Single service comparison

Huawei splits managed relational databases across multiple products rather than one engine-agnostic service. RDS (e.g. RDS for MySQL, RDS for PostgreSQL) is the closest engine-by-engine managed equivalent for MySQL/PostgreSQL/Microsoft SQL Server workloads. TaurusDB is a separate MySQL-compatible, cloud-native decoupled-storage engine for higher concurrency, and GaussDB (openGauss-kernel) is Huawei's enterprise distributed database for mission-critical, strong-consistency, large-data scenarios. AWS RDS consolidates these into one control plane; Huawei offers distinct boundaries, APIs, and engines per product, so target selection depends on engine affinity, scale, and consistency needs.

Scaling and HA differ materially. AWS RDS uses multi-AZ synchronous standby with automatic failover and read replicas, with Aurora offering a shared-storage distributed design. RDS for MySQL uses primary/standby with sub-60-second RTO hot standby and read replicas; GaussDB provides dual-cluster strong consistency with RPO=0 across AZs and online scale-out to over 1,000 nodes in a distributed instance; TaurusDB targets MySQL-compatible scale with decoupled storage. Replication modes and failover transparency vary by Huawei product, so AWS multi-AZ topology assumptions do not map one-to-one.

Integration and operational responsibility diverge. AWS couples RDS to CloudWatch, RDS Proxy, Performance Insights, IAM, and Aurora Serverless. Huawei integrates RDS/GaussDB with DAS (Data Admin Service), Cloud Eye, LTS, DRS for migration/synchronization, and UGO for schema assessment and conversion. DBSS covers database security auditing. Operators moving from AWS must re-link monitoring, backup retention, parameter tuning, and IAM-style access control to Huawei equivalents, and accept that engine feature parity (e.g. Aurora-specific capabilities, SQL Server/Oracle options, serverless v2) is not guaranteed across Huawei targets.

Start with assessment and target selection by engine. Map each AWS RDS engine to the closest Huawei managed target: MySQL or PostgreSQL workloads match RDS for MySQL / RDS for PostgreSQL; high-concurrency MySQL needs map to TaurusDB; Oracle/SQL Server or distributed, strong-consistency, large-data workloads may target GaussDB, which uses UGO for pre-migration evaluation and schema syntax conversion. Validate engine version, edition, collation, parameter, and feature compatibility per target, since cross-engine migration (e.g. Oracle to GaussDB) is a conversion project, not a restore.

For data and schema migration, use DRS for online heterogeneous or homogeneous migration with full plus incremental capture to minimize cutover downtime. DRS supports over 20 source databases, pre-checks hundreds of migration items, provides object filtering, latency monitoring, and data comparison, and is the documented path for migrating other-cloud MySQL databases to RDS for MySQL. Pair DRS with UGO when targeting GaussDB so schema, views, triggers, and procedural objects are converted to openGauss syntax before the DRS data move.

Validate before cutover using DRS workload replay to capture production traffic and replay against the target to surface slow or incompatible SQL and performance gaps ahead of cutover. Run data consistency comparison and synchronization delay monitoring, then cut over during a planned window, keeping rollback available via the source instance until verification completes. Re-point application connection strings, reconfigure clients for Huawei endpoints/SSL, and update parameter groups to match AWS behavior as closely as the target supports.

Account for cost and gap changes. AWS RDS typically bills instance/serverless runtime, storage, I/O, backup retention beyond free tier, and data transfer; Huawei bills the target RDS/GaussDB/TaurusDB instance runtime, DRS task billing, storage, backup, and transfer, with separate consideration for UGO and DBSS if used. Recalculate TCO against peak load, request volume, retention, and cross-region/interconnect traffic. Document gaps such as AWS-specific Aurora features, RDS Proxy, Performance Insights, and Microsoft SQL Server/Oracle availability, and plan Huawei-side equivalents or compensating controls before production migration.