mirror of https://github.com/apache/lucene.git
LUCENE-2257: improve max per-segment term count limit from ~2.1B to ~274B
git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@909352 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless
parent
c0a1615db1
commit
5995714461
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@ -107,6 +107,10 @@ Bug fixes
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* LUCENE-2249: ParallelMultiSearcher should shut down thread pool on
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close. (Martin Traverso via Uwe Schindler)
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* LUCENE-2257: Increase max number of unique terms in one segment to
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termIndexInterval (default 128) * ~2.1 billion = ~274 billion.
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(Tom Burton-West via Mike McCandless)
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New features
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* LUCENE-2128: Parallelized fetching document frequencies during weight
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@ -2548,11 +2548,12 @@ document.write("Last Published: " + document.lastModified);
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<div class="section">
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<p>
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When referring to term numbers, Lucene's current
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implementation uses a Java <span class="codefrag">int</span>, which means
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the maximum number of unique terms in any single index
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segment is 2,147,483,648. This is technically not a
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limitation of the index file format, just of Lucene's
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current implementation.
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implementation uses a Java <span class="codefrag">int</span> to hold the
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term index, which means the maximum number of unique
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terms in any single index segment is ~2.1 billion times
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the term index interval (default 128) = ~274 billion.
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This is technically not a limitation of the index file
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format, just of Lucene's current implementation.
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</p>
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<p>
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Similarly, Lucene uses a Java <span class="codefrag">int</span> to refer
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trailer
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<<
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/Size 153
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/Info 4 0 R
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>>
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startxref
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57078
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57122
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%%EOF
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@ -109,7 +109,7 @@ final class SegmentTermEnum extends TermEnum implements Cloneable {
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return clone;
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}
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final void seek(long pointer, int p, Term t, TermInfo ti)
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final void seek(long pointer, long p, Term t, TermInfo ti)
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throws IOException {
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input.seek(pointer);
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position = p;
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@ -177,7 +177,7 @@ final class TermInfosReader {
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private final void seekEnum(SegmentTermEnum enumerator, int indexOffset) throws IOException {
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enumerator.seek(indexPointers[indexOffset],
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(indexOffset * totalIndexInterval) - 1,
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((long) indexOffset * totalIndexInterval) - 1,
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indexTerms[indexOffset], indexInfos[indexOffset]);
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}
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@ -280,28 +280,6 @@ final class TermInfosReader {
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return true;
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}
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/** Returns the nth term in the set. */
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final Term get(int position) throws IOException {
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if (size == 0) return null;
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SegmentTermEnum enumerator = getThreadResources().termEnum;
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if (enumerator.term() != null &&
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position >= enumerator.position &&
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position < (enumerator.position + totalIndexInterval))
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return scanEnum(enumerator, position); // can avoid seek
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seekEnum(enumerator, position/totalIndexInterval); // must seek
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return scanEnum(enumerator, position);
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}
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private final Term scanEnum(SegmentTermEnum enumerator, int position) throws IOException {
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while(enumerator.position < position)
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if (!enumerator.next())
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return null;
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return enumerator.term();
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}
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private void ensureIndexIsRead() {
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if (indexTerms == null) {
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throw new IllegalStateException("terms index was not loaded when this reader was created");
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@ -1846,11 +1846,12 @@
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<p>
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When referring to term numbers, Lucene's current
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implementation uses a Java <code>int</code>, which means
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the maximum number of unique terms in any single index
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segment is 2,147,483,648. This is technically not a
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limitation of the index file format, just of Lucene's
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current implementation.
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implementation uses a Java <code>int</code> to hold the
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term index, which means the maximum number of unique
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terms in any single index segment is ~2.1 billion times
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the term index interval (default 128) = ~274 billion.
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This is technically not a limitation of the index file
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format, just of Lucene's current implementation.
|
||||
</p>
|
||||
<p>
|
||||
Similarly, Lucene uses a Java <code>int</code> to refer
|
||||
|
|
|
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Reference in New Issue