All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Linux filesystem caching discussion list
	<linux-cachefs@redhat.com>,
	nfs@lists.sourceforge.net, Martin Waitz <tali@admingilde.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Steve Dickson <SteveD@redhat.com>,
	Clemens Schwaighofer <cs@tequila.co.jp>
Subject: Re: Re: [PATCH] NFS using CacheFS
Date: Wed, 13 Oct 2004 11:40:22 +0100	[thread overview]
Message-ID: <30245.1097664022@redhat.com> (raw)
In-Reply-To: <1097508639.20033.12.camel@lade.trondhjem.org>


Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
> That said, David & co.: why did you choose not to use something similar
> to the Solaris syntax for cachefs?

Well...

  (1) when I wrote cachefs I didn't know that Solaris had such a thing

  (2) I don't know what Solaris syntax is - I've seen one example, and that
      didn't make a lot of sense

  (3) my way doesn't involve any changes to userspace programs such as mount

> The "layered filesystem" syntax has the advantage that it would avoid
> entirely the need to change the NFS mount syntax,

And the disadvantage that we'd have to change the VFS to support it, I
think. I don't know how this "layered filesystem" thing operates or is used,
so I'm guessing.

> and would make it easier to port cachefs to cifs etc.

I doubt it. The netfs still has to interact with fscache internally to decide
how match netfs files to cache files, which is what most of the interface is
about; and to push/pull pages to/from the cache (this bit could possibly be
made transparent, but I'm not sure how you'd do it on Linux with the present
VM & VFS interfaces).

David

--
Linux-cachefs mailing list
Linux-cachefs@redhat.com
http://www.redhat.com/mailman/listinfo/linux-cachefs

WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Linux filesystem caching discussion list 
	<linux-cachefs@redhat.com>, Martin Waitz <tali@admingilde.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	nfs@lists.sourceforge.net, Steve Dickson <SteveD@redhat.com>,
	Clemens Schwaighofer <cs@tequila.co.jp>
Subject: Re: [Linux-cachefs] Re: [PATCH] NFS using CacheFS
Date: Wed, 13 Oct 2004 11:40:22 +0100	[thread overview]
Message-ID: <30245.1097664022@redhat.com> (raw)
In-Reply-To: <1097508639.20033.12.camel@lade.trondhjem.org>


Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
> That said, David & co.: why did you choose not to use something similar
> to the Solaris syntax for cachefs?

Well...

  (1) when I wrote cachefs I didn't know that Solaris had such a thing

  (2) I don't know what Solaris syntax is - I've seen one example, and that
      didn't make a lot of sense

  (3) my way doesn't involve any changes to userspace programs such as mount

> The "layered filesystem" syntax has the advantage that it would avoid
> entirely the need to change the NFS mount syntax,

And the disadvantage that we'd have to change the VFS to support it, I
think. I don't know how this "layered filesystem" thing operates or is used,
so I'm guessing.

> and would make it easier to port cachefs to cifs etc.

I doubt it. The netfs still has to interact with fscache internally to decide
how match netfs files to cache files, which is what most of the interface is
about; and to push/pull pages to/from the cache (this bit could possibly be
made transparent, but I'm not sure how you'd do it on Linux with the present
VM & VFS interfaces).

David

  parent reply	other threads:[~2004-10-13 10:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-04 20:45 [PATCH] NFS using CacheFS Steve Dickson
2004-10-04 21:53 ` Trond Myklebust
2004-10-04 21:53   ` Trond Myklebust
2004-10-05 10:01   ` David Howells
2004-10-08  4:36 ` Clemens Schwaighofer
2004-10-08  9:02   ` [Linux-cachefs] " David Howells
2004-10-08 11:22   ` Steve Dickson
2004-10-08 15:39     ` Clemens Schwaighofer
2004-10-11 14:23     ` Martin Waitz
2004-10-11 14:23       ` Martin Waitz
2004-10-11 15:18       ` David Howells
2004-10-11 15:18         ` [Linux-cachefs] " David Howells
2004-10-11 15:30       ` Trond Myklebust
2004-10-11 15:30         ` Trond Myklebust
2004-10-11 20:31         ` accessing/modifiying the nfs share files as different users bruce
2004-10-13 10:40         ` David Howells [this message]
2004-10-13 10:40           ` [Linux-cachefs] Re: [PATCH] NFS using CacheFS David Howells

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=30245.1097664022@redhat.com \
    --to=dhowells@redhat.com \
    --cc=SteveD@redhat.com \
    --cc=cs@tequila.co.jp \
    --cc=linux-cachefs@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nfs@lists.sourceforge.net \
    --cc=tali@admingilde.org \
    --cc=trond.myklebust@fys.uio.no \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.