Go program using minio-go to upload objects in parallel

concurrent-upload.go

package main

import (
       "fmt"
       "sync"
       "os"
       
       "github.com/minio/minio-go"
)

func main() {
     mc1, err := minio.New("localhost:9001", "minio", "minio123", false)
     if err != nil {
     	fmt.Println(err)
        return
     }
     mc2, err := minio.New("localhost:9002", "minio", "minio123", false)
     if err != nil {
     	fmt.Println(err)
        return
     }
     
    wg := sync.WaitGroup{}
     for i := 0; i < 10; i++ {
     	 wg.Add(1)
     	 go func(gid int) {
     	    defer wg.Done()
     	    file, err := os.Open(`c:\Users\Atul\Downloads\go1.7.4.windows-amd64.msi`)
     	    if err != nil {
     	        fmt.Println(gid+1, err)
     		return
     	    }
     	    defer file.Close()
     	    var mc *minio.Client
     	    if gid % 2 == 0 {
     	       mc = mc1
     	    } else {
     	       mc = mc2
     	    }
     	    _, err = mc.PutObject("test", "minio.exe", file, "application/octet-stream")
     	    if err != nil {
     	       fmt.Println(gid+1, err)
     	       return
     	    }
     	    fmt.Printf("%d upload was successful\n", gid+1)
     	 }(i)
     }
     wg.Wait()
     fmt.Println("we are done here")
}