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1 //! Economic Load Balancer
2 //!
3 //! Load balancing with economic incentives and cost optimization
4
5 use serde::{Deserialize, Serialize};
6 use std::collections::HashMap;
7 use tokio::time::{Duration, Instant};
8
9 #[derive(Debug, Clone, Serialize, Deserialize)]
10 pub struct EconomicLoadBalancer {
11 pub balancer_id: String,
12 pub strategy: LoadBalancingStrategy,
13 pub cost_optimizer: CostOptimizer,
14 pub performance_tracker: PerformanceTracker,
15 pub node_pool: NodePool,
16 pub routing_policies: Vec<RoutingPolicy>,
17 pub economic_metrics: EconomicMetrics,
18 }
19
20 #[derive(Debug, Clone, Serialize, Deserialize)]
21 pub enum LoadBalancingStrategy {
22 CostOptimized, // Minimize total cost
23 PerformanceFirst, // Maximize performance regardless of cost
24 Balanced, // Balance cost vs performance
25 LatencyOptimized, // Minimize response time
26 ThroughputMaximized, // Maximize throughput
27 EnergyEfficient, // Minimize energy consumption
28 RevenueMaximized, // Maximize network revenue
29 }
30
31 #[derive(Debug, Clone, Serialize, Deserialize)]
32 pub struct CostOptimizer {
33 pub optimization_algorithm: OptimizationAlgorithm,
34 pub cost_models: HashMap<String, CostModel>,
35 pub budget_constraints: BudgetConstraints,
36 pub cost_thresholds: CostThresholds,
37 }
38
39 #[derive(Debug, Clone, Serialize, Deserialize)]
40 pub enum OptimizationAlgorithm {
41 GreedyOptimization,
42 DynamicProgramming,
43 GeneticAlgorithm,
44 SimulatedAnnealing,
45 LinearProgramming,
46 MachineLearning,
47 }
48
49 #[derive(Debug, Clone, Serialize, Deserialize)]
50 pub struct CostModel {
51 pub model_name: String,
52 pub cost_components: Vec<CostComponent>,
53 pub cost_function: CostFunction,
54 pub model_accuracy: f64,
55 }
56
57 #[derive(Debug, Clone, Serialize, Deserialize)]
58 pub struct CostComponent {
59 pub component_name: String,
60 pub cost_type: CostType,
61 pub unit_cost: f64,
62 pub scaling_factor: f64,
63 pub minimum_cost: f64,
64 pub maximum_cost: Option<f64>,
65 }
66
67 #[derive(Debug, Clone, Serialize, Deserialize)]
68 pub enum CostType {
69 Fixed, // Fixed cost per time period
70 Variable, // Variable cost per unit
71 Tiered, // Tiered pricing structure
72 Peak, // Peak hour pricing
73 Spot, // Spot pricing (market-based)
74 Reserved, // Reserved capacity pricing
75 }
76
77 #[derive(Debug, Clone, Serialize, Deserialize)]
78 pub struct CostFunction {
79 pub function_type: FunctionType,
80 pub parameters: Vec<f64>,
81 pub constraints: Vec<Constraint>,
82 }
83
84 #[derive(Debug, Clone, Serialize, Deserialize)]
85 pub enum FunctionType {
86 Linear,
87 Quadratic,
88 Exponential,
89 Logarithmic,
90 Piecewise,
91 Custom(String),
92 }
93
94 #[derive(Debug, Clone, Serialize, Deserialize)]
95 pub struct Constraint {
96 pub constraint_name: String,
97 pub constraint_expression: String,
98 pub constraint_type: ConstraintType,
99 }
100
101 #[derive(Debug, Clone, Serialize, Deserialize)]
102 pub enum ConstraintType {
103 Equality,
104 LessThan,
105 GreaterThan,
106 Range,
107 }
108
109 #[derive(Debug, Clone, Serialize, Deserialize)]
110 pub struct BudgetConstraints {
111 pub total_budget: f64,
112 pub budget_periods: Vec<BudgetPeriod>,
113 pub cost_allocation: HashMap<String, f64>,
114 pub overage_policy: OveragePolicy,
115 }
116
117 #[derive(Debug, Clone, Serialize, Deserialize)]
118 pub struct BudgetPeriod {
119 pub period_name: String,
120 pub start_time: Instant,
121 pub end_time: Instant,
122 pub allocated_budget: f64,
123 pub spent_budget: f64,
124 }
125
126 #[derive(Debug, Clone, Serialize, Deserialize)]
127 pub enum OveragePolicy {
128 Block, // Block requests when budget exceeded
129 Alert, // Alert but continue service
130 ScaleDown, // Reduce service capacity
131 BorrowFromNext, // Borrow from next period budget
132 Emergency, // Use emergency budget
133 }
134
135 #[derive(Debug, Clone, Serialize, Deserialize)]
136 pub struct CostThresholds {
137 pub warning_threshold: f64, // % of budget
138 pub critical_threshold: f64, // % of budget
139 pub optimization_trigger: f64, // Cost increase % to trigger optimization
140 pub emergency_threshold: f64, // Emergency action threshold
141 }
142
143 #[derive(Debug, Clone, Serialize, Deserialize)]
144 pub struct PerformanceTracker {
145 pub metrics: HashMap<String, PerformanceMetric>,
146 pub sla_targets: HashMap<String, SLATarget>,
147 pub performance_history: Vec<PerformanceSnapshot>,
148 }
149
150 #[derive(Debug, Clone, Serialize, Deserialize)]
151 pub struct PerformanceMetric {
152 pub metric_name: String,
153 pub current_value: f64,
154 pub target_value: f64,
155 pub weight: f64,
156 pub trend: Trend,
157 }
158
159 #[derive(Debug, Clone, Serialize, Deserialize)]
160 pub enum Trend {
161 Improving,
162 Stable,
163 Degrading,
164 }
165
166 #[derive(Debug, Clone, Serialize, Deserialize)]
167 pub struct SLATarget {
168 pub target_name: String,
169 pub target_value: f64,
170 pub measurement_window: Duration,
171 pub penalty_per_violation: f64,
172 pub current_compliance: f64,
173 }
174
175 #[derive(Debug, Clone, Serialize, Deserialize)]
176 pub struct PerformanceSnapshot {
177 pub timestamp: Instant,
178 pub response_time: Duration,
179 pub throughput: f64,
180 pub error_rate: f64,
181 pub cost_per_request: f64,
182 pub node_utilization: HashMap<String, f64>,
183 }
184
185 #[derive(Debug, Clone, Serialize, Deserialize)]
186 pub struct NodePool {
187 pub nodes: HashMap<String, LoadBalancerNode>,
188 pub node_tiers: HashMap<String, NodeTier>,
189 pub capacity_management: CapacityManagement,
190 }
191
192 #[derive(Debug, Clone, Serialize, Deserialize)]
193 pub struct LoadBalancerNode {
194 pub node_id: String,
195 pub node_tier: String,
196 pub capacity: NodeCapacity,
197 pub pricing: NodePricing,
198 pub performance_profile: PerformanceProfile,
199 pub availability: NodeAvailability,
200 pub health_status: HealthStatus,
201 pub economic_score: f64,
202 }
203
204 #[derive(Debug, Clone, Serialize, Deserialize)]
205 pub struct NodeCapacity {
206 pub max_requests_per_second: f64,
207 pub max_concurrent_connections: u32,
208 pub storage_capacity_gb: u64,
209 pub bandwidth_mbps: f64,
210 pub cpu_cores: u32,
211 pub memory_gb: u32,
212 }
213
214 #[derive(Debug, Clone, Serialize, Deserialize)]
215 pub struct NodePricing {
216 pub pricing_model: PricingModel,
217 pub cost_per_request: f64,
218 pub cost_per_gb_storage: f64,
219 pub cost_per_gb_bandwidth: f64,
220 pub cost_per_hour: f64,
221 pub bulk_discounts: Vec<BulkDiscount>,
222 }
223
224 #[derive(Debug, Clone, Serialize, Deserialize)]
225 pub enum PricingModel {
226 PayPerUse,
227 Subscription,
228 Reserved,
229 Spot,
230 Hybrid,
231 }
232
233 #[derive(Debug, Clone, Serialize, Deserialize)]
234 pub struct BulkDiscount {
235 pub threshold: f64,
236 pub discount_percentage: f64,
237 pub applies_to: Vec<String>,
238 }
239
240 #[derive(Debug, Clone, Serialize, Deserialize)]
241 pub struct PerformanceProfile {
242 pub average_response_time: Duration,
243 pub throughput_capacity: f64,
244 pub reliability_score: f64,
245 pub latency_percentiles: LatencyPercentiles,
246 pub resource_efficiency: ResourceEfficiency,
247 }
248
249 #[derive(Debug, Clone, Serialize, Deserialize)]
250 pub struct LatencyPercentiles {
251 pub p50: Duration,
252 pub p90: Duration,
253 pub p95: Duration,
254 pub p99: Duration,
255 }
256
257 #[derive(Debug, Clone, Serialize, Deserialize)]
258 pub struct ResourceEfficiency {
259 pub cpu_efficiency: f64,
260 pub memory_efficiency: f64,
261 pub storage_efficiency: f64,
262 pub network_efficiency: f64,
263 }
264
265 #[derive(Debug, Clone, Serialize, Deserialize)]
266 pub struct NodeAvailability {
267 pub current_availability: f64,
268 pub scheduled_maintenance: Vec<MaintenanceWindow>,
269 pub availability_history: Vec<AvailabilityRecord>,
270 pub uptime_sla: f64,
271 }
272
273 #[derive(Debug, Clone, Serialize, Deserialize)]
274 pub struct MaintenanceWindow {
275 pub start_time: Instant,
276 pub end_time: Instant,
277 pub maintenance_type: MaintenanceType,
278 pub impact_level: ImpactLevel,
279 }
280
281 #[derive(Debug, Clone, Serialize, Deserialize)]
282 pub enum MaintenanceType {
283 Routine,
284 Security,
285 Hardware,
286 Software,
287 Emergency,
288 }
289
290 #[derive(Debug, Clone, Serialize, Deserialize)]
291 pub enum ImpactLevel {
292 None,
293 Low,
294 Medium,
295 High,
296 Complete,
297 }
298
299 #[derive(Debug, Clone, Serialize, Deserialize)]
300 pub struct AvailabilityRecord {
301 pub timestamp: Instant,
302 pub availability_percentage: f64,
303 pub downtime_duration: Duration,
304 pub downtime_reason: String,
305 }
306
307 #[derive(Debug, Clone, Serialize, Deserialize)]
308 pub enum HealthStatus {
309 Healthy,
310 Warning,
311 Critical,
312 Maintenance,
313 Offline,
314 }
315
316 #[derive(Debug, Clone, Serialize, Deserialize)]
317 pub struct NodeTier {
318 pub tier_name: String,
319 pub tier_level: u8,
320 pub performance_guarantees: Vec<PerformanceGuarantee>,
321 pub cost_characteristics: CostCharacteristics,
322 pub resource_limits: ResourceLimits,
323 }
324
325 #[derive(Debug, Clone, Serialize, Deserialize)]
326 pub struct PerformanceGuarantee {
327 pub metric_name: String,
328 pub guaranteed_value: f64,
329 pub measurement_period: Duration,
330 pub penalty_if_violated: f64,
331 }
332
333 #[derive(Debug, Clone, Serialize, Deserialize)]
334 pub struct CostCharacteristics {
335 pub cost_predictability: f64, // 0.0 = unpredictable, 1.0 = very predictable
336 pub cost_stability: f64, // Price volatility measure
337 pub bulk_pricing_available: bool,
338 pub commitment_discounts: Vec<CommitmentDiscount>,
339 }
340
341 #[derive(Debug, Clone, Serialize, Deserialize)]
342 pub struct CommitmentDiscount {
343 pub commitment_duration: Duration,
344 pub discount_percentage: f64,
345 pub minimum_usage: f64,
346 }
347
348 #[derive(Debug, Clone, Serialize, Deserialize)]
349 pub struct ResourceLimits {
350 pub max_cpu_utilization: f64,
351 pub max_memory_utilization: f64,
352 pub max_storage_utilization: f64,
353 pub max_network_utilization: f64,
354 pub burst_limits: BurstLimits,
355 }
356
357 #[derive(Debug, Clone, Serialize, Deserialize)]
358 pub struct BurstLimits {
359 pub cpu_burst_multiplier: f64,
360 pub memory_burst_multiplier: f64,
361 pub network_burst_multiplier: f64,
362 pub burst_duration: Duration,
363 }
364
365 #[derive(Debug, Clone, Serialize, Deserialize)]
366 pub struct CapacityManagement {
367 pub auto_scaling: AutoScalingConfig,
368 pub capacity_planning: CapacityPlanning,
369 pub resource_allocation: ResourceAllocation,
370 }
371
372 #[derive(Debug, Clone, Serialize, Deserialize)]
373 pub struct AutoScalingConfig {
374 pub enabled: bool,
375 pub scaling_policies: Vec<ScalingPolicy>,
376 pub cooldown_periods: CooldownPeriods,
377 pub scaling_limits: ScalingLimits,
378 }
379
380 #[derive(Debug, Clone, Serialize, Deserialize)]
381 pub struct ScalingPolicy {
382 pub policy_name: String,
383 pub trigger_metric: String,
384 pub scale_up_threshold: f64,
385 pub scale_down_threshold: f64,
386 pub scaling_action: ScalingAction,
387 pub economic_constraints: EconomicConstraints,
388 }
389
390 #[derive(Debug, Clone, Serialize, Deserialize)]
391 pub enum ScalingAction {
392 AddNodes { count: u32 },
393 RemoveNodes { count: u32 },
394 ChangeNodeTier { target_tier: String },
395 AdjustCapacity { percentage: f64 },
396 }
397
398 #[derive(Debug, Clone, Serialize, Deserialize)]
399 pub struct EconomicConstraints {
400 pub max_cost_increase: f64,
401 pub roi_threshold: f64,
402 pub payback_period: Duration,
403 pub budget_limit: f64,
404 }
405
406 #[derive(Debug, Clone, Serialize, Deserialize)]
407 pub struct CooldownPeriods {
408 pub scale_up_cooldown: Duration,
409 pub scale_down_cooldown: Duration,
410 pub policy_change_cooldown: Duration,
411 }
412
413 #[derive(Debug, Clone, Serialize, Deserialize)]
414 pub struct ScalingLimits {
415 pub min_nodes: u32,
416 pub max_nodes: u32,
417 pub max_scaling_rate: f64, // nodes per minute
418 pub max_cost_per_hour: f64,
419 }
420
421 #[derive(Debug, Clone, Serialize, Deserialize)]
422 pub struct CapacityPlanning {
423 pub planning_horizon: Duration,
424 pub demand_forecasts: Vec<DemandForecast>,
425 pub capacity_recommendations: Vec<CapacityRecommendation>,
426 pub cost_projections: Vec<CostProjection>,
427 }
428
429 #[derive(Debug, Clone, Serialize, Deserialize)]
430 pub struct DemandForecast {
431 pub forecast_period: Duration,
432 pub predicted_demand: f64,
433 pub confidence_interval: (f64, f64),
434 pub seasonal_factors: Vec<SeasonalFactor>,
435 }
436
437 #[derive(Debug, Clone, Serialize, Deserialize)]
438 pub struct SeasonalFactor {
439 pub factor_name: String,
440 pub multiplier: f64,
441 pub time_period: Duration,
442 pub recurrence_pattern: String,
443 }
444
445 #[derive(Debug, Clone, Serialize, Deserialize)]
446 pub struct CapacityRecommendation {
447 pub recommendation_id: String,
448 pub recommended_action: RecommendedAction,
449 pub justification: String,
450 pub expected_benefit: f64,
451 pub implementation_cost: f64,
452 pub risk_assessment: RiskAssessment,
453 }
454
455 #[derive(Debug, Clone, Serialize, Deserialize)]
456 pub enum RecommendedAction {
457 IncreaseCapacity { amount: f64 },
458 DecreaseCapacity { amount: f64 },
459 ChangeConfiguration { new_config: String },
460 MigrateWorkloads { target_nodes: Vec<String> },
461 OptimizePlacement,
462 }
463
464 #[derive(Debug, Clone, Serialize, Deserialize)]
465 pub struct RiskAssessment {
466 pub risk_level: RiskLevel,
467 pub risk_factors: Vec<RiskFactor>,
468 pub mitigation_strategies: Vec<String>,
469 pub contingency_plans: Vec<String>,
470 }
471
472 #[derive(Debug, Clone, Serialize, Deserialize)]
473 pub enum RiskLevel {
474 Low,
475 Medium,
476 High,
477 Critical,
478 }
479
480 #[derive(Debug, Clone, Serialize, Deserialize)]
481 pub struct RiskFactor {
482 pub factor_name: String,
483 pub probability: f64,
484 pub impact: f64,
485 pub description: String,
486 }
487
488 #[derive(Debug, Clone, Serialize, Deserialize)]
489 pub struct CostProjection {
490 pub projection_period: Duration,
491 pub projected_cost: f64,
492 pub cost_breakdown: HashMap<String, f64>,
493 pub cost_drivers: Vec<String>,
494 pub optimization_opportunities: Vec<String>,
495 }
496
497 #[derive(Debug, Clone, Serialize, Deserialize)]
498 pub struct ResourceAllocation {
499 pub allocation_strategy: AllocationStrategy,
500 pub resource_reservations: Vec<ResourceReservation>,
501 pub allocation_efficiency: f64,
502 pub utilization_targets: HashMap<String, f64>,
503 }
504
505 #[derive(Debug, Clone, Serialize, Deserialize)]
506 pub enum AllocationStrategy {
507 FirstFit,
508 BestFit,
509 WorstFit,
510 CostOptimized,
511 PerformanceOptimized,
512 Balanced,
513 }
514
515 #[derive(Debug, Clone, Serialize, Deserialize)]
516 pub struct ResourceReservation {
517 pub reservation_id: String,
518 pub reserved_resources: HashMap<String, f64>,
519 pub reservation_duration: Duration,
520 pub cost_per_hour: f64,
521 pub utilization_commitment: f64,
522 }
523
524 #[derive(Debug, Clone, Serialize, Deserialize)]
525 pub struct RoutingPolicy {
526 pub policy_name: String,
527 pub routing_rules: Vec<RoutingRule>,
528 pub traffic_shaping: TrafficShaping,
529 pub cost_controls: CostControls,
530 }
531
532 #[derive(Debug, Clone, Serialize, Deserialize)]
533 pub struct RoutingRule {
534 pub rule_priority: u8,
535 pub conditions: Vec<RoutingCondition>,
536 pub actions: Vec<RoutingAction>,
537 pub cost_impact: f64,
538 }
539
540 #[derive(Debug, Clone, Serialize, Deserialize)]
541 pub struct RoutingCondition {
542 pub condition_type: ConditionType,
543 pub condition_value: String,
544 pub operator: ComparisonOperator,
545 }
546
547 #[derive(Debug, Clone, Serialize, Deserialize)]
548 pub enum ConditionType {
549 RequestSize,
550 ClientLocation,
551 TimeOfDay,
552 LoadLevel,
553 CostBudget,
554 NodeTier,
555 ServiceType,
556 }
557
558 #[derive(Debug, Clone, Serialize, Deserialize)]
559 pub enum ComparisonOperator {
560 Equals,
561 NotEquals,
562 GreaterThan,
563 LessThan,
564 Contains,
565 InRange,
566 }
567
568 #[derive(Debug, Clone, Serialize, Deserialize)]
569 pub struct RoutingAction {
570 pub action_type: ActionType,
571 pub target_nodes: Vec<String>,
572 pub weight_distribution: HashMap<String, f64>,
573 pub failover_targets: Vec<String>,
574 }
575
576 #[derive(Debug, Clone, Serialize, Deserialize)]
577 pub enum ActionType {
578 RouteToTier,
579 RouteToSpecificNode,
580 RouteByPerformance,
581 RouteByCost,
582 LoadBalance,
583 Reject,
584 }
585
586 #[derive(Debug, Clone, Serialize, Deserialize)]
587 pub struct TrafficShaping {
588 pub rate_limiting: RateLimiting,
589 pub priority_queues: Vec<PriorityQueue>,
590 pub bandwidth_allocation: BandwidthAllocation,
591 }
592
593 #[derive(Debug, Clone, Serialize, Deserialize)]
594 pub struct RateLimiting {
595 pub requests_per_second: f64,
596 pub burst_size: u32,
597 pub cost_per_excess_request: f64,
598 pub throttling_strategy: ThrottlingStrategy,
599 }
600
601 #[derive(Debug, Clone, Serialize, Deserialize)]
602 pub enum ThrottlingStrategy {
603 DropExcess,
604 QueueWithDelay,
605 RedirectToLowerTier,
606 DynamicPricing,
607 }
608
609 #[derive(Debug, Clone, Serialize, Deserialize)]
610 pub struct PriorityQueue {
611 pub queue_name: String,
612 pub priority_level: u8,
613 pub bandwidth_share: f64,
614 pub cost_multiplier: f64,
615 }
616
617 #[derive(Debug, Clone, Serialize, Deserialize)]
618 pub struct BandwidthAllocation {
619 pub total_bandwidth: f64,
620 pub guaranteed_bandwidth: HashMap<String, f64>,
621 pub burstable_bandwidth: HashMap<String, f64>,
622 pub cost_per_mbps: f64,
623 }
624
625 #[derive(Debug, Clone, Serialize, Deserialize)]
626 pub struct CostControls {
627 pub cost_limits: CostLimits,
628 pub cost_monitoring: CostMonitoring,
629 pub cost_optimization: CostOptimizationSettings,
630 }
631
632 #[derive(Debug, Clone, Serialize, Deserialize)]
633 pub struct CostLimits {
634 pub daily_limit: f64,
635 pub monthly_limit: f64,
636 pub per_request_limit: f64,
637 pub overage_handling: OverageHandling,
638 }
639
640 #[derive(Debug, Clone, Serialize, Deserialize)]
641 pub enum OverageHandling {
642 Block,
643 Alert,
644 Throttle,
645 UpgradeTier,
646 }
647
648 #[derive(Debug, Clone, Serialize, Deserialize)]
649 pub struct CostMonitoring {
650 pub monitoring_frequency: Duration,
651 pub cost_alerts: Vec<CostAlert>,
652 pub cost_reporting: CostReporting,
653 }
654
655 #[derive(Debug, Clone, Serialize, Deserialize)]
656 pub struct CostAlert {
657 pub alert_name: String,
658 pub threshold_percentage: f64,
659 pub notification_channels: Vec<String>,
660 pub escalation_policy: String,
661 }
662
663 #[derive(Debug, Clone, Serialize, Deserialize)]
664 pub struct CostReporting {
665 pub report_frequency: Duration,
666 pub report_recipients: Vec<String>,
667 pub cost_breakdown_detail: DetailLevel,
668 }
669
670 #[derive(Debug, Clone, Serialize, Deserialize)]
671 pub enum DetailLevel {
672 Summary,
673 Detailed,
674 Granular,
675 }
676
677 #[derive(Debug, Clone, Serialize, Deserialize)]
678 pub struct CostOptimizationSettings {
679 pub auto_optimization: bool,
680 pub optimization_frequency: Duration,
681 pub optimization_targets: Vec<OptimizationTarget>,
682 pub optimization_constraints: Vec<OptimizationConstraint>,
683 }
684
685 #[derive(Debug, Clone, Serialize, Deserialize)]
686 pub struct OptimizationTarget {
687 pub target_name: String,
688 pub target_metric: String,
689 pub target_value: f64,
690 pub weight: f64,
691 }
692
693 #[derive(Debug, Clone, Serialize, Deserialize)]
694 pub struct OptimizationConstraint {
695 pub constraint_name: String,
696 pub constraint_expression: String,
697 pub constraint_type: ConstraintType,
698 }
699
700 #[derive(Debug, Clone, Serialize, Deserialize)]
701 pub struct EconomicMetrics {
702 pub cost_efficiency: f64,
703 pub revenue_per_request: f64,
704 pub profit_margin: f64,
705 pub cost_per_performance_unit: f64,
706 pub return_on_investment: f64,
707 pub economic_value_added: f64,
708 }
709
710 #[derive(Debug, Clone, Serialize, Deserialize)]
711 pub struct ResourceWeight {
712 pub node_id: String,
713 pub performance_weight: f64,
714 pub cost_weight: f64,
715 pub reliability_weight: f64,
716 pub composite_score: f64,
717 }
718
719 #[derive(Debug, Clone, Serialize, Deserialize)]
720 pub struct CostOptimizedRouting {
721 pub routing_algorithm: RoutingAlgorithm,
722 pub cost_matrix: HashMap<String, HashMap<String, f64>>,
723 pub performance_requirements: PerformanceRequirements,
724 pub optimization_results: OptimizationResults,
725 }
726
727 #[derive(Debug, Clone, Serialize, Deserialize)]
728 pub enum RoutingAlgorithm {
729 Dijkstra,
730 AStar,
731 FloydWarshall,
732 BellmanFord,
733 Custom(String),
734 }
735
736 #[derive(Debug, Clone, Serialize, Deserialize)]
737 pub struct PerformanceRequirements {
738 pub max_latency: Duration,
739 pub min_throughput: f64,
740 pub max_error_rate: f64,
741 pub availability_requirement: f64,
742 }
743
744 #[derive(Debug, Clone, Serialize, Deserialize)]
745 pub struct OptimizationResults {
746 pub optimal_routes: Vec<OptimalRoute>,
747 pub total_cost: f64,
748 pub cost_savings: f64,
749 pub performance_impact: f64,
750 }
751
752 #[derive(Debug, Clone, Serialize, Deserialize)]
753 pub struct OptimalRoute {
754 pub source: String,
755 pub destination: String,
756 pub path: Vec<String>,
757 pub total_cost: f64,
758 pub expected_performance: PerformanceMetrics,
759 }
760
761 #[derive(Debug, Clone, Serialize, Deserialize)]
762 pub struct PerformanceMetrics {
763 pub latency: Duration,
764 pub throughput: f64,
765 pub reliability: f64,
766 pub cost_efficiency: f64,
767 }
768
769 #[derive(Debug, Clone, Serialize, Deserialize)]
770 pub struct PerformancePricing {
771 pub pricing_tiers: Vec<PerformanceTier>,
772 pub dynamic_pricing: DynamicPricing,
773 pub performance_guarantees: Vec<PerformanceGuarantee>,
774 pub penalty_structure: PenaltyStructure,
775 }
776
777 #[derive(Debug, Clone, Serialize, Deserialize)]
778 pub struct PerformanceTier {
779 pub tier_name: String,
780 pub performance_level: f64,
781 pub base_price: f64,
782 pub performance_multiplier: f64,
783 pub included_features: Vec<String>,
784 }
785
786 #[derive(Debug, Clone, Serialize, Deserialize)]
787 pub struct DynamicPricing {
788 pub enabled: bool,
789 pub pricing_factors: Vec<PricingFactor>,
790 pub adjustment_frequency: Duration,
791 pub price_bounds: PriceBounds,
792 }
793
794 #[derive(Debug, Clone, Serialize, Deserialize)]
795 pub struct PricingFactor {
796 pub factor_name: String,
797 pub current_value: f64,
798 pub weight: f64,
799 pub impact_on_price: f64,
800 }
801
802 #[derive(Debug, Clone, Serialize, Deserialize)]
803 pub struct PriceBounds {
804 pub minimum_price: f64,
805 pub maximum_price: f64,
806 pub maximum_change_per_period: f64,
807 }
808
809 #[derive(Debug, Clone, Serialize, Deserialize)]
810 pub struct PenaltyStructure {
811 pub sla_violations: Vec<SLAViolationPenalty>,
812 pub performance_penalties: Vec<PerformancePenalty>,
813 pub availability_penalties: Vec<AvailabilityPenalty>,
814 }
815
816 #[derive(Debug, Clone, Serialize, Deserialize)]
817 pub struct SLAViolationPenalty {
818 pub violation_type: String,
819 pub penalty_amount: f64,
820 pub penalty_calculation: PenaltyCalculation,
821 }
822
823 #[derive(Debug, Clone, Serialize, Deserialize)]
824 pub struct PerformancePenalty {
825 pub metric_name: String,
826 pub threshold: f64,
827 pub penalty_per_unit: f64,
828 pub maximum_penalty: f64,
829 }
830
831 #[derive(Debug, Clone, Serialize, Deserialize)]
832 pub struct AvailabilityPenalty {
833 pub availability_threshold: f64,
834 pub penalty_percentage: f64,
835 pub grace_period: Duration,
836 }
837
838 #[derive(Debug, Clone, Serialize, Deserialize)]
839 pub struct PenaltyCalculation {
840 pub calculation_method: CalculationMethod,
841 pub base_amount: f64,
842 pub escalation_factor: f64,
843 }
844
845 #[derive(Debug, Clone, Serialize, Deserialize)]
846 pub enum CalculationMethod {
847 Fixed,
848 Proportional,
849 Progressive,
850 Exponential,
851 }
852
853 impl EconomicLoadBalancer {
854 pub fn new(balancer_id: String, strategy: LoadBalancingStrategy) -> Self {
855 Self {
856 balancer_id,
857 strategy,
858 cost_optimizer: CostOptimizer::new(),
859 performance_tracker: PerformanceTracker::new(),
860 node_pool: NodePool::new(),
861 routing_policies: Vec::new(),
862 economic_metrics: EconomicMetrics::default(),
863 }
864 }
865
866 pub async fn route_request(&self, request: &Request) -> Result<String, Box<dyn std::error::Error>> {
867 let candidate_nodes = self.get_candidate_nodes(request).await?;
868 let optimal_node = self.select_optimal_node(&candidate_nodes, request).await?;
869
870 Ok(optimal_node)
871 }
872
873 pub async fn optimize_routing(&mut self) -> Result<(), Box<dyn std::error::Error>> {
874 let optimization_result = self.cost_optimizer.optimize_placement(&self.node_pool).await?;
875 self.apply_optimization_results(optimization_result).await?;
876
877 Ok(())
878 }
879
880 async fn get_candidate_nodes(&self, request: &Request) -> Result<Vec<String>, Box<dyn std::error::Error>> {
881 let mut candidates = Vec::new();
882
883 for (node_id, node) in &self.node_pool.nodes {
884 if self.meets_requirements(node, request) {
885 candidates.push(node_id.clone());
886 }
887 }
888
889 Ok(candidates)
890 }
891
892 async fn select_optimal_node(&self, candidates: &[String], request: &Request) -> Result<String, Box<dyn std::error::Error>> {
893 let mut best_node = None;
894 let mut best_score = f64::NEG_INFINITY;
895
896 for node_id in candidates {
897 if let Some(node) = self.node_pool.nodes.get(node_id) {
898 let score = self.calculate_node_score(node, request).await?;
899 if score > best_score {
900 best_score = score;
901 best_node = Some(node_id.clone());
902 }
903 }
904 }
905
906 best_node.ok_or_else(|| "No suitable node found".into())
907 }
908
909 async fn calculate_node_score(&self, node: &LoadBalancerNode, request: &Request) -> Result<f64, Box<dyn std::error::Error>> {
910 let cost_score = self.calculate_cost_score(node, request);
911 let performance_score = self.calculate_performance_score(node, request);
912 let availability_score = node.availability.current_availability;
913
914 let composite_score = match self.strategy {
915 LoadBalancingStrategy::CostOptimized => cost_score * 0.7 + performance_score * 0.2 + availability_score * 0.1,
916 LoadBalancingStrategy::PerformanceFirst => performance_score * 0.7 + availability_score * 0.2 + cost_score * 0.1,
917 LoadBalancingStrategy::Balanced => cost_score * 0.4 + performance_score * 0.4 + availability_score * 0.2,
918 LoadBalancingStrategy::LatencyOptimized => {
919 let latency_score = 1.0 / (node.performance_profile.average_response_time.as_millis() as f64 + 1.0);
920 latency_score * 0.6 + performance_score * 0.3 + cost_score * 0.1
921 },
922 _ => cost_score * 0.33 + performance_score * 0.33 + availability_score * 0.33,
923 };
924
925 Ok(composite_score)
926 }
927
928 fn calculate_cost_score(&self, node: &LoadBalancerNode, _request: &Request) -> f64 {
929 // Higher cost = lower score
930 let max_cost = 1.0; // Normalize to maximum expected cost
931 let normalized_cost = node.pricing.cost_per_request / max_cost;
932 1.0 - normalized_cost.min(1.0)
933 }
934
935 fn calculate_performance_score(&self, node: &LoadBalancerNode, _request: &Request) -> f64 {
936 node.performance_profile.reliability_score
937 }
938
939 fn meets_requirements(&self, node: &LoadBalancerNode, request: &Request) -> bool {
940 matches!(node.health_status, HealthStatus::Healthy) &&
941 node.capacity.max_requests_per_second >= request.expected_load
942 }
943
944 async fn apply_optimization_results(&mut self, _results: OptimizationResults) -> Result<(), Box<dyn std::error::Error>> {
945 // Apply the optimization results to routing policies
946 Ok(())
947 }
948 }
949
950 // Helper structures
951 #[derive(Debug, Clone)]
952 pub struct Request {
953 pub request_id: String,
954 pub expected_load: f64,
955 pub latency_requirement: Duration,
956 pub cost_sensitivity: f64,
957 }
958
959 impl CostOptimizer {
960 fn new() -> Self {
961 Self {
962 optimization_algorithm: OptimizationAlgorithm::GreedyOptimization,
963 cost_models: HashMap::new(),
964 budget_constraints: BudgetConstraints::default(),
965 cost_thresholds: CostThresholds::default(),
966 }
967 }
968
969 async fn optimize_placement(&self, _node_pool: &NodePool) -> Result<OptimizationResults, Box<dyn std::error::Error>> {
970 // Placeholder implementation
971 Ok(OptimizationResults {
972 optimal_routes: Vec::new(),
973 total_cost: 0.0,
974 cost_savings: 0.0,
975 performance_impact: 0.0,
976 })
977 }
978 }
979
980 impl PerformanceTracker {
981 fn new() -> Self {
982 Self {
983 metrics: HashMap::new(),
984 sla_targets: HashMap::new(),
985 performance_history: Vec::new(),
986 }
987 }
988 }
989
990 impl NodePool {
991 fn new() -> Self {
992 Self {
993 nodes: HashMap::new(),
994 node_tiers: HashMap::new(),
995 capacity_management: CapacityManagement::default(),
996 }
997 }
998 }
999
1000 // Default implementations
1001 impl Default for BudgetConstraints {
1002 fn default() -> Self {
1003 Self {
1004 total_budget: 10000.0,
1005 budget_periods: Vec::new(),
1006 cost_allocation: HashMap::new(),
1007 overage_policy: OveragePolicy::Alert,
1008 }
1009 }
1010 }
1011
1012 impl Default for CostThresholds {
1013 fn default() -> Self {
1014 Self {
1015 warning_threshold: 0.8,
1016 critical_threshold: 0.95,
1017 optimization_trigger: 0.2,
1018 emergency_threshold: 1.1,
1019 }
1020 }
1021 }
1022
1023 impl Default for CapacityManagement {
1024 fn default() -> Self {
1025 Self {
1026 auto_scaling: AutoScalingConfig {
1027 enabled: true,
1028 scaling_policies: Vec::new(),
1029 cooldown_periods: CooldownPeriods {
1030 scale_up_cooldown: Duration::from_secs(300),
1031 scale_down_cooldown: Duration::from_secs(600),
1032 policy_change_cooldown: Duration::from_secs(900),
1033 },
1034 scaling_limits: ScalingLimits {
1035 min_nodes: 1,
1036 max_nodes: 100,
1037 max_scaling_rate: 5.0,
1038 max_cost_per_hour: 1000.0,
1039 },
1040 },
1041 capacity_planning: CapacityPlanning {
1042 planning_horizon: Duration::from_secs(30 * 24 * 3600), // 30 days
1043 demand_forecasts: Vec::new(),
1044 capacity_recommendations: Vec::new(),
1045 cost_projections: Vec::new(),
1046 },
1047 resource_allocation: ResourceAllocation {
1048 allocation_strategy: AllocationStrategy::Balanced,
1049 resource_reservations: Vec::new(),
1050 allocation_efficiency: 0.85,
1051 utilization_targets: HashMap::new(),
1052 },
1053 }
1054 }
1055 }
1056
1057 impl Default for EconomicMetrics {
1058 fn default() -> Self {
1059 Self {
1060 cost_efficiency: 0.0,
1061 revenue_per_request: 0.0,
1062 profit_margin: 0.0,
1063 cost_per_performance_unit: 0.0,
1064 return_on_investment: 0.0,
1065 economic_value_added: 0.0,
1066 }
1067 }
1068 }