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Adding range based pruning to bloom index

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- keys compared lexicographically using String::compareTo
 - Range metadata additionally written into parquet file footers
 - Trim fat & few optimizations to speed up indexing
 - Add param to control whether input shall be cached, to speed up lookup
 - Add param to turn on/off range pruning
 - Auto compute of parallelism now simply factors in amount of comparisons done
 - More accurate parallelism computation when range pruning is on
 - tests added & hardened, docs updated
This commit is contained in:
Vinoth Chandar
2017-07-14 09:29:16 -07:00
committed by prazanna
parent 0b26b60a5c
commit 86209640f7
25 changed files with 784 additions and 473 deletions
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25
hoodie-common/src/main/java/com/uber/hoodie/avro/HoodieAvroWriteSupport.java
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@@ -30,24 +30,47 @@ import java.util.HashMap;
*/
public class HoodieAvroWriteSupport extends AvroWriteSupport {
private BloomFilter bloomFilter;
private String minRecordKey;
private String maxRecordKey;
public final static String HOODIE_AVRO_BLOOM_FILTER_METADATA_KEY =
"com.uber.hoodie.bloomfilter";
public final static String HOODIE_MIN_RECORD_KEY_FOOTER = "hoodie_min_record_key";
public final static String HOODIE_MAX_RECORD_KEY_FOOTER = "hoodie_max_record_key";
public HoodieAvroWriteSupport(MessageType schema, Schema avroSchema, BloomFilter bloomFilter) {
super(schema, avroSchema);
this.bloomFilter = bloomFilter;
}
@Override public WriteSupport.FinalizedWriteContext finalizeWrite() {
@Override
public WriteSupport.FinalizedWriteContext finalizeWrite() {
HashMap<String, String> extraMetaData = new HashMap<>();
if (bloomFilter != null) {
extraMetaData
.put(HOODIE_AVRO_BLOOM_FILTER_METADATA_KEY, bloomFilter.serializeToString());
if (minRecordKey != null && maxRecordKey != null) {
extraMetaData.put(HOODIE_MIN_RECORD_KEY_FOOTER, minRecordKey);
extraMetaData.put(HOODIE_MAX_RECORD_KEY_FOOTER, maxRecordKey);
}
}
return new WriteSupport.FinalizedWriteContext(extraMetaData);
}
public void add(String recordKey) {
this.bloomFilter.add(recordKey);
if (minRecordKey != null) {
minRecordKey = minRecordKey.compareTo(recordKey) <= 0 ? minRecordKey : recordKey;
} else {
minRecordKey = recordKey;
}
if (maxRecordKey != null) {
maxRecordKey = maxRecordKey.compareTo(recordKey) >= 0 ? maxRecordKey : recordKey;
} else {
maxRecordKey = recordKey;
}
}
}