1.
HBase powered Merchant Lookup
Service at Intuit
Vrushali Channapattan, Intuit
Lightning Talk @ HBaseCon2012 (May 22nd, 2012)

2.
About Intuit
Intuit is a leader in this trend
because we are entrusted with the
collective data of our 50 million
customers.
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3.
Problem: Duplicate Merchants
Company ABC Company PQR
name: The Windsor Press, Inc. name: The Windsor Press
address: PO Box 465 6 North Third Street address: P.O. Box 465 6 North 3rd St.
city: Hamburg city: Hamburg
state: PA state: PA
zip: 19526 zip: 19526-0465
phone: (610) 562-2267 phone: (610) 562-2267
Both of the above vendor records map to the D&B business:
ID: 002114902
Name: The Windsor-Press Inc
Street: 6 N 3rd St
City: Hamburg
Dun & State: PA
Bradstreet Zip: 19526-1502
Phone: (610)-562-2267

4.
Applications of Merchant Lookup

5.
Applications of Merchant Lookup

6.
Backend Architecture
Input Applications
Loader
Data
Internal
Research
Projects
Update
Merchant
Splicer
Full table Final
Scan Match Score
Name Phone Address
Individual Score
Matcher
Scores Combiner
Various
Matchers
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7.
Data Model -Tables in HBase
Merchants
 Master dataset of merchants
Sangria_id
Unique id generation coordination across mapper processes
Duplicates
Noting duplicate merchants after deduplication
SnapshotMerchants
Merging into master dataset
NewMerchants
The new merchant set that is to be added to the master data set of
merchants
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8.
Schema
Merchants
Row key Info (column family) Mapping (column
family)
25204939 name:Crepevine sourcename:10000048,
street:367 University Avenue 10000075
city:Palo Alto
state:CA
zip:94031
county:Santa Clara County
country: United States of America
website:www.crepevine.com
phoneNumber:16503233900
latitude:37.430211
longitude:-122.098221
source:internet
mint_category:Food & Dining
qbo_category:Restaurants
NAICS:722110
SIC:5182
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9.
Schema
 Sangria_id
Row key Info (column family)
default seed:30000
comment:initial seed by vc of 1000
qbo seed:20550000
comment:initial seed by kf of 20000000
Duplicates
Row key Info (column family)
10000043 25204921:0.998
10000048 25204939:0.78
10000075 25204939:0.95
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10.
Optimizations (job level)
• For Hadoop jobs interfacing with HBase, used TableMapReduceUtil
• Emitted a ‘put’ from Mapper or Reducer instead of a regular htable put
– Use context.write(rowKey,put)
• To make the full table scan faster (hbase read only hadoop jobs – deduping
matchers , Solr index generator)
 scan.setCaching(500);
 scan.setCacheBlocks(false);
• Used Customized TableInputFormat while scanning (custom number of
splits for map tasks)
job.setInputFormatClass(CustomizedTableInputFormat.class);
extends TableInputFormat class and overriding getSplits
method
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11.
Optimizations (code level)
• Storing frequently used column family and column names as byte arrays in a
public interface
public static final byte[] COLUMN_NAME =
Bytes.toBytes("name");
public static final byte[] COLUMN_FAMILY_INFO =
Bytes.toBytes("info");
• Utility class for getting values from hbase.client.Result
HBaseUtils.getColumnValue(result, COLUMN_FAMILY_INFO,
COLUMN_NAME));
public static String getColumnValue(Result result, byte[]
type, byte[] columnName) {
return Bytes.toString(result.getValue(type,
columnName));
}
• Writing a sample set of 31 million records into the HBase cluster changed
from 4 hours 37 mins 47 secs to 32 mins, 18 seconds
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12.
Thank You!
Vrushali Channapattan, Intuit Data Group (BIO)
vrushali_channapattan@intuit.com
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13.
Schema
 SnapshotMerchants
Row key Info (column family)
merge first:1336813613
start:1337029113
end:1337120100
comments:merging qbo against dandb
merchants initiated on May 14th 2012
outcome:started (or) merge run successful
NewMerchants- same as Merchants
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