From 1d6826a3b46163132a6c9267f0703ac2e1f912fe Mon Sep 17 00:00:00 2001
From: Sergey Nikolaev <prostuda@academ.org>
Date: Thu, 2 Jan 2025 08:09:28 +0700
Subject: [PATCH] architecture.md

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 architecture.md | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
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+# Manticore Load Tool Architecture
+
+## Files Structure
+
+### Main Files
+- `manticore-load` - Main executable script
+- `APP_VERSION` - Contains current version number
+- `architecture.md` - Architecture documentation
+- `LICENSE` - License information
+
+### Source Files (src/)
+- `configuration.php` - Configuration handling
+- `console_output.php` - Thread-safe console output
+- `progress_display.php` - Progress monitoring and display
+- `query_generator.php` - Query generation and caching
+- `statistics.php` - Performance statistics collection
+
+## Classes and Components
+
+### Configuration (configuration.php)
+- **Class: Configuration**
+  - Handles command-line arguments and process configurations
+  - Implements ArrayAccess interface
+  - Key methods:
+    - `parseCommandLine()` - Parses command line arguments
+    - `validate()` - Validates configuration parameters
+    - `getProcesses()` - Returns array of process configurations
+    - `isInsertQuery()` - Determines if query is INSERT/REPLACE
+
+### Console Output (console_output.php)
+- **Class: ConsoleOutput**
+  - Provides thread-safe console output functionality
+  - Key methods:
+    - `write()` - Thread-safe writing to STDOUT
+    - `writeLine()` - Writes line with newline
+    - `init()` - Initializes output semaphore
+
+### Progress Display (progress_display.php)
+- **Class: ProgressDisplay**
+  - Handles real-time display of loading progress
+  - Uses ColorTrait for terminal coloring
+  - Key methods:
+    - `update()` - Updates progress display
+    - `monitorProgressFiles()` - Monitors multiple process progress
+    - `formatBytes()` - Formats file sizes
+    - `getCpuUsage()` - Gets current CPU usage
+
+### Query Generator (query_generator.php)
+- **Class: QueryGenerator**
+  - Generates SQL queries based on patterns
+  - Handles query caching
+  - Key methods:
+    - `generateQueries()` - Main query generation method
+    - `parsePattern()` - Parses query pattern
+    - `generateValue()` - Generates values based on pattern
+
+### Statistics (statistics.php)
+- **Class: Statistics**
+  - Collects and analyzes performance metrics
+  - Key methods:
+    - `addOperations()` - Records completed operations
+    - `addQps()` - Records queries per second
+    - `addLatency()` - Records latency measurements
+    - `printReport()` - Outputs performance statistics
+
+- **Class: LatencyHistogram**
+  - Memory-efficient latency tracking
+  - Key methods:
+    - `add()` - Adds latency measurement
+    - `getPercentile()` - Calculates percentiles
+    - `getAverage()` - Calculates average latency
+
+- **Class: MonitoringStats**
+  - Tracks system metrics
+  - Key methods:
+    - `getStats()` - Retrieves current system metrics
+    - `close()` - Closes monitoring connection
+
+## Component Interactions
+
+### Process Flow
+1. `manticore-load` script:
+   - Parses command line arguments via Configuration
+   - Forks worker processes
+   - Monitors progress via ProgressDisplay
+
+2. Worker processes:
+   - Initialize Manticore connections
+   - Generate queries via QueryGenerator
+   - Execute queries and collect statistics
+   - Report progress via temporary files
+
+3. Progress monitoring:
+   - Parent process monitors all worker progress files
+   - Combines statistics from all processes
+   - Updates display in real-time
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