Re: [Moosefs-users] mfs access problem

[Leonid S. <leo...@ar...>]

Greetings!
The problem was recently discussed:
you must have more than 1Gb of free space on a chunk server for the data to
be written to it (see documentation!),
so that's where come the zero lenght files you get.
Errors of failed writing operation may not be reported not because of
MuseFS, but because
the programs (shell redirection, nano text editor and more) are just not
checking for success of failure.
Try vim text editor to create a file at the filesystem - it will report
error to you.
So, create chunk storage of more than 1Gb capacity.
---------------
And you should NOT touch 'weird' directories - that's the backend structure 
of MuseFS.





----- Original Message ----- 
From: "Piotr Skurczak" <pio...@gm...>
To: <moo...@li...>
Sent: Sunday, January 09, 2011 2:19 AM
Subject: [Moosefs-users] mfs access problem


> Hello everyone!
>
> So, I'm quite new to MooseFS, I've installed the whole system recently,
> including master and chunk deamon, etc.
> The problem I encountered (and can't get through) is most probably the
> access/permission problem.
>
> This is how the situation looks like :
>
> I have 3 servers, 1 of them is VPS (what means it has no access to
> /dev/fuse, nor /dev/loop), 2 are real servers having WAN ip and etc.
> I decided to use VPS as mfsmaster, and the rest would be chunk servers. I
> haven't got separate disks, so I used /dev/loop on chunk servers to create
> 500 MB ext3 file system and mounted it, as it has been described in the
> manual.
>
> # df -m
> Filesystem           1M-blocks      Used Available Use% Mounted on
> /data/mfsdisk              462        11       428   3% /mnt/mfschunk
>
> Now, when I run the master server, and chunks, and on one of them I use so
> called 'client' (mfsmount) and - everything works :
>
> # df -m
> /data/mfsdisk              462        11       428   3% /mnt/mfschunk
> mfsmaster:9421             343         0       343   0% /mnt/mfs
>
> except of that I can't write to /mnt/mfs. Basically I managed to touch
> empty
> files as well as to create empty directories, but no sooner do I echo
> anything to any files than it gives me an error :
> No space left on the device.
>
> Sometimes it does not say anything, for instance :
>
> [root@chunk mfs]# touch file
> [root@chunk mfs]# echo "test" >> file
> [root@chunk mfs]# ls -la file
> -rw-r--r-- 1 999 999 0 Jan  9 00:13 file
>
> What I have noticed is that under /mnt/mfschunk (where the pseudo hdd is
> mounted) there are lots of weird directories. Not sure if I ought to touch
> them...
> 00  07  0E  15  1C  23  2A  31  38  3F  46  4D  54
>
> I would very much appreciate any help in this matter.
>
> Kind Regards,
> Peter
>


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