Struct MultipleCopyFileAllocation 

pub struct MultipleCopyFileAllocation { /* private fields */ }

Multiple Copy File Allocation problem.

Given an undirected graph G = (V, E), a usage value u(v) for each vertex, and a storage cost s(v) for each vertex, find a subset V’ of copy vertices that minimizes:

Σ_{v ∈ V’} s(v) + Σ_{v ∈ V} u(v) · d(v, V’)

where d(v, V’) is the shortest-path distance from v to the nearest copy in V’.

Implementations

impl MultipleCopyFileAllocation

pub fn new(graph: SimpleGraph, usage: Vec<i64>, storage: Vec<i64>) -> Self

Create a new Multiple Copy File Allocation instance.

pub fn graph(&self) -> &SimpleGraph

Get a reference to the underlying graph.

pub fn usage(&self) -> &[i64]

Get the usage values.

pub fn storage(&self) -> &[i64]

Get the storage costs.

pub fn num_vertices(&self) -> usize

Get the number of vertices.

pub fn num_edges(&self) -> usize

Get the number of edges.

pub fn total_cost( &self, config: &[bool], ) -> Result<Option<i64>, EvaluationError>

Compute the total storage plus access cost for a configuration.

Returns None if the configuration is not binary, has the wrong length, selects no copy vertices, or leaves some vertex unreachable from every copy.

pub fn is_valid_solution( &self, config: &[bool], ) -> Result<bool, EvaluationError>

Check whether a configuration is a valid placement (at least one copy, all reachable).

Trait Implementations

impl BruteForceProblem for MultipleCopyFileAllocation

fn dimensions(&self) -> Vec<usize>

Cardinality of each coordinate in the brute-force search space.

fn num_variables(&self) -> usize

Number of coordinates in the brute-force search space.

impl Clone for MultipleCopyFileAllocation

fn clone(&self) -> MultipleCopyFileAllocation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MultipleCopyFileAllocation

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

Formats the value using the given formatter.

impl DeclaredVariant for MultipleCopyFileAllocation

impl<'de> Deserialize<'de> for MultipleCopyFileAllocation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Problem for MultipleCopyFileAllocation

const NAME: &'static str = "MultipleCopyFileAllocation"

Base name of this problem type (e.g., “MaximumIndependentSet”).

type Solution = Vec<bool>

Mathematical witness type for this problem.

type Value = Min<i64>

The evaluation value type.

fn parameter_names() -> &'static [&'static str]

Canonical parameter names for this problem model.

fn parameters(&self) -> ProblemParameters

Measure the complete canonical parameters of this concrete instance.

fn variant() -> Vec<(&'static str, &'static str)>

Returns variant attributes derived from type parameters.

fn evaluate(&self, config: &Self::Solution) -> Result<Min<i64>, EvaluationError>

Evaluate the problem on a solution.

fn problem_type() -> ProblemType

Look up this problem’s catalog entry.

impl ReduceTo<ILP> for MultipleCopyFileAllocation

type Result = ReductionMCFAToILP

The reduction result type.

fn reduce_to(&self) -> Result<Self::Result, ReductionError>

Reduce this problem to the target problem type.

fn target_construction(error: ConstructionError) -> ReductionError

where Self: Sized,

Attach this reduction edge to a target-construction failure.

fn exact_i64( value: usize, operation: impl Into<String>, ) -> Result<i64, ReductionError>

where Self: Sized,

Convert a structural count used by the target’s exact integer algebra.

impl Serialize for MultipleCopyFileAllocation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.