and the incoming `Add` is executed.