<html><body bgcolor="#FFFFFF"><div>Why do you say that?<br><br>On Dec 19, 2008, at 4:59 AM, Sean Gray <<a href="mailto:sgray@bluestarinc.com">sgray@bluestarinc.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
Note of caution. FWIW It is not recommended to mount OCFS2 volumes via
NFS.<br>
<pre class="moz-signature" cols="72">Sean N. Gray
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Luis Freitas wrote:
<blockquote cite="mid:926862.23974.qm@web51401.mail.re2.yahoo.com" type="cite">
<pre wrap=""> What I mean is that they have the full TCP/IP stack in them, and provide a SCSI interface to the kernel, so there is no additional CPU load using them.
One could instead of using a iSCSI adapter, use a common etherned adapter and mount the iSCSI target using a software driver. The main CPU would have the additional load of disassembling the TCP/IP packets and routing them.
Btw, I never actually used one of these boards.
Regards,
Luis
--- On Fri, 12/19/08, David Coulson <a class="moz-txt-link-rfc2396E" href="mailto:david@davidcoulson.net"><<a href="mailto:david@davidcoulson.net">david@davidcoulson.net</a>></a> wrote:
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<pre wrap="">From: David Coulson <a class="moz-txt-link-rfc2396E" href="mailto:david@davidcoulson.net"><<a href="mailto:david@davidcoulson.net">david@davidcoulson.net</a>></a>
Subject: Re: [Ocfs2-users] hardware needed for OCFS
To: <a class="moz-txt-link-abbreviated" href="mailto:lfreitas34@yahoo.com"><a href="mailto:lfreitas34@yahoo.com">lfreitas34@yahoo.com</a></a>
Cc: <a class="moz-txt-link-abbreviated" href="mailto:ocfs2-users@oss.oracle.com"><a href="mailto:ocfs2-users@oss.oracle.com">ocfs2-users@oss.oracle.com</a></a>
Date: Friday, December 19, 2008, 10:26 AM
Typically I find folks use 'NAS" to refer to
filesystem level sharing (NFS, Samba), and SAN for block
level (FC, iSCSI).
There are plenty of iSCSI HBAs (I've only used the ones
from qlogic), however they don't 'simulate'
anything - They're just a SCSI adapter with an iSCSI
backend.
Luis Freitas wrote:
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<pre wrap=""> If your NAS can do iSCSI you could use it to provide
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<pre wrap="">a shared block device.
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<pre wrap=""> The performance wont be as good as a SAN as the data
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<pre wrap="">has to go through the kernel TCP/IP stack, it can be
comparable if you have a iSCSI IP accelerator board that
simulates a hba.
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<pre wrap="">Regards,
Luis
--- On Fri, 12/19/08, David Coulson
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<pre wrap=""><a class="moz-txt-link-rfc2396E" href="mailto:david@davidcoulson.net"><<a href="mailto:david@davidcoulson.net">david@davidcoulson.net</a>></a> wrote:
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<pre wrap="">From: David Coulson <a class="moz-txt-link-rfc2396E" href="mailto:david@davidcoulson.net"><<a href="mailto:david@davidcoulson.net">david@davidcoulson.net</a>></a>
Subject: Re: [Ocfs2-users] hardware needed for
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<pre wrap="">OCFS
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<pre wrap="">To: "Pete Kay" <a class="moz-txt-link-rfc2396E" href="mailto:petedao@gmail.com"><<a href="mailto:petedao@gmail.com">petedao@gmail.com</a>></a>
Cc: <a class="moz-txt-link-abbreviated" href="mailto:ocfs2-users@oss.oracle.com"><a href="mailto:ocfs2-users@oss.oracle.com">ocfs2-users@oss.oracle.com</a></a>
Date: Friday, December 19, 2008, 9:57 AM
OCFS2 requires a block device (local disk, direct
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<pre wrap="">attached,
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<pre wrap="">SAN), so it's not going to work with a NAS
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<pre wrap="">(Samba, NFS, etc)
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<pre wrap="">mount. You can, of course, share a OCFS2
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<pre wrap="">filesystem using Samba or NFS.
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<pre wrap="">Pete Kay wrote:
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<pre wrap="">Hi,
Does OCFS require NAS hardware to run or does
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<pre wrap="">normal
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<pre wrap="">PC hard disk work?
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<pre wrap="">Thanks,
Pete
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