重要なポイント
- Privacy: Data never leaves your infrastructure. Critical for HIPAA, GDPR, financial services.
- Cost: No per-token API fees. One-time hardware investment ($3k–50k), then free queries.
- Compliance: Full audit trails, data residency control, no vendor lock-in.
- Speed: Inference on local hardware = lower latency than cloud (if well-optimized).
- As of April 2026, on-premises AI is economically viable for organizations processing 100M+ tokens/month.
Why Deploy Local AI Instead of Cloud APIs?
| Factor | Cloud API | On-Premises AI |
|---|---|---|
| Data privacy | Data sent to vendor | — |
| Compliance | Limited control | — |
| Cost (annual) | $100k–500k (at scale) | — |
| Latency | 200–500ms | — |
| Model choice | Limited to vendor models | — |
Compliance: GDPR, HIPAA, and SOC2
GDPR (EU): Data must not leave EU. Local AI ensures compliance if infrastructure is EU-based.
HIPAA (Healthcare): Patient data cannot be sent to third-party APIs. Local AI required for healthcare deployments.
SOC2 (Enterprise): Audit trails, encryption, access controls. Local AI gives you full compliance control.
Document your deployment: encryption at rest/in transit, access logs, data retention policies.
On-Premises AI Architecture
Typical deployment: Kubernetes cluster running vLLM inference pods, with Qdrant vector DB for RAG.
yaml
# Example: Kubernetes deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: local-llm-inference
spec:
replicas: 3
template:
spec:
containers:
- name: vllm
image: vllm/vllm-openai:latest
args:
- --model meta-llama/Llama-2-13b-hf
- --tensor-parallel-size 2
ports:
- containerPort: 8000
resources:
limits:
nvidia.com/gpu: "2" # 2 GPUs per podCost Breakdown: Cloud vs Local
| Scenario | Cloud API Cost | On-Premises AI Cost |
|---|---|---|
| 10M tokens/month | — | — |
| 100M tokens/month | — | — |
| 1B tokens/month | — | — |
| Hardware cost (amortized/month) | — | — |
| Break-even point | — | — |
Use Cases by Industry
- Healthcare: Medical NLP (document classification, note summarization) on HIPAA-compliant infrastructure.
- Finance: Compliance analysis, risk assessment, without sending data to cloud.
- Legal: Document review, contract analysis, with full audit trails for regulatory requirements.
- Manufacturing: Predictive maintenance, quality control, keeping proprietary data on-premises.
- Government: Classified document processing, restricted to secure facilities.
Common Deployment Mistakes
- Underestimating infrastructure costs. Hardware is cheap; networking, cooling, and maintenance are expensive. Budget 3–5× hardware cost over 5 years.
- Not planning for scaling. Start small, then plan for growth. Single-GPU setup cannot scale to production.
- Ignoring disaster recovery. Have backup hardware and data replication. Outages cost more than redundancy.
- Poor security posture. Network isolation, encryption, and access controls are critical. Audit regularly.
- Using old open-source models. Models from 2023 are outdated. Retrain or fine-tune regularly as new base models emerge.
Sources
- GDPR Official Text — gdpr-info.eu
- HIPAA Compliance — hhs.gov/hipaa
- SOC2 Framework — aicpa.org/soc2