C#日志存储优化的五种方法

// 错误示范：日志文件无轮转，无限增长
var logger = new LoggerConfiguration()
    .WriteTo.File("logs/service.log")
    .CreateLogger();

// 正确示范：配置日志轮转，避免"垃圾山"
var logger = new LoggerConfiguration()
    .WriteTo.File(
        path: "logs/service-{Date}.log",
        rollingInterval: RollingInterval.Day, // 每天轮转
        retainedFileCountLimit: 7, // 保留7天日志
        fileSizeLimitBytes: 10_000_000 // 文件大小限制为10MB
    )
    .CreateLogger();

// 错误示范：不压缩日志文件
var logger = new LoggerConfiguration()
    .WriteTo.File("logs/service.log")
    .CreateLogger();

// 正确示范：使用Gzip压缩日志文件
var logger = new LoggerConfiguration()
    .WriteTo.File(
        path: "logs/service-{Date}.log.gz",
        rollingInterval: RollingInterval.Day,
        retainedFileCountLimit: 7,
        fileSizeLimitBytes: 10_000_000,
        buffered: true // 缓冲写入，提高性能
    )
    .CreateLogger();

// 错误示范：只存储在本地文件系统
var logger = new LoggerConfiguration()
    .WriteTo.File("logs/service.log")
    .CreateLogger();

// 正确示范：使用Azure Log Analytics远程存储
var logger = new LoggerConfiguration()
    .WriteTo.AzureAppInsights(
        instrumentationKey: "your-instrumentation-key",
        logLevel: LogEventLevel.Information
    )
    .CreateLogger();

// 错误示范：记录所有级别日志
var logger = new LoggerConfiguration()
    .MinimumLevel.Debug() // 记录所有级别日志
    .WriteTo.File("logs/service.log")
    .CreateLogger();

// 正确示范：按环境设置日志级别
var logger = new LoggerConfiguration()
    .MinimumLevel.Information() // 生产环境只记录Information及以上
    .WriteTo.File("logs/service.log")
    .CreateLogger();

// 错误示范：日志格式冗长，占用空间大
var logger = new LoggerConfiguration()
    .WriteTo.File("logs/service.log", outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss} [{Level}] {Message}{NewLine}")
    .CreateLogger();

// 正确示范：使用紧凑日志格式
var logger = new LoggerConfiguration()
    .WriteTo.File(
        "logs/service.log",
        outputTemplate: "{Timestamp:yyyy-MM-dd} {Level:u3} {Message}{NewLine}{Exception}"
    )
    .CreateLogger();