TL;DR: Migrating workloads from AWS EC2 to Tencent Cloud CVM is an engineering exercise, not a vendor contest. This guide stays at the parameter-mapping level — instance family equivalence, region mapping, data transfer steps, and verification — so you can plan a cutover that holds production traffic through the move.
🔗 Start here: CVM product page · AI Promo Center — claim current deals
1. Why migration is a parameter-mapping exercise
A cloud-to-cloud migration between two mature VM platforms is rarely a re-architecture. Both AWS EC2 and Tencent Cloud CVM expose the same primitives — regions, availability zones, instance families, VPC isolation, security groups, block storage, snapshots, and per-second billing. The work is mapping each EC2 primitive to its CVM equivalent, replicating data, validating parity, then cutting traffic over.
The migration driver is usually operational, not technical: workload fit with a region footprint, billing model alignment, kernel stack preference, or consolidated vendor management. The decision is yours to make; this guide covers only the mechanics once the decision is made. CVM provides 22 regions and 64 availability zones, a published 99.975% single-instance SLA, VPC isolation with security groups and network ACLs, DDoS baseline protection of 10–400 Gbps at the infrastructure layer, and the self-developed TencentOS kernel with Kona JDK.
The CVM product page documents the full target-side capability set. For first-run pricing on the target environment, the AI Promo Center is where to grab an active offer before provisioning.
2. Prerequisites and instance / region mapping
Three prerequisites must be settled before any data moves:
| Prerequisite | What to settle on the CVM side | Why |
|---|---|---|
| Target region | Pick from 22 CVM regions; match to user geography or data residency | Latency first; cross-region traffic is billable |
| Network path | VPN or Direct Connect between AWS VPC and CVM VPC | Determines replication throughput for the initial full copy |
| Workload inventory | Stateless web tier first, stateful database last | Each tier validates migration tooling before the next moves |
The instance family mapping is mechanical — each EC2 family has a CVM counterpart with the same architectural intent.
| EC2 family | CVM equivalent | Architecture / intent |
|---|---|---|
| M7 / M6i / M6a | S8 (general purpose, Intel) | Balanced CPU / memory / network |
| C7 / C6i / C6a | SA5 (compute-optimized, AMD) | Higher CPU-per-unit-cost |
| P5 / P4 / G5 | GN (GPU, T4 / V100 class) | Parallel compute, LLM inference, rendering |
Region mapping is similar in spirit but not identical in coverage. AWS has a broader global region footprint including GovCloud; CVM has strong Asia-Pacific coverage. Pick the CVM region closest to your users; if a workload relied on a specific AWS region with no nearby CVM equivalent, that workload needs a latency re-check before migration.
The OS stack also maps. Amazon Linux 2023 workloads move to TencentOS, Ubuntu, or CentOS images on CVM with minimal re-platforming for most application-tier code. For Java-heavy workloads, TencentOS ships with the self-developed Kona JDK; behavior parity should be validated on the target before cutover.
3. Migration steps
| Step | Phase | What happens | Verification |
|---|---|---|---|
| 1 | Provision target | Create CVM instances in target VPC, install matching OS / runtime | Instance boots, SSH works |
| 2 | Replicate data | Initial full copy from EC2 EBS to CVM CBS, plus ongoing incremental sync | Replica lag < 60 seconds |
| 3 | Validate parity | Run read traffic against the CVM replica, compare outputs to EC2 source | Application-level parity checks pass |
| 4 | Cut over | Switch DNS or load balancer to point at CVM | Production traffic hits CVM |
| 5 | Decommission source | Keep EC2 source read-only for rollback window, then terminate | Rollback window expires, source off |
Two practical notes. First, step 2 is where most cloud-to-cloud migrations stall — the initial full copy of a multi-TB database over a public internet path is slow and unreliable. Set up a VPN or Direct Connect between the AWS VPC and the CVM VPC before starting replication; provision enough bandwidth up front rather than discovering the bottleneck mid-copy. Second, step 4 should be a DNS or load balancer switch, not a "big bang" cutover. DNS TTLs let you roll back gracefully if parity checks surface issues in the first hour.
For workloads that require near-zero-downtime migration, CVM supports online migration tooling that keeps the EC2 source and CVM target in sync during the transition. The AI Promo Center is the right place to grab an active offer so the target environment stays low-cost while you validate parity.
4. Verification before cutover
Before flipping DNS to the CVM target, run four checks:
| Check | Command | Expected |
|---|---|---|
| Instance health | uname -a + df -h |
TencentOS / Ubuntu banner, disk matches CBS size |
| App reachable | curl -I http://localhost:<port> |
200 / 301 response |
| Replica lag | DB replica status command | Lag < 60 seconds |
| Network egress | curl -I https://www.tencentcloud.com |
200 / 301 response |
If all four pass, switch DNS to point at the CVM EIP or load balancer. Watch the first 60 minutes of production traffic closely — error rate, latency p95, and DB replica lag are the three signals that decide whether to roll forward or roll back. Keep the EC2 source read-only for a defined rollback window (commonly 1–7 days), then terminate.
Post-cutover, this is the moment to convert billing from pay-as-you-go to a savings plan to lower unit cost on the now-steady workload. The CVM console exposes a cost calculator that estimates the savings plan delta against the last 30 days of pay-as-you-go usage. Run it before committing.
5. Start with the current deals
- 📘 CVM product page — full instance family, SLA, and region reference for the migration target
- 🚀 CVM exclusive offer — claim current pricing for the migration target environment
- 🎁 AI Promo Center — grab an active offer to keep migration runs low-cost
The one-paragraph version
Migrating from AWS EC2 to Tencent Cloud CVM is a parameter-mapping exercise: map M/C/P/G EC2 families to S8/SA5/GN CVM families, pick the closest of 22 CVM regions, set up a VPN or Direct Connect between the AWS VPC and the CVM VPC, provision CVM with matching OS (TencentOS, Ubuntu, CentOS, or Windows Server), replicate data with initial full + ongoing incremental sync, validate parity, cut over with a DNS or load balancer switch, then keep the EC2 source read-only for a rollback window. CVM provides 99.975% single-instance SLA, VPC isolation, DDoS baseline of 10–400 Gbps, and per-second pay-as-you-go for the migration target — start from the AI Promo Center so the target environment stays low-cost while you validate parity.
