[HIVE-4765] Improve HBase bulk loading facility

• Type: Improvement
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: HBase Handler
• Assignee: Navis Ryu
• Reporter: Navis Ryu
• Created: 20/Jun/13 02:14
• Updated: 09/May/15 00:11

Description

With some patches, bulk loading process for HBase could be simplified a lot.

CREATE EXTERNAL TABLE hbase_export(rowkey STRING, col1 STRING, col2 STRING)
ROW FORMAT SERDE 'org.apache.hadoop.hive.hbase.HBaseExportSerDe'
WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key,cf1:key,cf2:value")
STORED AS
  INPUTFORMAT 'org.apache.hadoop.mapred.TextInputFormat'
  OUTPUTFORMAT 'org.apache.hadoop.hive.hbase.HiveHFileExporter'
LOCATION '/tmp/export';

SET mapred.reduce.tasks=4;
set hive.optimize.sampling.orderby=true;

INSERT OVERWRITE TABLE hbase_export
SELECT * from (SELECT union_kv(key,key,value,":key,cf1:key,cf2:value") as (rowkey,union) FROM src) A ORDER BY rowkey,union;

hive> !hadoop fs -lsr /tmp/export;                                                                                          
drwxr-xr-x   - navis supergroup          0 2013-06-20 11:05 /tmp/export/cf1
-rw-r--r--   1 navis supergroup       4317 2013-06-20 11:05 /tmp/export/cf1/384abe795e1a471cac6d3770ee38e835
-rw-r--r--   1 navis supergroup       5868 2013-06-20 11:05 /tmp/export/cf1/b8b6d746c48f4d12a4cf1a2077a28a2d
-rw-r--r--   1 navis supergroup       5214 2013-06-20 11:05 /tmp/export/cf1/c8be8117a1734bd68a74338dfc4180f8
-rw-r--r--   1 navis supergroup       4290 2013-06-20 11:05 /tmp/export/cf1/ce41f5b1cfdc4722be25207fc59a9f10
drwxr-xr-x   - navis supergroup          0 2013-06-20 11:05 /tmp/export/cf2
-rw-r--r--   1 navis supergroup       6744 2013-06-20 11:05 /tmp/export/cf2/409673b517d94e16920e445d07710f52
-rw-r--r--   1 navis supergroup       4975 2013-06-20 11:05 /tmp/export/cf2/96af002a6b9f4ebd976ecd83c99c8d7e
-rw-r--r--   1 navis supergroup       6096 2013-06-20 11:05 /tmp/export/cf2/c4f696587c5e42ee9341d476876a3db4
-rw-r--r--   1 navis supergroup       4890 2013-06-20 11:05 /tmp/export/cf2/fd9adc9e982f4fe38c8d62f9a44854ba

hbase org.apache.hadoop.hbase.mapreduce.LoadIncrementalHFiles /tmp/export test

Issue Links

• is blocked by: HIVE-1402 Add parallel ORDER BY to Hive
• links to: review board