Append to the same files from many places and serialize the writes
Usage:
package main
import "github.com/roffe/multiwriter"
import "bytes"
func main() {
mw := multiwriter.New(1, 16, 3, 128, true)
defer mw.Stop()
body := bytes.NewReader([]byte("My test string"))
mw.Write("./test.txt", body)
}