SOLR 4.0 - DIH delta-import scheduler

[Jegannathan Mehalingam]

Is the DIH Scheduler available in SOLR 4.1 or in 4.2? I would like to 
know if we can schedule delta-import in SOLR 4.1 or 4.2.

In SOLR 4.1 DIH console, I see a "Refresh Status" button and 
"Auto-Refresh Status" check box. Is this related to the delta-import 
scheduling? I couldn't find any documentation about it. But it seems to 
run something every 2 secs. If someone knows any documentation, can you 
please put the link out.

Thanks,
Jegan