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homelab-design/diagrams/storage-strategy.mmd

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```plaintext
%% Tiered Storage Strategy (ADR-0026)
%% C4 Component diagram showing Longhorn + NFS dual-tier
flowchart TB
subgraph tier1["🚀 TIER 1: LONGHORN (Fast Distributed Block)"]
direction TB
subgraph nodes["Cluster Nodes"]
direction LR
khelben["🖥️ khelben<br/>/var/mnt/longhorn<br/>NVMe"]
mystra["🖥️ mystra<br/>/var/mnt/longhorn<br/>SSD"]
selune["🖥️ selune<br/>/var/mnt/longhorn<br/>SSD"]
end
longhorn_mgr["⚙️ Longhorn Manager<br/>(Schedules 2-3 replicas)"]
subgraph longhorn_pvcs["Performance Workloads"]
direction LR
pg["🐘 PostgreSQL"]
vault["🔐 Vault"]
prom["📊 Prometheus"]
click["📋 ClickHouse"]
end
end
subgraph tier2["💾 TIER 2: NFS-SLOW (High-Capacity Bulk)"]
direction TB
nas["🗄️ candlekeep.lab.daviestechlabs.io<br/>External NAS<br/>/kubernetes"]
nfs_csi["📂 NFS CSI Driver"]
subgraph nfs_pvcs["Bulk Storage Workloads"]
direction LR
jellyfin["🎬 Jellyfin<br/>(1TB+ media)"]
nextcloud["☁️ Nextcloud"]
immich["📷 Immich"]
kavita["📚 Kavita"]
mlflow["📈 MLflow<br/>Artifacts"]
ray_models["🤖 Ray<br/>Model Weights"]
end
end
%% Tier 1 connections
nodes --> longhorn_mgr
longhorn_mgr --> longhorn_pvcs
%% Tier 2 connections
nas --> nfs_csi
nfs_csi --> nfs_pvcs
classDef tier1_node fill:#3498db,color:white
classDef tier1_mgr fill:#2980b9,color:white
classDef tier1_pvc fill:#1abc9c,color:white
classDef tier2_nas fill:#e74c3c,color:white
classDef tier2_csi fill:#c0392b,color:white
classDef tier2_pvc fill:#f39c12,color:black
class khelben,mystra,selune tier1_node
class longhorn_mgr tier1_mgr
class pg,vault,prom,click tier1_pvc
class nas tier2_nas
class nfs_csi tier2_csi
class jellyfin,nextcloud,immich,kavita,mlflow,ray_models tier2_pvc
```