switching to temporarily use glog library

go/storage/needle_read_write.go

@@ -5,7 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
+	"code.google.com/p/weed-fs/go/glog"
 	"os"
 )
 
@@ -27,12 +27,12 @@ func (n *Needle) Append(w io.Writer, version Version) (size uint32, err error) {
 			defer func(s io.Seeker, off int64) {
 				if err != nil {
 					if _, e = s.Seek(off, 0); e != nil {
-						log.Printf("Failed to seek %s back to %d with error: %s\n", w, off, e)
+						glog.V(0).Infof("Failed to seek %s back to %d with error: %s", w, off, e.Error())
 					}
 				}
 			}(s, end)
 		} else {
-			err = fmt.Errorf("Cnnot Read Current Volume Position: %s", e)
+			err = fmt.Errorf("Cnnot Read Current Volume Position: %s", e.Error())
 			return
 		}
 	}