From: Patrick Caulfield <caulfield@sistina.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] Sharing LVM's via NFS on Redhat 8.0
Date: Fri Feb 21 02:22:02 2003 [thread overview]
Message-ID: <20030221082208.GA1810@tykepenguin.com> (raw)
In-Reply-To: <F66Jmn8eeGbdBmM9SJL000066dc@hotmail.com>
On Tue, Feb 18, 2003 at 12:27:49AM +0000, DJ TweeQ wrote:
>
> Phone rings and i forget to complete my previous post :)
>
> Regarding Sharing LVM LV's via NFS on Redhat 8.0...ie. mounting an LV from
> another machine while already having a LV on the same machine. Is it ok or
> not ok? I was talking to a buddy and he doesn't think it's a problem or an
> issue but...
>
> the current documentation on Sistina's site states that sharing LV's is
> dangerous unless it's a SCSI or Fibre Storage Device?...and not only that
> ...adminisitration can only be done on one node? (is it really possible to
> create/resize lv's from one node/machine to another (that has an LV or was
> it meant to mean that it's only possible on cluster aware network storage
> devices)??? ....
>
Sharing over NFS is fine. What you are doing with NFS is sharing the filesystem.
The dangerous behaviour mentioned is when you are sharing the actual block
device that is the LV. A subtle but very important distinction.
This is safe:
+----+ NFS +---------+
| |---------| Box B |
|boxA| | |
+----+ +---------+
| SCSI/IDE/FC
|
^^^^^^^
|disks|
| |
| |
| |
^^^^^^^
This is dangerous:
+----+ +----+
| | | |
|boxA| |boxB|
+----+ +----+
\ /
^^^^^^^
|disks|
| |
| |
| |
^^^^^^^
patrick
next prev parent reply other threads:[~2003-02-21 2:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 13:44 [linux-lvm] Sharing LVM's via NFS on Redhat 8.0 DJ TweeQ
2003-02-21 2:22 ` Patrick Caulfield [this message]
2003-02-21 10:06 ` Jesse Keating
2003-02-21 11:26 ` grobe
2003-02-21 11:33 ` Jesse Keating
2003-02-26 8:00 ` [linux-lvm] High level architecture (Long) Stephen Perkins
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=20030221082208.GA1810@tykepenguin.com \
--to=caulfield@sistina.com \
--cc=linux-lvm@sistina.com \
/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.