From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Xin Zhao" Subject: Why must NFS access metadata in synchronous mode? Date: Thu, 1 Jun 2006 00:04:11 -0400 Message-ID: <4ae3c140605312104m441ca006j784a93354456faf8@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-fsdevel@vger.kernel.org Return-path: Received: from wr-out-0506.google.com ([64.233.184.233]:45788 "EHLO wr-out-0506.google.com") by vger.kernel.org with ESMTP id S1751711AbWFAEEM (ORCPT ); Thu, 1 Jun 2006 00:04:12 -0400 Received: by wr-out-0506.google.com with SMTP id 50so181375wri for ; Wed, 31 May 2006 21:04:11 -0700 (PDT) To: linux-kernel Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Until kernel 2.6.16, I think NFS still access metadata synchronously, which may impact performance significantly. Several years ago, paper "metadata update performance in file systems" already suggested using asynchronous mode in metadata access. I am curious why NFS does not adopt this suggestion? Can someone explain this? Thanks! Xin