Re: [Moosefs-users] Cannot write to mounted filesystem

[Dennis J. <den...@co...>]

Hi Michal,
thanks for the pointer I was already beginning to think that this might be 
a problem. You said I *should* have 50GB for chunkservers but can I get 
away with less? I've only started with MooseFS and right now I'm trying to 
use 4 virtual machines to get a feel for it and I do not intend to do any 
real work with it. The documentation talks about "several gigabytes". Would 
5 or 10 GB be sufficient as well?

If there is an absolute minimum then the chunkserver daemon should probably 
exit with an error if there is not enough space available to allow it to 
operate properly.

Regards,
   Dennis

On 08/02/2011 08:37 AM, Michal Borychowski wrote:
> Hi Dennis!
>
> You have too little disks. MooseFS reserves some space only for itself - it
> is not a percent of the disk size, but a fixed size. You should have at
> least 50GB for the chunkservers.
>
>
> Kind regards
> -Michal
>
>
> -----Original Message-----
> From: Dennis Jacobfeuerborn [mailto:den...@co...]
> Sent: Friday, July 29, 2011 10:21 PM
> To: moo...@li...
> Subject: [Moosefs-users] Cannot write to mounted filesystem
>
> Hi,
> I'm starting to play with MooseFS and while the setup seemed to work fine I
> ran into trouble after mounting it.
>
> My Setup is a Centos 6 host system and four Centos 6 virtual machines
> installed as master, metalogger and two chunk servers.
> Installing everything went smoothly and I can see the two chunk server in
> the cgi stats interface. Both chunk servers have a 1gb partition formatted
> as ext4 mounted under /mnt/data for the storage.
> The cgi interface shows 2GiB total space and 1.3GiB available.
>
> I can mount the filesystem on a client and df -h shows 1.4G of free space
> which looks ok. However the moment I try to copy a file no matter how small
> I immediately get a "No space left on device" error. Doing a "ls" after
> that shows the file on the filesystem with a size of 0 bytes. A "mkdir
> /mnt/mfs/test" for example works fine though.
>
> I see the following in the syslog on the client:
>
> Jul 29 21:47:11 centos6 mfsmount[9930]: file: 6, index: 0 - fs_writechunk
> returns status 21
> Jul 29 21:47:11 centos6 mfsmount[9930]: error writing file number 6: ENOSPC
> (No space left on device)
>
> Any ideas what the problem could be?
>
> Regards,
>     Dennis
>
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