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Explain DB File Sequential Read Oracle to PostgreSQL migration approach AWS DMS validation strategy PostgreSQL VACUUM troubleshooting RAC Cache Fusion architecture
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Sibsankar Mitra
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Expert in Oracle, PostgreSQL and AWS cloud migrations. Built DBStackAI so every DBA gets expert answers instantly.
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RDS, Aurora, DMS, CDC, S3, CloudWatch, MGN, Glue, Amazon Q, Bedrock, SageMaker
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Oracle → PostgreSQL, AWS DMS, zero-downtime strategies
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Migration Hub
Oracle to PostgreSQL · Oracle to Oracle · On-Premises to Cloud
Expert guides covering Oracle, PostgreSQL and cloud migrations.
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Oracle → PostgreSQL
Heterogeneous migration. Schema conversion, PL/SQL to PL/pgSQL, data type mapping, zero downtime strategies.
7 expert guides
✓ Migration Overview
✓ Data Type Mapping
🔒 PL/SQL Conversion Guide PRO
🔒 Cutover Runbook PRO
🔒 Validation Scripts PRO
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Oracle → Oracle
Homogeneous migration. Data Pump, Transportable Tablespaces, AutoUpgrade, GoldenGate, version upgrades.
5 expert guides
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On-Prem → Cloud
Oracle to RDS, Oracle to Aurora PostgreSQL, PostgreSQL to Aurora. CDC replication, DMS, minimal downtime.
5 expert guides
🔧 Migration Tools Quick Reference
ora2pg
Open source Oracle to PostgreSQL migration. Assessment + schema + data conversion.
AWS SCT
Schema Conversion Tool. Converts Oracle schema and PL/SQL to PostgreSQL automatically.
AWS DMS
Database Migration Service. Full load + CDC replication for near-zero downtime migration.
Oracle Data Pump
expdp/impdp. Fastest Oracle-to-Oracle migration. Supports parallel, compression, network mode.
GoldenGate
Real-time CDC replication. Best for near-zero downtime. Expensive but industry standard.
pgBackRest
Production PostgreSQL backup + PITR. Compression, encryption, S3 support, delta restore.
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