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From Erick Erickson <>
Subject Re: is this the right way to go?
Date Sat, 12 Jun 2010 00:50:33 GMT
Of course you can specify which is first. You can construct a Sort
object with an arbitrary number of fields and the ordering is respected.
That is, you create a Sort object with field1, field2, field3, then field2
is used if and only if the document order isn't determined by field1.
Field3 is used to break ties for documents whose field1 and field2
are equal...


On Wed, Jun 9, 2010 at 10:03 PM, fujian <> wrote:

> Thanks Eric and Ian!
> Yes, time stamp is one of our sort fields. By splitting it into
> year/month/day/... it'll reduce the memory usage dramatically. But I don't
> know if we can specify the significance of the sort fields, like year
> first,
> followed by month, day ... etc.
> Another thing is about unique. I thought it was unique "field value". If it
> means unique term, for English even loading all around 300,000 terms it
> won't take much memory, right? (Suppose the average length of term is 10,
> the total memory usage is 10*300,000=3MB)
> Thanks again, this helps a lot!
> -Fujian
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