Ocfs2 users - Jul 2011 - OCFS2 - no space left on device

Hi,

a few days ago we ran into a problem regarding our ocfs2 device. We got
the message no space left on device. But there were still 64GB free.

I then search the web and got two anders.
1.)
http://www.novell.com/support/viewContent.do?externalId=7008696&sliceId=1

I'm a little bit confused right now. Yes we have only a block and
cluster size of 12 bits but i created the volume with -T mail and
shouldn't mail be for a lot of small files?
In the novell document it says "4Kb block size is a good recommendation
for a small number of large files".

2.) discontig-bg flag
Sadly i cannot enable it as the debian squeeze 2.6.32 kernel doesn't
support it. Is there a backport available from oracle? So i can build a
new kernel myself.

And how can i check whether my problem is due to 12bit or due to
discontig-bg flag? Or will the discontig-bg also solve the 12 bit problem?

Stefan

Hi Stefan,

On Mon, Jul 18, 2011 at 3:50 AM, Stefan Priebe - Profihost AG
<s.priebe at profihost.ag> wrote:
> Hi,
>
> a few days ago we ran into a problem regarding our ocfs2 device. We got
> the message no space left on device. But there were still 64GB free.
>
> I then search the web and got two anders.
> 1.)
>
http://www.novell.com/support/viewContent.do?externalId=7008696&sliceId=1
>
> I'm a little bit confused right now. Yes we have only a block and
> cluster size of 12 bits but i created the volume with -T mail and
> shouldn't mail be for a lot of small files?
> In the novell document it says "4Kb block size is a good
recommendation
> for a small number of large files".

This was an error and we have fixed the document. However your problem
could be caused due to different reasons. Most often it is
fragmentation. An output of
http://oss.oracle.com/~smushran/debug/scripts/stat_sysdir.sh may help
us identify the cause.
>
> 2.) discontig-bg flag
> Sadly i cannot enable it as the debian squeeze 2.6.32 kernel doesn't
> support it. Is there a backport available from oracle? So i can build a
> new kernel myself.
>
> And how can i check whether my problem is due to 12bit or due to
> discontig-bg flag? Or will the discontig-bg also solve the 12 bit problem?
>



-- 
Goldwyn

Hi Goldwyn,

thanks for fixing the novell page. It really confused me ;-)
> This was an error and we have fixed the document. However your problem
> could be caused due to different reasons. Most often it is
> fragmentation. An output of
> http://oss.oracle.com/~smushran/debug/scripts/stat_sysdir.sh may help
> us identify the cause.
Output is attached.

Greets
Stefan
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