Rajesh Balamohan created HIVE-6872:
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Summary: Explore options of optimizing
FileSinkOperator-->getDynOutPaths()
Key: HIVE-6872
URL: https://issues.apache.org/jira/browse/HIVE-6872
Project: Hive
Issue Type: Bug
Reporter: Rajesh Balamohan
Priority: Critical
1. Download hive-testbench from https://github.com/cartershanklin/hive-testbench
2. Generate data using "./tpcds-setup.sh 10 /user/hive/external partitioned"
3. Most of the data population for tables with "partition + bucket + sorted
data" will run a lot slower even with scale factor of 10 on 20 node cluster.
Bottleneck seems to be in FileSinkOperator-->getDynOutPaths() where it tries to
close FSPath writers. Every call takes almost 150-200 ms.
set hive.enforce.bucketing=true;
set hive.exec.dynamic.partition.mode=nonstrict;
set hive.exec.max.dynamic.partitions.pernode=4096;
With the above setting, one of the data loading (for web_sales table) took
almost 4096 * 150 = 600 seconds in closing the writers sequentially.
Purpose of this jira is to figure out options of optimizing this code path.
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