[CentOS] space problem

2012-06-13 Thread m . roth
CentOS 6.2. I have a 2TB drive, one partition, which is used for online
backups. It filled up the other day. I moved a couple of b/u directories
off it, and deleted the originals, which should have given me 42G free. I
also reduced the reserved blocks by 1/3rd.

I've just finished an fsck, which it needed anyway, and in which there was
a problem in an HTREE directory node.

df *still* tells me that there are zero bytes free.

Clues?

mark

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Re: [CentOS] space problem

2012-06-13 Thread Keith Keller
On 2012-06-13, m.r...@5-cent.us m.r...@5-cent.us wrote:
 CentOS 6.2. I have a 2TB drive, one partition, which is used for online
 backups. It filled up the other day. I moved a couple of b/u directories
 off it, and deleted the originals, which should have given me 42G free. I
 also reduced the reserved blocks by 1/3rd.

How are you taking backups?  If you're using something like rsnapshot,
you may have only deleted one of the many hard links to your files.  In
doing so you may have removed the directory entries but your files are
still there.  (That should still have freed up some space, just not
much.)

Also, perhaps check df -i?

--keith


-- 
kkel...@wombat.san-francisco.ca.us


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Re: [CentOS] space problem

2012-06-13 Thread Steven Tardy
On 06/13/2012 12:18 PM, m.r...@5-cent.us wrote:
 CentOS 6.2. I have a 2TB drive, one partition, which is used for online
 backups. It filled up the other day. I moved a couple of b/u directories
 off it, and deleted the originals, which should have given me 42G free. I
 also reduced the reserved blocks by 1/3rd.

 I've just finished an fsck, which it needed anyway, and in which there was
 a problem in an HTREE directory node.

 df *still* tells me that there are zero bytes free.

 Clues?

maybe the files you removed are still open by some other process?
info unlink
  The `unlink' function deletes the file name FILENAME.  If this is
  a file's sole name, the file itself is also deleted.  (Actually,
  if any process has the file open when this happens, deletion is
  postponed until all processes have closed the file.)

use lsof to find processes which might still have the file open.
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Re: [CentOS] space problem

2012-06-13 Thread Johnny Hughes
On 06/13/2012 12:18 PM, m.r...@5-cent.us wrote:
 CentOS 6.2. I have a 2TB drive, one partition, which is used for online
 backups. It filled up the other day. I moved a couple of b/u directories
 off it, and deleted the originals, which should have given me 42G free. I
 also reduced the reserved blocks by 1/3rd.

 I've just finished an fsck, which it needed anyway, and in which there was
 a problem in an HTREE directory node.

 df *still* tells me that there are zero bytes free.

 Clues?

A 2TB drive is 2048 GB.

If it was 100% full, and if you freed up 42GB, then it would be:

2006/2048 = 98% full (well, 97.95% to be exact).

so it would only show 2% space free max anyway.





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Re: [CentOS] space problem

2012-06-13 Thread m . roth
Johnny Hughes wrote:
 On 06/13/2012 12:18 PM, m.r...@5-cent.us wrote:
 CentOS 6.2. I have a 2TB drive, one partition, which is used for online
 backups. It filled up the other day. I moved a couple of b/u directories
 off it, and deleted the originals, which should have given me 42G free.
 I also reduced the reserved blocks by 1/3rd.

 I've just finished an fsck, which it needed anyway, and in which there
 was a problem in an HTREE directory node.

 df *still* tells me that there are zero bytes free.

 Clues?

 A 2TB drive is 2048 GB.
 If it was 100% full, and if you freed up 42GB, then it would be:
 2006/2048 = 98% full (well, 97.95% to be exact).
 so it would only show 2% space free max anyway.

Actually, IIRC, one directory was 42G, and the other was 15G or so. That,
along with reducing the reserved blocks on the f/s should have given me
3%-4%. I know that; what's driving me nuts is df, not df -h, is showing
available as a blank.

Oh, and for the other folks who wondered, we use rsync with hard links.

  mark


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Re: [CentOS] space problem

2012-06-13 Thread Les Mikesell
On Wed, Jun 13, 2012 at 1:36 PM,  m.r...@5-cent.us wrote:

 Actually, IIRC, one directory was 42G, and the other was 15G or so. That,
 along with reducing the reserved blocks on the f/s should have given me
 3%-4%. I know that; what's driving me nuts is df, not df -h, is showing
 available as a blank.

 Oh, and for the other folks who wondered, we use rsync with hard links.


So... are you sure the things you removed to clear space were the
_last_ hardlinks to the data?  Otherwise, for the same reason you use
the links to save space, you don't get the space back.

-- 
   Les Mikesell
 lesmikes...@gmail.com
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Re: [CentOS] space problem

2012-06-13 Thread m . roth
Les Mikesell wrote:
 On Wed, Jun 13, 2012 at 1:36 PM,  m.r...@5-cent.us wrote:

 Actually, IIRC, one directory was 42G, and the other was 15G or so.
 That, along with reducing the reserved blocks on the f/s should have
given me
 3%-4%. I know that; what's driving me nuts is df, not df -h, is showing
 available as a blank.

 Oh, and for the other folks who wondered, we use rsync with hard links.

 So... are you sure the things you removed to clear space were the
 _last_ hardlinks to the data?  Otherwise, for the same reason you use
 the links to save space, you don't get the space back.

Well, I found a bit more space - of the two directories I moved, I'd
forgotten to delete one (I was doing an offline backup at the time, and
didn't want that to take more hours). I now see 0 available, and
 /dev/sdb11922858352 1892387276 0 100% /export/3

But even with that 60G + the reserved block count reduced from 24174711 to
16116474, it's still showing nothing free, and the used only shows 30G
free.

   mark

  mark

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Re: [CentOS] space problem

2012-06-13 Thread Yves Bellefeuille
On Wednesday 13 June 2012, Johnny Hughes joh...@centos.org wrote:

 If it was 100% full, and if you freed up 42GB, then it would be:
 
 2006/2048 = 98% full (well, 97.95% to be exact).
 
 so it would only show 2% space free max anyway.

And by default 5% is reserved for root, so a drive can be 5% free and 
still say it's full to a normal user. 

Yves

-- 
Yves Bellefeuille y...@storm.ca
La Esperanta Civito ne rifuzas anticipe la kunlaboron de erarintoj, se
ili konscias pri sia eraro. -- Heroldo Komunikas, n-ro 473.
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