From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id EAC9F7F56 for ; Wed, 12 Jun 2013 19:48:46 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay1.corp.sgi.com (Postfix) with ESMTP id D98A38F8049 for ; Wed, 12 Jun 2013 17:48:43 -0700 (PDT) Received: from ipmail05.adl6.internode.on.net (ipmail05.adl6.internode.on.net [150.101.137.143]) by cuda.sgi.com with ESMTP id IoaAPGMcj5to1m7g for ; Wed, 12 Jun 2013 17:48:42 -0700 (PDT) Date: Thu, 13 Jun 2013 10:48:40 +1000 From: Dave Chinner Subject: Re: Questions about XFS Message-ID: <20130613004840.GZ29338@dastard> References: <51B72D3D.5010206@redhat.com> <1371025611.7096.10.camel@acme> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1371025611.7096.10.camel@acme> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Roger Oberholtzer Cc: xfs@oss.sgi.com On Wed, Jun 12, 2013 at 10:26:51AM +0200, Roger Oberholtzer wrote: > On Tue, 2013-06-11 at 11:12 -0500, Steve Bergman wrote: > > Are you saying that with XFS there is no periodic > > flushing mechanism at all? And that unless there's an > > fsync/fdatasync/sync or the memory needs to be reclaimed, that it can > > sit in the page cache forever? > > I read the later responses to this and they seemed to say that the data > in the page cache should be written to the disk periodically. I am not > meaning to hijack the thread. I just have a question directly related to > this point. > > I have an application that is streaming data to an XFS disk at a > sustained 25 MB/sec. This is well below what the hardware supports. The > application does fopen/fwrite/fclose (no active flushing or syncing). fadvise(DONTNEED) Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs