Data Migration

Data Warehouse Migration from Teradata to AWS Redshift


An American company that franchises and operates a chain of restaurants needed to migrate their on-premise Data Warehouse (Teradata Database) to AWS Cloud Infrastructure (Redshift Database)

Client Challenges and Requirements

  • Large volume of data. Approx. size of data to be migrated was 8TB
  • Data field mapping issues
  • Time duration for entire Migration
  • Large size of few fact tables
  • Data Validation

Bitwise Solution

Bitwise recommended Amazon SCT for converting schema and loading chunks of data for large fact tables by applying
conditions for source data. Resolved data issues faced earlier while migrating with R programming using SCT. Time duration
was an important constraint for entire migration. Recommended parallel tasks in SCT for processing different chunks of data
resulting in faster migration of data.

  • Datatype
  • Data length
  • Stratification (Sum of amount fields)

Implementation Included:

  • Systematic migration of entire Data Warehouse including all dimension / fact
  • Data Validation for all tables
  • Parallel tasks in SCT for speeding up the migration process

Tools & Technologies We Used

Amazon SCT
Aginity for Redshfit
Amazon S3

Key Results

Reduced maintenance and operating costs for Data Warehouse

Faster execution of queries in comparison with previous setup

The deployment time was reduced from 24 hours to less than an hour

Enhanced Business Operations

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