[Lustre-discuss] Experienced New User needing help

[Klaus Steden]

No, you won¹t be able to write to either the OST or MDS directories, or even
examine them ... they¹re just mount points to provide you with feedback
about disk usage.

I read in the docs that future releases may do something more useful with
these mount points, but for now, that¹s all they do. :-)

cheers,
Klaus

On 10/26/07 1:47 AM, "Iain Grant" <Iain.Grant at scri.ac.uk>did etch on stone
tablets:

> Sorry please Ignore me, I have now done a
>  
> mount -t lustre 143.234.96.46 at tcp0:/testfs /mnt/test
>  
> and can write to the /mnt/test area.
> I thought I would be able to write to the OST area, apologies
>  
> Iain
>  
> 
> 
> From: lustre-discuss-bounces at clusterfs.com
> [mailto:lustre-discuss-bounces at clusterfs.com] On Behalf Of Iain Grant
> Sent: 26 October 2007 09:42
> To: lustre-discuss at clusterfs.com
> Subject: [Lustre-discuss] Experienced New User needing help
>  
> Sorry folks I¹m still not getting any life from this.
> I¹ve followed the manual and the following steps
>  
> Module options for networking should first be set up in /etc/modprobe.conf,
> e.g. 
>   # Networking options, see /sys/module/lnet/parameters
>   options lnet networks=tcp
>   # end Lustre modules
> [edit 
> <http://wiki.lustre.org/index.php?title=Mount_Conf&action=edit&section
> =6> ]
> Making and starting a filesystem
> combo MDT/MGS on my single node'
> mkfs.lustre --fsname=testfs --mdt --mgs /dev/sda1
> mkdir -p /mnt/test/mdt
> mount -t lustre /dev/sda1 /mnt/test/mdt
> cat /proc/fs/lustre/devices
>    0 UP mgs MGS MGS 5
>   1 UP mgc MGC143.234.96.46 at tcp 303242f4-5aa3-5377-4895-90a397d56153 5
>   2 UP mdt MDS MDS_uuid 3
>   3 UP lov testfs-mdtlov testfs-mdtlov_UUID 4
>   4 UP mds testfs-MDT0000 testfs-MDT0000_UUID 3
> Then I configured OST on the same node
> mkfs.lustre --fsname=testfs --ost --mgsnode=143.234.96.46 at tcp0 /dev/sda2
> mkdir -p /mnt/test/ost0
> mount -t lustre /dev/sda2 /mnt/test/ost0
>  
> when I cd to /mnt/test/ost0 I get
>  
> Not a directory messages ???
>  
> If  I do a df I can see the filesystems mounted.
>  
> When I look at /var/log/messages I can see
>  
>  
> Oct 26 09:33:40 fraggle kernel: Lustre: Filtering OBD driver;
> info at clusterfs.com
> Oct 26 09:33:40 fraggle kernel: Lustre: testfs-OST0000: new disk, initializing
> Oct 26 09:33:41 fraggle kernel: Lustre: OST testfs-OST0000 now serving dev
> (testfs-OST0000/01493618-db27-ba73-4d41-6ab062fa5355) with recovery enabled
> Oct 26 09:33:41 fraggle kernel: Lustre: Server testfs-OST0000 on device
> /dev/sdb2 has started
> Oct 26 09:33:43 fraggle kernel: Lustre: testfs-OST0000: received MDS
> connection from 0 at lo
> Oct 26 09:33:43 fraggle kernel: Lustre: MDS testfs-MDT0000:
> testfs-OST0000_UUID now active, resetting orphans
>  
>  
> ???? This is driving me nuts ???
>  
>  
>   
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