linux-kernel - Re: Question about pNFS documentation

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Message-ID: <4BA53556BED3049F+15d632a4-567a-4350-b4a3-c4ba77721fa5@chenxiaosong.com>
Date: Fri, 14 Jun 2024 23:40:57 +0800
From: ChenXiaoSong <chenxiaosong@...nxiaosong.com>
To: Chuck Lever III <chuck.lever@...cle.com>
Cc: Trond Myklebust <trond.myklebust@...merspace.com>,
 Anna Schumaker <anna@...nel.org>, Benjamin Coddington <bcodding@...hat.com>,
 Olga Kornievskaia <kolga@...app.com>, Josef Bacik <josef@...icpanda.com>,
 Jeff Layton <jlayton@...nel.org>, neilb@...e.de, kolga@...app.com,
 Dai.Ngo@...cle.com, tom@...pey.com,
 Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 "liuzhengyuan@...inos.cn" <liuzhengyuan@...inos.cn>,
 "huhai@...inos.cn" <huhai@...inos.cn>,
 "chenxiaosong@...inos.cn" <chenxiaosong@...inos.cn>
Subject: Re: Question about pNFS documentation

Thanks very much for your detailed reply.

在 2024/6/14 21:00, Chuck Lever III 写道:
> 
>> On Jun 14, 2024, at 4:37 AM, ChenXiaoSong <chenxiaosong@...nxiaosong.com> wrote:
>>
>> Thanks for your reply. By the way, are there any plans for the Linux NFS server to implement the file, flexfile and object layout?
> 
> The object layout type has been deprecated, IIRC. Support for
> that type was removed from the Linux NFS client years ago. No
> support for it in the server is planned.
> 
> The file layout type generally needs a cluster file system
> on the back end. You could build something over Ceph or
> gfs2, but it would be a significant effort and would need
> user demand. Currently there isn't any.
> 
> The NFS server has a toy flexfile layout implementation
> which is not much more than a proof of concept. We do have
> an unscoped to-do to look at building that out to provide
> a platform for testing the client's flexfile support. That
> effort is not a high priority.
> 
> 
> --
> Chuck Lever
> 
>