All of lore.kernel.org
 help / color / mirror / Atom feed
From: Kalpak Shah <kalpak@clusterfs.com>
To: cmm@us.ibm.com
Cc: linux-ext4 <linux-ext4@vger.kernel.org>,
	Andreas Dilger <adilger@clusterfs.com>,
	Jean noel Cordenner <jean-noel.cordenner@bull.net>
Subject: Re: [PATCH 4/6] add noversion mount option
Date: Fri, 15 Jun 2007 03:22:06 +0530	[thread overview]
Message-ID: <1181857932.3926.4.camel@garfield> (raw)
In-Reply-To: <1181854214.3883.10.camel@dyn9047017103.beaverton.ibm.com>

On Thu, 2007-06-14 at 13:50 -0700, Mingming Cao wrote:
> On Thu, 2007-06-14 at 21:26 +0530, Kalpak Shah wrote:
> > This patch adds a "noversion" mount option to disable inode version
> > updates.
> 
> Can you explain a bit more why we need this mount option? Is it because
> of performance concern? 

Lustre requires the counter to be globally unique on the entire
filesystem and hence needs to turnoff per-inode version updates. So in
the interlock meeting on 5th June, Ted has suggested the this approach.

"- Ted suggested having a flag in the superblock for i_version, with an 
additional option of having a global counter for Lustre's requirements.
i_version would be on by default, but give users who do not use the 
feature the option to turn it off and avoid any performance impact."

Thanks,
Kalpak.

> 
> Mingming
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

  parent reply	other threads:[~2007-06-14 21:53 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1181835073.7779.9.camel@garfield>
2007-06-14 15:56 ` [PATCH 1/6] Separated 64-bit i_version patch Kalpak Shah
2007-06-14 20:58   ` Mingming Cao
2007-06-14 21:41     ` Andreas Dilger
2007-06-14 15:56 ` [PATCH 2/6] add i_version_hi to ext4_inode Kalpak Shah
2007-06-14 15:56 ` [PATCH 3/6] Changes for 64-bit i_version Kalpak Shah
2007-06-14 15:56 ` [PATCH 4/6] add noversion mount option Kalpak Shah
2007-06-14 20:50   ` Mingming Cao
2007-06-14 21:42     ` Andreas Dilger
2007-06-14 21:52     ` Kalpak Shah [this message]
2007-06-14 22:28       ` Mingming Cao
2007-06-14 15:59 ` Kalpak Shah
2007-06-14 15:59 ` [PATCH 5/6] VFS updates to i_version Kalpak Shah
2007-06-14 15:59 ` [PATCH 6/6] Updated series file Kalpak Shah

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=1181857932.3926.4.camel@garfield \
    --to=kalpak@clusterfs.com \
    --cc=adilger@clusterfs.com \
    --cc=cmm@us.ibm.com \
    --cc=jean-noel.cordenner@bull.net \
    --cc=linux-ext4@vger.kernel.org \
    /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.