resource_tracker/metrics/
disk.rs

1use crate::metrics::{DiskMountMetrics, DiskType};
2use serde::{Deserialize, Serialize};
3
4/// Per-device disk metrics: static identity (cached once) + dynamic throughput
5/// and filesystem space (polled each interval).
6#[derive(Debug, Clone, Serialize, Deserialize)]
7pub struct DiskMetrics {
8    // ------------------------------------------------------------------
9    // Identity - read from /sys/block/<dev>/ once at startup.
10    // ------------------------------------------------------------------
11    pub device: String,
12    /// e.g. "Samsung SSD 870 EVO 1TB", from `/sys/block/<dev>/device/model`.
13    pub model: Option<String>,
14    /// e.g. "ATA", from `/sys/block/<dev>/device/vendor`.
15    pub vendor: Option<String>,
16    /// World-Wide ID or serial, from `/sys/block/<dev>/device/wwid` or `serial`.
17    pub serial: Option<String>,
18    pub device_type: Option<DiskType>,
19    /// Total raw device capacity in bytes (`/sys/block/<dev>/size` × 512).
20    pub capacity_bytes: Option<u64>,
21
22    // ------------------------------------------------------------------
23    // Filesystem space - updated each poll via statvfs(3).
24    // One entry per mount point that belongs to this device.
25    // ------------------------------------------------------------------
26    pub mounts: Vec<DiskMountMetrics>,
27
28    // ------------------------------------------------------------------
29    // Throughput - derived from /proc/diskstats sector deltas.
30    // ------------------------------------------------------------------
31    pub read_bytes_per_sec: f64,
32    pub write_bytes_per_sec: f64,
33    /// Cumulative bytes read since boot (raw /proc/diskstats sector count × 512).
34    /// Matches Python resource-tracker's `disk_read_bytes` column.
35    pub read_bytes_total: u64,
36    /// Cumulative bytes written since boot (raw /proc/diskstats sector count × 512).
37    /// Matches Python resource-tracker's `disk_write_bytes` column.
38    pub write_bytes_total: u64,
39}
resource_tracker/metrics/disk.rs

resource_tracker/metrics/
disk.rs
