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From "Hong Shen (Jira)" <j...@apache.org>
Subject [jira] [Created] (HUDI-657) It's lots of ClientUtils.createMetaClient when write to hudi
Date Thu, 05 Mar 2020 02:42:00 GMT
Hong Shen created HUDI-657:
------------------------------

             Summary: It's lots of ClientUtils.createMetaClient when write to hudi
                 Key: HUDI-657
                 URL: https://issues.apache.org/jira/browse/HUDI-657
             Project: Apache Hudi (incubating)
          Issue Type: Bug
            Reporter: Hong Shen


When I write data to hudi, I find it's lots of loading table properties log, and each take 
about 75ms, like below. 

{code}
20/03/05 09:20:32.379 INFO FSUtils: Hadoop Configuration: fs.defaultFS: [file:///], Config:[Configuration:
core-default.xml, core-site.xml, mapred-default.xml, mapred-site.xml, yarn-default.xml, yarn-site.xml],
FileSystem: [org.apache.hadoop.fs.aliyun.oss.AliyunOSSFileSystem@563f38c4]
20/03/05 09:20:32.431 INFO HoodieTableConfig: Loading table properties from oss://shenhong-test/mr_100_100_100/.hoodie/hoodie.properties
20/03/05 09:20:32.453 INFO HoodieTableMetaClient: Finished Loading Table of type MERGE_ON_READ(version=1)
from oss://shenhong-test/mr_100_100_100

{code}

It's seems we have to create HoodieTableMetaClient when we use it.  but it's not need to
do that, eg, when we call  getHoodieTable, it transfer metaClient, but the constructed function
in HoodieTable still createMetaClient .

{code}
public static <T extends HoodieRecordPayload> HoodieTable<T> getHoodieTable(HoodieTableMetaClient
metaClient,
 HoodieWriteConfig config, JavaSparkContext jsc) {
 switch (metaClient.getTableType()) {
 case COPY_ON_WRITE:
 return new HoodieCopyOnWriteTable<>(config, jsc);
 case MERGE_ON_READ:
 return new HoodieMergeOnReadTable<>(config, jsc);
 default:
 throw new HoodieException("Unsupported table type :" + metaClient.getTableType());
 }
}

{code}

{code}
  protected HoodieTable(HoodieWriteConfig config, JavaSparkContext jsc) {
    this.config = config;
    this.hadoopConfiguration = new SerializableConfiguration(jsc.hadoopConfiguration());
    this.viewManager = FileSystemViewManager.createViewManager(new SerializableConfiguration(jsc.hadoopConfiguration()),
        config.getViewStorageConfig());
    this.metaClient = ClientUtils.createMetaClient(jsc, config, true);
    this.index = HoodieIndex.createIndex(config, jsc);
  }

{code}

 I can optimize it if it need.




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