Struct DiskSnapshot 

pub struct DiskSnapshot {
    pub device: Box<str>,
    pub model: Option<Box<str>>,
    pub read: MetricState<Rate>,
    pub write: MetricState<Rate>,
    pub read_ops: MetricState<Rate>,
    pub write_ops: MetricState<Rate>,
    pub busy: MetricState<Percent>,
    pub queue_length: MetricState<f32>,
    pub totals: MetricState<DiskTotals>,
    pub mount_points: Vec<Box<str>>,
}

Throughput of one block device.

Contains no capacity fields at all; that is FilesystemSnapshot’s job.

Fields

device: Box<str>

Kernel device name, e.g. nvme0n1 or disk0.

model: Option<Box<str>>

Hardware model, where reported.

read: MetricState<Rate>

Read throughput.

write: MetricState<Rate>

Write throughput.

read_ops: MetricState<Rate>

Read operations per second.

write_ops: MetricState<Rate>

Write operations per second.

busy: MetricState<Percent>

Fraction of wall time the device had at least one request in flight.

§7.3 limits this to platforms where it is semantically correct: it is derived from /proc/diskstats field 10 on Linux and is MetricState::Unsupported elsewhere, because a queue-depth-based approximation on an NVMe device is misleading rather than merely imprecise.

queue_length: MetricState<f32>

Average in-flight request count.

totals: MetricState<DiskTotals>

Cumulative counters.

mount_points: Vec<Box<str>>

Mount points backed by this device, where the mapping is available.

§8.6 puts this expensive mapping in the on-demand tier, so it is often empty in a fast-tier snapshot.

Implementations

impl DiskSnapshot

pub fn warming_up(device: Box<str>) -> Self

A device whose counters exist but whose rates need a second sample.

Trait Implementations

impl Clone for DiskSnapshot

fn clone(&self) -> DiskSnapshot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DiskSnapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for DiskSnapshot

fn eq(&self, other: &DiskSnapshot) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DiskSnapshot