[PARQUET-1680] Parquet Java Serialization is very slow

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.10.1
• Component/s: parquet-avro, parquet-mr
• Assignee: Unassigned
• Reporter: Felix Kizhakkel Jose
• Created: 16/Oct/19 18:56
• Updated: 28/Oct/19 20:02

Description

Hi,
I am doing a POC to compare different data formats and its performance in terms of serialization/deserialization speed, storage size, compatibility between different language etc. 
When I try to serialize a simple java object to parquet file,  it takes 6-7 seconds vs same object's serialization to JSON is 100 milliseconds.

Could you help me to resolve this issue?

+My Configuration and code snippet:
Gradle dependencies
dependencies

{ compile group: 'org.springframework.boot', name: 'spring-boot-starter' compile group: 'org.projectlombok', name: 'lombok', version: '1.16.6' compile group: 'com.amazonaws', name: 'aws-java-sdk-bundle', version: '1.11.271' compile group: 'org.apache.parquet', name: 'parquet-avro', version: '1.10.0' compile group: 'org.apache.hadoop', name: 'hadoop-common', version: '3.1.1' compile group: 'org.apache.hadoop', name: 'hadoop-aws', version: '3.1.1' compile group: 'org.apache.hadoop', name: 'hadoop-client', version: '3.1.1' compile group: 'joda-time', name: 'joda-time' compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.6.5' compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-joda', version: '2.6.5' }

Code snippet:+

public void serialize(List<D> inputDataToSerialize, CompressionCodecName compressionCodecName) throws IOException {

Path path = new Path("s3a://parquetpoc/data_"+compressionCodecName+".parquet");
Path path1 = new Path("/Downloads/data_"+compressionCodecName+".parquet");
Class clazz = inputDataToSerialize.get(0).getClass();

try (ParquetWriter<D> writer = AvroParquetWriter.<D>builder(path1)
.withSchema(ReflectData.AllowNull.get().getSchema(clazz)) // generate nullable fields
.withDataModel(ReflectData.get())
.withConf(parquetConfiguration)
.withCompressionCodec(compressionCodecName)
.withWriteMode(OVERWRITE)
.withWriterVersion(ParquetProperties.WriterVersion.PARQUET_2_0)
.build()) {

for (D input : inputDataToSerialize)

{ writer.write(input); }

}
}

+Model Used:
@Data
public class Employee

{ //private UUID id; private String name; private int age; private Address address; }

@Data
public class Address

{ private String streetName; private String city; private Zip zip; }

@Data
public class Zip

{ private int zip; private int ext; }

 

private List<Employee> getInputDataToSerialize(){
Address address = new Address();
address.setStreetName("Murry Ridge Dr");
address.setCity("Murrysville");
Zip zip = new Zip();
zip.setZip(15668);
zip.setExt(1234);

address.setZip(zip);

List<Employee> employees = new ArrayList<>();

IntStream.range(0, 100000).forEach(i->

{ Employee employee = new Employee(); // employee.setId(UUID.randomUUID()); employee.setAge(20); employee.setName("Test"+i); employee.setAddress(address); employees.add(employee); }

);
return employees;
}

Note:
I have tried to save the data into local file system as well as AWS S3, but both are having same result - very slow.