MCP File Context Server
by bsmi021
- docs
# Technical Design: MCP File Context Server Initial Read Optimization
## 1. System Requirements
### 1.1 Hardware Requirements
- CPU: Multi-core processor (recommended minimum 4 cores)
- Memory: Minimum 8GB RAM, recommended 16GB for large codebases
- Storage: SSD recommended for optimal I/O performance
### 1.2 Software Requirements
- Node.js 18.0 or higher
- TypeScript 4.5 or higher
- Operating System: Cross-platform (Windows, Linux, macOS)
### 1.3 Dependencies
```typescript
interface DependencyRequirements {
required: {
'lru-cache': '^7.0.0',
'chokidar': '^3.5.0',
'@modelcontextprotocol/sdk': '^1.0.0',
'mime-types': '^2.1.0'
},
optional: {
'worker-threads': '^1.0.0', // For parallel processing
'node-worker-threads-pool': '^1.5.0' // For worker pool management
}
}
```
## 2. Architecture Components
### 2.1 Memory Management System
```typescript
interface MemoryConfig {
maxCacheSize: number; // Maximum memory for cache in MB
workerMemoryLimit: number; // Memory limit per worker in MB
gcThreshold: number; // GC trigger threshold (0.8 = 80%)
emergencyFreeThreshold: number; // Emergency memory release threshold
}
class MemoryManager {
private memoryUsage: number;
private totalAllocated: number;
constructor(private config: MemoryConfig) {
this.setupMemoryMonitoring();
}
private setupMemoryMonitoring() {
if (globalThis.gc) {
// Register memory pressure handlers
this.setupMemoryPressureHandlers();
}
}
private shouldTriggerGC(): boolean {
const usage = process.memoryUsage();
return (usage.heapUsed / usage.heapTotal) > this.config.gcThreshold;
}
}
```
### 2.2 Worker Pool Management
```typescript
interface WorkerPoolConfig {
minWorkers: number;
maxWorkers: number;
idleTimeout: number; // ms before releasing idle worker
taskTimeout: number; // ms before task timeout
}
class WorkerPoolManager {
private workerPool: Map<string, Worker>;
private taskQueue: Queue<Task>;
private activeWorkers: number;
constructor(private config: WorkerPoolConfig) {
this.initializeWorkerPool();
}
private async initializeWorkerPool() {
const initialWorkers = Math.min(
this.config.minWorkers,
os.cpus().length
);
for (let i = 0; i < initialWorkers; i++) {
await this.addWorker();
}
}
}
```
### 2.3 Enhanced Cache Service Configuration
```typescript
interface CacheConfig {
maxSize: number;
parallelProcessing: {
enabled: boolean;
maxWorkers?: number;
chunkSize?: number;
};
preloadStrategy: {
enabled: boolean;
maxPreloadItems: number;
preloadDepth: number;
};
progressiveLoading: {
enabled: boolean;
priorityLevels: number;
};
memoryManagement: {
maxMemoryPercent: number;
gcThreshold: number;
emergencyThreshold: number;
};
storage: {
persistToDisk: boolean;
compressionLevel?: number;
storageLocation?: string;
};
}
```
## 3. Core Components
### 3.1 Parallel File Reader Service
```typescript
class ParallelFileReader {
private workerPool: WorkerPoolManager;
private memoryManager: MemoryManager;
constructor(config: FileReaderConfig) {
this.workerPool = new WorkerPoolManager({
minWorkers: 2,
maxWorkers: os.cpus().length,
idleTimeout: 60000,
taskTimeout: 30000
});
this.memoryManager = new MemoryManager({
maxCacheSize: config.maxCacheSize,
workerMemoryLimit: config.workerMemoryLimit,
gcThreshold: 0.8,
emergencyFreeThreshold: 0.95
});
}
async readFileChunked(filepath: string, options: ReadOptions): Promise<FileContent> {
const stats = await fs.stat(filepath);
const chunks: Buffer[] = [];
const chunkSize = this.calculateOptimalChunkSize(stats.size);
// Distribute chunks to worker pool
const chunkTasks = this.createChunkTasks(filepath, stats.size, chunkSize);
const results = await this.workerPool.executeBatch(chunkTasks);
return this.assembleResults(results, stats);
}
}
```
### 3.2 Messaging Architecture
```typescript
interface Message {
id: string;
type: MessageType;
payload: any;
metadata: {
timestamp: number;
priority: number;
timeout?: number;
};
}
class MessageBroker {
private subscriptions: Map<string, Set<MessageHandler>>;
private priorityQueue: PriorityQueue<Message>;
constructor() {
this.subscriptions = new Map();
this.priorityQueue = new PriorityQueue();
}
async publish(message: Message): Promise<void> {
const handlers = this.subscriptions.get(message.type);
if (handlers) {
await Promise.all(
Array.from(handlers).map(handler =>
handler(message.payload)
)
);
}
}
}
```
### 3.3 File Analysis Pipeline
```typescript
interface AnalysisPipeline {
stages: Array<{
name: string;
processor: (chunk: Buffer) => Promise<AnalysisResult>;
priority: number;
}>;
}
class FileAnalyzer {
private pipeline: AnalysisPipeline;
private messageBroker: MessageBroker;
constructor() {
this.pipeline = {
stages: [
{
name: 'header',
processor: this.analyzeFileHeader,
priority: 1
},
{
name: 'content',
processor: this.analyzeContent,
priority: 2
},
{
name: 'metadata',
processor: this.extractMetadata,
priority: 3
}
]
};
}
}
```
## 4. Performance Optimization Strategies
### 4.1 Memory Management Strategies
```typescript
class OptimizedMemoryStrategy {
private readonly BUFFER_POOL_SIZE = 8192;
private bufferPool: Buffer[];
constructor() {
this.bufferPool = Array(10).fill(null)
.map(() => Buffer.allocUnsafe(this.BUFFER_POOL_SIZE));
}
private acquireBuffer(): Buffer {
return this.bufferPool.pop() ||
Buffer.allocUnsafe(this.BUFFER_POOL_SIZE);
}
private releaseBuffer(buffer: Buffer) {
if (this.bufferPool.length < 10) {
this.bufferPool.push(buffer);
}
}
}
```
### 4.2 Worker Thread Management
```typescript
class WorkerThreadManager {
private workers: Worker[];
private taskQueue: PriorityQueue<Task>;
private activeWorkers: Set<Worker>;
constructor(private config: WorkerConfig) {
this.workers = [];
this.taskQueue = new PriorityQueue();
this.activeWorkers = new Set();
}
async executeTask(task: Task): Promise<Result> {
const worker = await this.getAvailableWorker();
this.activeWorkers.add(worker);
try {
return await this.runTaskInWorker(worker, task);
} finally {
this.activeWorkers.delete(worker);
this.releaseWorker(worker);
}
}
}
```
### 4.3 I/O Optimization
```typescript
class IOOptimizer {
private readonly PAGE_SIZE = 4096;
private readonly READ_AHEAD = 4;
constructor(private config: IOConfig) {
this.initializeIOBuffers();
}
private async readWithReadAhead(
fd: number,
position: number,
size: number
): Promise<Buffer> {
// Implement read-ahead buffering
const readAheadSize = this.PAGE_SIZE * this.READ_AHEAD;
const buffer = Buffer.allocUnsafe(readAheadSize);
await fs.read(fd, buffer, 0, readAheadSize, position);
return buffer.slice(0, size);
}
}
```
## 5. Integration Points
### 5.1 Cache Service Integration
```typescript
class EnhancedCacheService extends CacheService {
private fileReader: ParallelFileReader;
private memoryManager: MemoryManager;
private messageBroker: MessageBroker;
constructor(config: CacheServiceConfig) {
super(config);
this.initializeServices(config);
}
private async initializeServices(config: CacheServiceConfig) {
this.fileReader = new ParallelFileReader(config);
this.memoryManager = new MemoryManager(config.memoryManagement);
this.messageBroker = new MessageBroker();
await this.setupMessageHandlers();
}
}
```
### 5.2 Event System Integration
```typescript
interface EventConfig {
maxListeners: number;
errorThreshold: number;
debugMode: boolean;
}
class EventSystem {
private eventEmitter: EventEmitter;
private errorCount: Map<string, number>;
constructor(private config: EventConfig) {
this.eventEmitter = new EventEmitter();
this.errorCount = new Map();
this.setupErrorHandling();
}
private setupErrorHandling() {
this.eventEmitter.on('error', (error: Error) => {
this.handleError(error);
});
}
}
```
## 6. Configuration Examples
### 6.1 Development Configuration
```typescript
const devConfig: CacheServiceConfig = {
maxSize: 1000,
parallelProcessing: {
enabled: true,
maxWorkers: 4,
chunkSize: 1024 * 1024
},
memoryManagement: {
maxMemoryPercent: 70,
gcThreshold: 0.8,
emergencyThreshold: 0.95
},
storage: {
persistToDisk: true,
compressionLevel: 1,
storageLocation: './cache'
}
};
```
### 6.2 Production Configuration
```typescript
const prodConfig: CacheServiceConfig = {
maxSize: 5000,
parallelProcessing: {
enabled: true,
maxWorkers: 8,
chunkSize: 2 * 1024 * 1024
},
memoryManagement: {
maxMemoryPercent: 85,
gcThreshold: 0.75,
emergencyThreshold: 0.9
},
storage: {
persistToDisk: true,
compressionLevel: 4,
storageLocation: '/var/cache/mcp'
}
};
```
### 6.3 Containerized Configuration
```typescript
const containerConfig: CacheServiceConfig = {
maxSize: 2000,
parallelProcessing: {
enabled: true,
maxWorkers: 2,
chunkSize: 512 * 1024
},
memoryManagement: {
maxMemoryPercent: 60,
gcThreshold: 0.7,
emergencyThreshold: 0.85
},
storage: {
persistToDisk: false
}
};
```