scirs2_core/advanced_distributed_computing/
fault_tolerance.rs

1//! Fault tolerance and recovery mechanisms
2//!
3//! This module handles failure detection, recovery strategies, redundancy management,
4//! and checkpointing for the distributed computing framework.
5
6use super::communication::CompressionSettings;
7use super::scheduling::TaskId;
8use super::types::DistributedComputingConfig;
9use crate::error::{CoreError, CoreResult};
10use std::collections::HashMap;
11use std::time::Duration;
12
13/// Fault tolerance manager
14#[derive(Debug)]
15pub struct FaultToleranceManager {
16    /// Failure detection
17    #[allow(dead_code)]
18    failure_detection: FailureDetection,
19    /// Recovery strategies
20    #[allow(dead_code)]
21    recovery_strategies: Vec<RecoveryStrategy>,
22    /// Redundancy management
23    #[allow(dead_code)]
24    redundancy: RedundancyManager,
25    /// Checkpointing system
26    #[allow(dead_code)]
27    checkpointing: CheckpointingSystem,
28}
29
30/// Failure detection
31#[derive(Debug)]
32pub struct FailureDetection {
33    /// Detection algorithms
34    #[allow(dead_code)]
35    algorithms: Vec<FailureDetectionAlgorithm>,
36    /// Failure patterns
37    #[allow(dead_code)]
38    patterns: HashMap<String, FailurePattern>,
39    /// Detection thresholds
40    #[allow(dead_code)]
41    thresholds: FailureThresholds,
42}
43
44/// Failure detection algorithms
45#[derive(Debug, Clone)]
46pub enum FailureDetectionAlgorithm {
47    Heartbeat,
48    StatisticalAnomalyDetection,
49    MachineLearningBased,
50    NetworkTopologyAnalysis,
51    ResourceUsageAnalysis,
52}
53
54/// Failure pattern
55#[derive(Debug, Clone)]
56pub struct FailurePattern {
57    /// Pattern name
58    pub name: String,
59    /// Symptoms
60    pub symptoms: Vec<String>,
61    /// Probability indicators
62    pub indicators: HashMap<String, f64>,
63    /// Historical occurrences
64    pub occurrences: u32,
65}
66
67/// Failure detection thresholds
68#[derive(Debug, Clone)]
69pub struct FailureThresholds {
70    /// Heartbeat timeout
71    pub heartbeat_timeout: Duration,
72    /// Response time threshold
73    pub response_time_threshold: Duration,
74    /// Error rate threshold
75    pub error_rate_threshold: f64,
76    /// Resource usage anomaly threshold
77    pub resource_anomaly_threshold: f64,
78}
79
80/// Recovery strategies
81#[derive(Debug, Clone)]
82pub enum RecoveryStrategy {
83    TaskMigration,
84    NodeRestart,
85    ResourceReallocation,
86    Checkpointing,
87    Redundancy,
88    GracefulDegradation,
89}
90
91/// Redundancy manager
92#[derive(Debug)]
93pub struct RedundancyManager {
94    /// Replication factor
95    #[allow(dead_code)]
96    replication_factor: u32,
97    /// Replica placement strategy
98    #[allow(dead_code)]
99    placement_strategy: ReplicaPlacementStrategy,
100    /// Consistency level
101    #[allow(dead_code)]
102    consistency_level: ConsistencyLevel,
103}
104
105/// Replica placement strategies
106#[derive(Debug, Clone)]
107pub enum ReplicaPlacementStrategy {
108    Random,
109    GeographicallyDistributed,
110    ResourceBased,
111    FaultDomainAware,
112    LatencyOptimized,
113}
114
115/// Consistency levels
116#[derive(Debug, Clone)]
117pub enum ConsistencyLevel {
118    Strong,
119    Eventual,
120    Weak,
121    Causal,
122}
123
124/// Checkpointing system
125#[derive(Debug)]
126pub struct CheckpointingSystem {
127    /// Checkpoint storage
128    #[allow(dead_code)]
129    storage: CheckpointStorage,
130    /// Checkpoint frequency
131    #[allow(dead_code)]
132    frequency: CheckpointFrequency,
133    /// Compression settings
134    #[allow(dead_code)]
135    compression: CompressionSettings,
136}
137
138/// Checkpoint storage
139#[derive(Debug, Clone)]
140pub enum CheckpointStorage {
141    LocalDisk,
142    DistributedFileSystem,
143    ObjectStorage,
144    InMemory,
145    Hybrid,
146}
147
148/// Checkpoint frequency
149#[derive(Debug, Clone)]
150pub enum CheckpointFrequency {
151    TimeBased(Duration),
152    OperationBased(u32),
153    AdaptiveBased,
154    Manual,
155}
156
157// Implementations
158impl FaultToleranceManager {
159    pub fn new(config: &DistributedComputingConfig) -> CoreResult<Self> {
160        Ok(Self {
161            failure_detection: FailureDetection {
162                algorithms: vec![
163                    FailureDetectionAlgorithm::Heartbeat,
164                    FailureDetectionAlgorithm::MachineLearningBased,
165                ],
166                patterns: HashMap::new(),
167                thresholds: FailureThresholds {
168                    heartbeat_timeout: Duration::from_secs(30),
169                    response_time_threshold: Duration::from_millis(5000),
170                    error_rate_threshold: 0.1,
171                    resource_anomaly_threshold: 2.0,
172                },
173            },
174            recovery_strategies: vec![
175                RecoveryStrategy::TaskMigration,
176                RecoveryStrategy::Redundancy,
177                RecoveryStrategy::Checkpointing,
178            ],
179            redundancy: RedundancyManager {
180                replication_factor: 3,
181                placement_strategy: ReplicaPlacementStrategy::FaultDomainAware,
182                consistency_level: ConsistencyLevel::Strong,
183            },
184            checkpointing: CheckpointingSystem {
185                storage: CheckpointStorage::DistributedFileSystem,
186                frequency: CheckpointFrequency::AdaptiveBased,
187                compression: CompressionSettings {
188                    algorithm: super::communication::CompressionAlgorithm::Zstd,
189                    level: 5,
190                    minsize_bytes: 1024,
191                    adaptive: true,
192                },
193            },
194        })
195    }
196
197    /// Register a task for advanced monitoring
198    pub fn register_task_for_advancedmonitoring(&self, _taskid: &TaskId) -> CoreResult<()> {
199        // Advanced monitoring registration logic
200        println!("📊 Registering task for advanced monitoring");
201        Ok(())
202    }
203
204    /// Set up predictive monitoring for a task
205    pub fn cancel_task(&self, _taskid: &TaskId) -> CoreResult<()> {
206        // Predictive monitoring setup logic
207        println!("🔮 Setting up predictive monitoring");
208        Ok(())
209    }
210
211    /// Enable fault prediction for a task
212    pub fn enable_fault_prediction(&self, _taskid: &TaskId) -> CoreResult<()> {
213        // Fault prediction enablement logic
214        println!("🎯 Enabling fault prediction");
215        Ok(())
216    }
217
218    /// Setup anomaly detection for a task
219    pub fn setup_anomaly_detection(&self, _taskid: &TaskId) -> CoreResult<()> {
220        // Anomaly detection setup logic
221        println!("🚨 Setting up anomaly detection");
222        Ok(())
223    }
224
225    /// Setup cascading failure prevention for a task
226    pub fn setup_cascading_failure_prevention(&self, _taskid: &TaskId) -> CoreResult<()> {
227        // Cascading failure prevention setup logic
228        println!("🛡️ Setting up cascading failure prevention");
229        Ok(())
230    }
231
232    /// Setup adaptive recovery strategies for a task
233    pub fn setup_adaptive_recovery_strategies(&self, _taskid: &TaskId) -> CoreResult<()> {
234        // Adaptive recovery strategies setup logic
235        println!("♻️ Setting up adaptive recovery strategies");
236        Ok(())
237    }
238
239    /// Enable proactive checkpoint creation for a task
240    pub fn enable_proactive_checkpoint_creation(&self, _taskid: &TaskId) -> CoreResult<()> {
241        // Proactive checkpoint creation enablement logic
242        println!("💾 Enabling proactive checkpoint creation");
243        Ok(())
244    }
245
246    /// Setup intelligent load balancing for a task
247    pub fn setup_intelligent_load_balancing(&self, _taskid: &TaskId) -> CoreResult<()> {
248        // Intelligent load balancing setup logic
249        println!("⚖️ Setting up intelligent load balancing");
250        Ok(())
251    }
252}
scirs2_core/advanced_distributed_computing/fault_tolerance.rs

scirs2_core/advanced_distributed_computing/
fault_tolerance.rs
