In IDM 5.5.0 integrator's guide section 15.18.1, we have the following statement about prefetchlinks:
Cluster nodes that are running a reconciliation sub-job cannot prefetch the global link list. Therefore, you must set prefetchLinks to false for clustered reconciliation mappings.
Checked with Dirk, currently our clustered recon implementation doesn't check this setting and doesn't care about it, we should remove the statement from the guide.
Also it looks better to combine the following two paragraphs together as they talk about the same things:
A complete non-clustered reconciliation run is synchronous with the single reconciliation invocation. This is not the case for clustered reconciliation, where the first execution is synchronous only with the reconciliation of the first page. This job also schedules the subsequent pages of the clustered reconciliation to run on other cluster nodes.
When you schedule a clustered reconciliation or call the operation over REST, do not set waitForCompletion to true. Because clustered reconciliation is not synchronous, you cannot wait for the operation to complete before the next operation starts.