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Re: [Linux-cluster] 'df' not accurate?



GFS caches the information used to perform a "df" in little chunks of
cluster memory (called LVBs) associated with each bitmap lock.  The data
probably got corrupted somehow.  The "gfs_tool reclaim" caused the
data to be reinitialzed from disk.  ("Gfs_tool shrink" should have done
that too.  I'm not sure why it didn't.)

Maybe there's a bug in the lock_dlm LVB recovery code or a bug has crept
into the filesystem code.


On Thu, Nov 18, 2004 at 04:58:05PM -0600, Brynnen R Owen wrote:
> Ok, that seems to fix the reporting.  Can you hit me with a
> clue-by-four as to what likely happened?  We did perform a fence test
> where we ripped the power cord out from a computer.  Did that hose
> metadata?
> 
> On Thu, Nov 18, 2004 at 04:46:12PM -0600, Ken Preslan wrote:
> > On Thu, Nov 18, 2004 at 04:02:49PM -0600, Brynnen R Owen wrote:
> > > No change.  All nodes in the cluster appear to agree on the wrong size
> > > as well.
> > 
> > What does a "gfs_tool reclaim /mountpoint" do?
> > 
> > -- 
> > Ken Preslan <kpreslan redhat com>
> > 
> 
> -- 
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> <>  Brynnen Owen            (     this space for rent                      )<>
> <>  owen uiuc edu           (                                              )<>
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

-- 
Ken Preslan <kpreslan redhat com>


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