What's the point of the DirectUpdateHandler? Why would I ever pick it
when I could have the "High performance" DUH2? More pointedly, if I
am adding a feature (SOLR-603) that touches DUH2, and DUH also could
implement the feature, do I need to add it to DUH as well?
The naming of the DUH2 class really leaves a lot to be desired.
This is the only reference that I can see on it: http://lucene.markmail.org/message/mc7mutf43ma7vfse?q=DirectUpdateHandler2
and it pretty much makes it seem like DUH is, well, pointless,
except maybe for back compatibility. Should it be deprecated?
-Grant
