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I will do efficient database migration with zero downtime
About this Gig
Expert Database Migration Zero Downtime, Zero Data Loss
Planning a database migration? Worried about data loss or downtime? Let me handle it.
I am an AWS Certified Database Specialist with 9+ years of experience migrating mission-critical databases. I have migrated 5TB+ databases with 100+ parallel replication tasks, achieving near-zero downtime and complete data integrity.
Migrations I Handle
Cross-Platform
- Oracle to PostgreSQL
- SQL Server to PostgreSQL
- MySQL to PostgreSQL
- Any legacy to modern platforms
Cloud Migrations
- On-premises to AWS RDS/Aurora
- On-premises to Google Cloud SQL
- On-premises to Azure SQL
- Cloud to cloud (AWS GCP Azure)
Version Upgrades
- PostgreSQL, MySQL, SQL Server upgrades
- Near-zero downtime using logical replication
What's Included
- Assessment and detailed migration plan
- Complete schema conversion
- Full data migration with validation
- Testing and performance benchmarking
- Cutover with minimal downtime
- Post-migration support and documentation
Tools I Use
AWS DMS, AWS SCT, pgLoader, ora2pg, Debezium, Kafka, Airbyte, and native tools like pg_dump and mysqldump. I select the best approach for your specific needs.
FAQ
What databases do you support?
I support all major databases including PostgreSQL, MySQL, Oracle, SQL Server, MariaDB, Amazon RDS, Aurora, Google Cloud SQL, and Azure SQL. I handle both on-premises and cloud-based databases.
Can you migrate without downtime?
Yes. For most migrations, I use CDC (Change Data Capture) replication to achieve near-zero downtime. The final cutover typically takes only minutes, and I schedule it during your lowest-traffic window.
How do you ensure data integrity?
I perform multiple validation checks including row counts, checksums, schema comparisons, and sample data verification. No migration is complete until data integrity is 100% confirmed.
What if something goes wrong during migration?
Every migration includes a documented rollback plan. If any issue occurs during cutover, I can revert to your original database immediately with no data loss.
How long does a migration take?
Timeline depends on database size and complexity. Small databases take 1-2 days, medium projects take 1-2 weeks, and large enterprise migrations may take 3-4 weeks. I provide exact estimates after assessment.
Do you handle stored procedures and triggers?
Yes. I convert all database objects including tables, views, indexes, constraints, stored procedures, functions, triggers, and sequences. Complex logic is manually reviewed and optimized.
Will my application work after migration?
I test application compatibility before cutover and help identify any queries or code that need adjustment. Most applications work seamlessly with minimal changes.
Do you provide post-migration support?
Yes. All packages include post-migration support for monitoring, troubleshooting, and performance tuning. Extended support is available if needed.
How do you handle large databases?
I have migrated 5TB+ databases using parallel replication with 100+ concurrent tasks. I optimize transfer speeds and schedule migrations to minimize impact on your production systems.
What information do you need to get started?
I need your source and target database platforms, approximate database size, number of schemas/databases, downtime tolerance, and desired timeline. Contact me for a free assessment.
