Struct ShardMetadata 

pub struct ShardMetadata {
    pub key: ShardKey,
    pub owner_node: String,
    pub size_bytes: u64,
    pub state: ShardState,
    pub updated_at_ms: u64,
}

Metadata about a single shard.

Fields

key: ShardKey

The shard’s key.

owner_node: String

Physical node currently responsible for this shard.

size_bytes: u64

Approximate size in bytes.

state: ShardState

Current lifecycle state.

updated_at_ms: u64

Unix epoch ms when this metadata was last updated.

Implementations

impl ShardMetadata

pub fn new( key: ShardKey, owner_node: impl Into<String>, size_bytes: u64, now_ms: u64, ) -> Self

Create a new active shard metadata record.

pub fn begin_migration(&mut self, target_node: impl Into<String>, now_ms: u64)

Mark the shard as migrating to target_node.

pub fn complete_migration(&mut self, now_ms: u64)

Complete the migration (shard is now active on the new node).

pub fn is_active(&self) -> bool

Returns true if the shard is currently active.

Trait Implementations

impl Clone for ShardMetadata

fn clone(&self) -> ShardMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ShardMetadata

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

Formats the value using the given formatter.