jpountz commented on a change in pull request #1234: Add compression for Binary
doc value fields
URL: https://github.com/apache/lucene-solr/pull/1234#discussion_r379295432
##########
File path:
lucene/core/src/java/org/apache/lucene/codecs/lucene80/Lucene80DocValuesConsumer.java
##########
@@ -353,67 +360,193 @@ private void writeBlock(long[] values, int length, long
gcd, ByteBuffersDataOutp
}
}
- @Override
- public void addBinaryField(FieldInfo field, DocValuesProducer
valuesProducer) throws IOException {
- meta.writeInt(field.number);
- meta.writeByte(Lucene80DocValuesFormat.BINARY);
-
- BinaryDocValues values = valuesProducer.getBinary(field);
- long start = data.getFilePointer();
- meta.writeLong(start); // dataOffset
- int numDocsWithField = 0;
- int minLength = Integer.MAX_VALUE;
- int maxLength = 0;
- for (int doc = values.nextDoc(); doc != DocIdSetIterator.NO_MORE_DOCS; doc
= values.nextDoc()) {
- numDocsWithField++;
- BytesRef v = values.binaryValue();
- int length = v.length;
- data.writeBytes(v.bytes, v.offset, v.length);
- minLength = Math.min(length, minLength);
- maxLength = Math.max(length, maxLength);
+ class CompressedBinaryBlockWriter implements Closeable {
+ FastCompressionHashTable ht = new LZ4.FastCompressionHashTable();
+ int uncompressedBlockLength = 0;
+ int maxUncompressedBlockLength = 0;
+ int numDocsInCurrentBlock = 0;
+ int[] docLengths = new
int[Lucene80DocValuesFormat.BINARY_DOCS_PER_COMPRESSED_BLOCK];
+ byte[] block = new byte [1024 * 16];
Review comment:
Depending on the data that will be indexed it's very hard to know what is
the right initial size here. Maybe start with an empty array? This will also
give increase confidence that the resizing logic works.
```suggestion
byte[] block = BytesRef.EMPTY_BYTES;
```
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
