From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: a simple and scalable pNFS block layout server V2 Date: Thu, 22 Jan 2015 17:21:00 +0100 Message-ID: <20150122162100.GA10801@lst.de> References: <1421925006-24231-1-git-send-email-hch@lst.de> <0851E625-04F8-4DE0-971D-1EAB591B3F28@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: "J. Bruce Fields" , Jeff Layton , Linux NFS Mailing List , linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com To: Chuck Lever Return-path: Received: from verein.lst.de ([213.95.11.211]:49051 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752530AbbAVQVE (ORCPT ); Thu, 22 Jan 2015 11:21:04 -0500 Content-Disposition: inline In-Reply-To: <0851E625-04F8-4DE0-971D-1EAB591B3F28@oracle.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Thu, Jan 22, 2015 at 11:04:15AM -0500, Chuck Lever wrote: > I=E2=80=99m still not clear on what layout types are supported. Clear= ly > the block layout type is supported. But you mention XFS here. Does > that mean file layouts are also supported now? If so, can you > briefly describe the architecture and any current limitations? >=20 > Did I miss documentation for how administrators construct layouts? Only block layouts are supporte at the moment. They are automatically enabled when an XFS filesystem is exported. There is no requirement for the administrator to construct in layout, the only requirement for working block layouts is shared storage that is accessible to the NFS Server / MDS and the clients that wish to use pNFS=E2=80=A5 If you are interested in file layout support porting over the existing file layout drivers from the old pNFS server tree should only be a moderate effort, and at least the lexp code would be grately simplified by the common recall infrastructure in this series. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html