BLog4go 高性能日志库

jopen 3年前


BLog4go is an efficient logging library written in the Go programming language, providing logging hook, log rotate, filtering and formatting log message.

BLog4go 是高性能日志库。创新地使用“边解析边输出”方法进行日志输出,同时支持回调函数、日志淘汰和配置文件。可以解决高并发,调用日志函数频繁的情境下,日志库造成的性能问题。


  • Partially write to the bufio.Writer as soon as posible while formatting message to improve performance
  • Support different logging output file for different logging level
  • Support configure with files in xml format
  • Configurable logrotate strategy
  • Call user defined hook in asynchronous mode for every logging action
  • Adjustable message formatting
  • Configurable logging behavier when looging on the fly without restarting
  • Suit configuration to the environment when logging start
  • Try best to get every done in background
  • File writer can be configured according to given config file
  • Different output writers
    • Console writer
    • File writer
    • Socket writer
    </li> </ul>


    package main    import (      log ""      "fmt"      "os"  )    // optionally set user defined hook for logging  type MyHook struct {      something string  }    // when log-level exceed level, call the hook  // level is the level associate with that logging action.  // message is the formatted string already written.  func (self *MyHook) Fire(level log.Level, message string) {      fmt.Println(message)  }    func main() {      // init a file write using xml config file      err := log.NewFileWriterFromConfigAsFile("config.xml")      if nil != err {          fmt.Println(err.Error())          os.Exit(1)      }      defer log.Close()        // initialize your hook instance      hook := new(MyHook)      log.SetHook(hook) // writersFromConfig can be replaced with writers      log.SetHookLevel(log.INFO)        // optionally set output colored      log.SetColored(true)        log.Debugf("Good morning, %s", "eddie")      log.Warn("It's time to have breakfast")    }


    <blog4go minlevel="info">      <filter levels="trace">          <rotatefile path="trace.log" type="time"></rotatefile>      </filter>      <filter levels="debug,info" colored="true">          <file path="debug.log"></file>      </filter>      <filter levels="error,critical">          <rotatefile path="error.log" type="size" rotateSize="50000000" rotateLines="8000000"></rotatefile>      </filter>  </blog4go>


    If you don't have the Go development environment installed, visit the Getting Started document and follow the instructions. Once you're ready, execute the following command:

    go get -u


    I do some benchmark on a HDD disk comparing amoung fmt,blog4go,seelog,logrus. Benchmark Code

    BenchmarkBlog4goSingleGoroutine-4                    1000000          1087 ns/op  BenchmarkBlog4goMultiGoroutine-4                       30000         56569 ns/op  BenchmarkFmtFormatSingleGoroutine-4                   300000          5104 ns/op  BenchmarkFmtFormatWithTimecacheSingleGoroutine-4      300000          4256 ns/op  BenchmarkFmtFormatWithTimecacheMultiGoroutine-4         3000        509579 ns/op  BenchmarkLogrusSingleGoroutine-4                      100000         13757 ns/op  BenchmarkLogrusWithTimecacheSingleGoroutine-4         100000         12752 ns/op  BenchmarkLogrusWithTimecacheMultiGoroutine-4            1000       2049809 ns/op  BenchmarkSeelogSingleGoroutine-4                       50000         32846 ns/op  BenchmarkSeelogMultiGoroutine-4                         1000       3191334 ns/op

    It shows that blog4go can write log very fast, especially in situation with multi goroutines running at the same time~




    Full examples please view EXAMPLES