Node Disk Usage Forecaster

WHAT IT DOES

The Node Disk Usage Forecaster is an analytics tool that projects future storage requirements for Ethereum nodes based on block number growth and average block size. It fetches the current block number from your connected RPC provider, calculates estimated disk usage growth per month, and generates a multi-month forecast of storage needs. The tool provides detailed projections including expected disk usage, percentage of capacity, remaining free space, and estimated time until the node's disk becomes full. This helps node operators, developers, and infrastructure teams plan storage upgrades, optimize node configurations, and prevent unexpected storage exhaustion that could cause node downtime.

HOW TO USE

Connect your wallet to establish an RPC provider connection. Configure the average block size in KB (default 15 KB, adjustable based on your network), current disk usage in GB, total disk space in GB, and the forecast period in months. Click "generate forecast" to produce a detailed report. Results include current status metrics, a monthly projection table showing usage over time, capacity bar visualizations, and specific recommendations based on your forecast. The tool warns if disk usage is expected to exceed 90% capacity within the forecast period and provides actionable guidance on storage management.

TECHNICAL MECHANISM

The tool fetches the current block number from the connected RPC provider using eth_blockNumber. It then calculates the estimated number of blocks added per month based on average block time (12 seconds per block for Ethereum). Using the user-provided average block size in KB, it computes the monthly growth in gigabytes: (blocksPerMonth × avgBlockSizeKB) / (1024 × 1024). The tool then generates a projection array for each month of the forecast period, adding the monthly growth to the initial disk usage and calculating the corresponding block number. For each month, it computes disk usage in GB, percentage of total capacity used, remaining free space, and estimated months until full. The projection table displays selected months to provide a clear view of the growth trajectory while keeping the output manageable. The tool also provides a capacity bar visualization and a health assessment based on the forecasted usage.

WHAT IT CANNOT SEE

The tool cannot access actual disk usage data from the node or measure actual blockchain size growth beyond estimates. It cannot account for pruning, garbage collection, or other storage optimization strategies that reduce disk usage over time. The tool cannot predict changes in block size or transaction volume that may accelerate or decelerate growth. It cannot account for state growth versus historical data growth, which vary significantly between full nodes and archive nodes. The tool cannot validate whether the node is using archive mode, which dramatically increases storage requirements. It cannot detect disk fragmentation or actual available space, nor can it predict when the node will fail due to storage exhaustion without actual disk monitoring.

PLEASE NOTE

This tool is designed for Ethereum Virtual Machine (EVM) compatible chains only. The 12-second block time assumption is for Ethereum mainnet; other chains may have different block times and should be adjusted accordingly. The average block size estimate (default 15 KB) is a rough approximation that varies significantly based on network activity. The tool provides estimates only and should not be used as the sole basis for infrastructure planning. For production nodes, combine this with actual disk monitoring and adjust block size assumptions based on historical data. The tool assumes linear growth, which may not reflect actual network behavior.