What is the timeline for a 9.x to 18.x upgrade?

A typical PostgreSQL 9.x to 18.x upgrade takes 2-6 weeks depending on database size and complexity. We use pg_upgrade for minimal downtime (typically under 1 hour) or logical replication for zero-downtime migrations. The timeline includes assessment (1 week), planning (1 week), testing (1-2 weeks), and execution (1-2 weeks).

How do you ensure zero downtime?

We achieve zero downtime through logical replication, which keeps the source and target databases synchronized in real-time. Applications continue running on the source while we replicate data to the target. Once synchronized, we perform a quick cutover (typically under 30 seconds) by redirecting connections to the new database. We also maintain rollback capabilities throughout the process.

Which cloud platforms do you support?

We support all major cloud platforms including AWS (RDS, Aurora PostgreSQL), Azure (Database for PostgreSQL), Google Cloud (Cloud SQL), and hybrid/multi-cloud architectures. We also handle migrations between cloud providers and from on-premises to cloud environments.

How is data integrity validated?

We use multiple validation methods: row count verification, checksum validation using pg_checksums, foreign key integrity checks, data type consistency verification, and sample data comparison. We also perform automated testing of critical queries and business logic to ensure functional equivalence between source and target databases.

Can you handle cross-database migrations (MySQL to Postgres)?

Yes, we specialize in cross-database migrations including MySQL to PostgreSQL, Oracle to PostgreSQL, and SQL Server to PostgreSQL. We handle schema conversion, data type mapping, stored procedure translation, and application compatibility. Our team has successfully completed hundreds of cross-platform migrations with zero data loss.

What happens if something goes wrong during migration?

We maintain comprehensive rollback procedures throughout the migration. Before cutover, we create full backups and maintain the source database in a ready state. If any issues arise, we can quickly revert to the source database within minutes. We also perform extensive testing in staging environments before production migration to minimize risks.

Do you provide post-migration support?

Yes, we provide 24/7 monitoring and support for 30 days post-migration. This includes performance optimization, issue resolution, query tuning, and knowledge transfer to your team. We also deliver comprehensive documentation covering the new environment, configuration changes, and operational procedures.

Seamless PostgreSQLDatabase Migration Services

Zero Downtime Guaranteed

Migrate PostgreSQL with zero downtime and guaranteed data integrity. Expert upgrades, cloud transitions, and comprehensive risk mitigation through proven methodologies.

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500+

Successful Migrations

Data Loss Incidents

99.9%

Success Rate

2-8

Weeks Timeline

Supported Migration Scenarios

Comprehensive PostgreSQL migration services for every scenario

PostgreSQL Version Upgrades

PostgreSQL 9.x to 18.x Upgrades

Seamless PostgreSQL version upgrades using pg_upgrade utilities, logical replication, and comprehensive compatibility testing for zero-downtime PostgreSQL migration.

• pg_upgrade utilities optimization
• Logical replication upgrades
• Extension compatibility testing
• Feature migration planning
• Performance validation

9.6

Oracle to PostgreSQL

MySQL/Oracle to PostgreSQL Transition

Complete Oracle to PostgreSQL migration with PL/SQL to PL/pgSQL conversion and Oracle-specific feature alternatives for database migration risk mitigation.

• PL/SQL to PL/pgSQL conversion
• Oracle-specific feature alternatives
• Performance optimization
• Schema transformation
• Application compatibility

PL/SQL

Packages

Triggers

SQL Server to PostgreSQL

T-SQL transformation, Windows to Linux migration, and stored procedure conversion for SQL Server transitions with Postgres cross-region migration support.

• T-SQL transformation
• Windows to Linux migration
• Stored procedure conversion
• SSIS to PostgreSQL tools
• Authentication migration

T-SQL

SSIS

Windows

MySQL to PostgreSQL

MyISAM to PostgreSQL conversion with advanced feature adoption and performance enhancement strategies for seamless database migration services.

• MyISAM to PostgreSQL conversion
• Advanced feature adoption
• Performance enhancement
• Data type optimization
• Index strategy migration

MyISAM

InnoDB

JSON

Cloud Platform Migration

AWS RDS & Aurora Migration

AWS RDS/Aurora, Azure Database, Google Cloud SQL migrations with multi-cloud strategies and optimization for PostgreSQL cloud migration expert services.

• AWS RDS/Aurora PostgreSQL
• Azure Database for PostgreSQL
• Google Cloud SQL migrations
• Multi-cloud strategies
• Cost optimization

AWS

Azure

GCP

Legacy System Modernization

Mainframe database migration, application refactoring, and cloud-native transformation for legacy systems with comprehensive database migration services.

• Mainframe database migration
• Application refactoring
• Cloud-native transformation
• COBOL copybook conversion
• Batch processing modernization

Mainframe

COBOL

Batch

Six-Phase Migration Methodology

Proven methodology ensuring zero-downtime migrations with comprehensive risk mitigation

Assessment Phase

Current system analysis, compatibility evaluation, migration complexity assessment, and timeline development.

System Analysis

• Database schema complexity
• Data volume assessment
• Performance baseline
• Extension dependencies
• Security configuration

Compatibility Evaluation

• Version compatibility matrix
• Feature gap analysis
• Application dependencies
• Third-party integrations
• Custom code review

Migration Planning

• Timeline development
• Resource allocation
• Risk assessment
• Success criteria
• Rollback procedures

Planning Phase

Migration strategy design, data mapping, application impact analysis, and testing framework design.

Strategy Design

• Migration approach selection
• Downtime minimization strategy
• Data synchronization plan
• Cutover procedures
• Contingency planning

Impact Analysis

• Application dependency mapping
• Business process impact
• User experience considerations
• Integration point analysis
• Performance impact assessment

Preparation Phase

Environment setup, tool configuration, baseline establishment, and backup procedures implementation.

-- Environment Preparation Script

-- 1. Target environment setup

CREATE DATABASE target_db WITH ENCODING 'UTF8';

-- 2. Extension installation

CREATE EXTENSION IF NOT EXISTS pg_stat_statements;

-- 3. Replication setup

SELECT pg_create_logical_replication_slot('migration_slot', 'pgoutput');

✓ Environment ready for migration

Execution Phase

Incremental migration, real-time synchronization, validation testing, and rollback preparation.

Migration Progress

Schema Migration

Complete

Data Transfer

In Progress

Index Creation

Pending

Real-time Monitoring

Replication lag: 0.2s

Data integrity: 100%

Performance: Optimal

Rollback ready: Yes

Validation Phase

Data integrity verification, performance validation, functional testing, and user acceptance testing.

Data Integrity

• Row count verification
• Checksum validation
• Foreign key integrity
• Data type consistency

Performance Testing

• Query performance
• Load testing scenarios
• Concurrent user simulation
• Resource utilization

Functional Testing

• Application compatibility
• Feature functionality
• Integration testing
• User acceptance

Go-Live Phase

Final cutover, monitoring activation, support coordination, and optimization implementation.

Cutover Process

• Final synchronization
• Application switchover
• DNS updates
• Connection string updates
• Monitoring activation

Post-Migration Support

• 24/7 monitoring setup
• Performance optimization
• Issue resolution
• Knowledge transfer
• Documentation delivery

Data Validation & Risk Mitigation

Comprehensive validation and risk management throughout the migration process

Data Integrity Validation

Extension Compatibility Verification

Multi-layered validation approach ensuring 100% data accuracy and consistency across all migration phases.

Row Count Verification: Automated comparison of row counts across all tables to ensure complete data transfer
Checksum Validation: pg_checksums and custom hash functions to verify data integrity at the byte level
Foreign Key Integrity: Comprehensive validation of all referential integrity constraints
Data Type Consistency: Verification of data type mappings and value ranges
Sample Data Comparison: Statistical sampling and comparison of actual data values

Risk Mitigation Strategies

Schema Merging & Optimization

Proactive risk management with multiple safety nets and rollback capabilities at every stage.

Comprehensive Backups: Full database backups before each migration phase with verified restore procedures
Rollback Procedures: Documented and tested rollback plans with sub-5-minute recovery time objectives
Staging Environment Testing: Complete migration rehearsal in production-like environments
Parallel Running: Source and target databases run in parallel during validation period
24/7 Monitoring: Real-time monitoring with automated alerts for any anomalies

Zero Data Loss Guarantee

Our proven methodology has achieved 500+ successful migrations with zero data loss incidents. We maintain this perfect record through:

100%

Data Integrity Validation

<30s

Cutover Time

<5min

Rollback Time

Specialized Migration Scenarios

Expert handling of complex enterprise migration requirements

Oracle Enterprise to PostgreSQL

Complete Oracle enterprise migration with feature compatibility matrix, PL/SQL conversion strategies, and Oracle-specific alternatives.

PL/SQL Conversion

Advanced

Oracle Packages

Supported

Advanced Queuing

Alternative

Partitioning

Enhanced

SQL Server Integration Services

ETL process migration, SSIS to PostgreSQL tools, and data pipeline modernization for SQL Server environments.

SSIS Packages

Converted

Data Flows

Modernized

Scheduling

pg_cron

Error Handling

Enhanced

Legacy Mainframe Migration

COBOL copybook conversion, batch processing modernization, and real-time system transformation from mainframe environments.

COBOL Copybooks

Converted

Batch Processing

Modernized

Real-time Systems

Transformed

Data Formats

Standardized

Multi-Database Consolidation

System integration, data harmonization, and API standardization for multiple database consolidation projects.

Schema Integration

Unified

Data Harmonization

Complete

API Standardization

RESTful

Performance

Optimized

Migration Tools & Technologies

Comprehensive toolset for every migration scenario

PostgreSQL Native Tools

• pg_dump/pg_restore optimization
• Logical replication setup
• pg_upgrade utilities
• Foreign data wrappers
• pg_basebackup streaming

Third-Party Migration Tools

• Ora2Pg for Oracle migration
• pgloader for data loading
• AWS Schema Conversion Tool
• Azure Database Migration Service
• Google Database Migration Service

Custom Migration Solutions

• ETL pipeline development
• Data transformation scripts
• Validation frameworks
• Monitoring dashboards
• Automated testing suites

Success Stories & Reviews

Real-world results from our PostgreSQL migration projects

4.8/5(47 reviews)

Lead Architect

September 15, 2025

"JusDB delivered a flawless zero-downtime migration to Aurora PostgreSQL with no data loss. Their six-phase methodology and attention to detail gave us complete confidence throughout the process."

CTO, SaaS Company

August 20, 2025

"Their six-phase methodology ensured complete compliance and performance validation post-migration. The team's expertise in handling complex Oracle to PostgreSQL migrations was exceptional."

Fortune 500 Financial Institution

Oracle to PostgreSQL

Complete Oracle to PostgreSQL migration for core banking system with zero downtime and enhanced performance.

Annual Savings$2M

Performance Improvement30%

Migration Timeline6 weeks

Downtime0 hours

Healthcare Network

SQL Server to PostgreSQL

SQL Server to PostgreSQL migration with HIPAA compliance maintenance and zero data loss achievement.

Data Loss0 records

ComplianceHIPAA Maintained

Cost Reduction40%

Migration Timeline4 weeks

E-commerce Platform

Multi-Database Consolidation

Multi-database consolidation with system integration and 50% infrastructure cost reduction.

Infrastructure Savings50%

System Integration5 databases

Performance Gain25%

Migration Timeline8 weeks

Frequently Asked Questions

Common questions about our PostgreSQL migration services

Ready for Your PostgreSQL Migration?

Get a comprehensive migration assessment and detailed project plan. Zero-downtime guarantee with expert support throughout the process.

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