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<TITLE>Re: [Lustre-discuss] Experienced New User needing help</TITLE>
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No, you won’t be able to write to either the OST or MDS directories, or even examine them ... they’re just mount points to provide you with feedback about disk usage.<BR>
<BR>
I read in the docs that future releases may do something more useful with these mount points, but for now, that’s all they do. :-)<BR>
<BR>
cheers,<BR>
Klaus<BR>
<BR>
On 10/26/07 1:47 AM, "Iain Grant" <Iain.Grant@scri.ac.uk>did etch on stone tablets:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT COLOR="#000080"><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Sorry please Ignore me, I have now done a <BR>
<BR>
mount -t lustre 143.234.96.46@tcp0:/testfs /mnt/test<BR>
<BR>
and can write to the /mnt/test area.<BR>
I thought I would be able to write to the OST area, apologies<BR>
<BR>
Iain<BR>
<BR>
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<FONT SIZE="4"><FONT FACE="Tahoma"><SPAN STYLE='font-size:13.0px'><B>From:</B> lustre-discuss-bounces@clusterfs.com [<a href="mailto:lustre-discuss-bounces@clusterfs.com]">mailto:lustre-discuss-bounces@clusterfs.com]</a> <B>On Behalf Of </B>Iain Grant<BR>
<B>Sent:</B> 26 October 2007 09:42<BR>
<B>To:</B> lustre-discuss@clusterfs.com<BR>
<B>Subject:</B> [Lustre-discuss] Experienced New User needing help<BR>
</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'> <BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Sorry folks I’m still not getting any life from this. <BR>
I’ve followed the manual and the following steps <BR>
<BR>
</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'>Module options for networking should first be set up in /etc/modprobe.conf, e.g. <BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'> # Networking options, see /sys/module/lnet/parameters<BR>
options lnet networks=tcp<BR>
# end Lustre modules<BR>
</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'>[edit <a href="http://wiki.lustre.org/index.php?title=Mount_Conf&action=edit§ion=6"><http://wiki.lustre.org/index.php?title=Mount_Conf&action=edit&section=6></a> ]<BR>
</SPAN><SPAN STYLE='font-size:17.0px'><B>Making and starting a filesystem <BR>
</B></SPAN><SPAN STYLE='font-size:16.0px'>combo MDT/MGS on my single node' <BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>mkfs.lustre --fsname=testfs --mdt --mgs /dev/sda1<BR>
mkdir -p /mnt/test/mdt<BR>
mount -t lustre /dev/sda1 /mnt/test/mdt<BR>
cat /proc/fs/lustre/devices<BR>
0 UP mgs MGS MGS 5<BR>
1 UP mgc MGC143.234.96.46@tcp 303242f4-5aa3-5377-4895-90a397d56153 5<BR>
2 UP mdt MDS MDS_uuid 3<BR>
3 UP lov testfs-mdtlov testfs-mdtlov_UUID 4<BR>
4 UP mds testfs-MDT0000 testfs-MDT0000_UUID 3<BR>
</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'>Then I configured OST on the same node <BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>mkfs.lustre --fsname=testfs --ost --mgsnode=143.234.96.46@tcp0 /dev/sda2<BR>
mkdir -p /mnt/test/ost0<BR>
mount -t lustre /dev/sda2 /mnt/test/ost0<BR>
</SPAN></FONT><SPAN STYLE='font-size:13.0px'><FONT FACE="Arial"> <BR>
when I cd to /mnt/test/ost0 I get<BR>
<BR>
Not a directory messages ???<BR>
<BR>
If I do a df I can see the filesystems mounted.<BR>
<BR>
When I look at /var/log/messages I can see<BR>
<BR>
<BR>
Oct 26 09:33:40 fraggle kernel: Lustre: Filtering OBD driver; info@clusterfs.com<BR>
Oct 26 09:33:40 fraggle kernel: Lustre: testfs-OST0000: new disk, initializing<BR>
Oct 26 09:33:41 fraggle kernel: Lustre: OST testfs-OST0000 now serving dev (testfs-OST0000/01493618-db27-ba73-4d41-6ab062fa5355) with recovery enabled<BR>
Oct 26 09:33:41 fraggle kernel: Lustre: Server testfs-OST0000 on device /dev/sdb2 has started<BR>
Oct 26 09:33:43 fraggle kernel: Lustre: testfs-OST0000: received MDS connection from 0@lo<BR>
Oct 26 09:33:43 fraggle kernel: Lustre: MDS testfs-MDT0000: testfs-OST0000_UUID now active, resetting orphans<BR>
<BR>
<BR>
???? This is driving me nuts ???<BR>
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