Hi. The DataModel interface in org.apache.mahout.cf.taste.model
specifies in the documentation for the methods getUserIDs & getItemIDs
all {user,item} IDs in the model, in order
My question is: is the "in order" specification a standing requirement?
I've browsed casually through the source and it seems there is no need
for the iterator to return IDs in order (the uses I saw just iterate
through the values apparently with no requirement for them to be
inorder). But the code base is big, so I may have missed places where it
is actually needed.
The reason I ask is that I'm implementing a custom DataModel for our
purposes, which can be updated on the fly without rebuilding, and the
need to return the IDs in order is somehow inconvenient, since it
affects efficiency. If I could get away without ordering, it would be
much better.
Thanks
Paulo
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