Hi all.
This may seem a longish and informal mail, but do correct me if my
assumptions are wrong anywhere, otherwise my actual doubt will make no
sense.
Say I opened an IndexWriter on an initially empty directory, using
autocommit = true. Now, what I do is add and delete documents randomly. I
set "x" as maxBufferedDocs and "y" as maxBufferedDeleteTerms (x < y).
IndexWritrer starts its work. Now, I perfom the following sequences :
STAGE 1 :
Add "x-2" documents one after the another. Total docs in
memory = x-2 (1)
Delete 3 docs from memory Total docs
in memory = x-5 (2)
Add 5 docs one after another Total docs
in memory = x (3)
STAGE 2 :
A flush happens, sice maxBufferedDocs reached. Total docs in
memory = 0 (4)
Thus, it is also a commit.
STAGE 3 :
Add x-10 docs one after other Total docs
in memory = x-10 (5)
NOW ... I call deleteDocuments(Term term), which has potential matches at
two places :
a) x-15 (out of x-10) documents currently residing in memory.
b) x-20 (out of x) documents currently in the index directory.
(6)
IndexWriter.close() is called
(7)
Now, my question is, will the index contain
(i) a total of (x) + (x-10) - (x-15) documents
(ii) a total of (x) + (x-10) - (x-20) documents
(iii) a total of (x) + (x-10) - (x-15) - (x-20) documents
Secondly, will the answer change had I opened the IndexWriter in autocommit
= false mode?
Several other permutations of (autocommit mode), (points of flush call),
(points of close call) exist, but I guess I will be fine if I get the answer
to the first question itself. A little explanation will be highly obliged.
Looking forward to responses.
Ajay Garg
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