Re: Which version of nilfs do you use?

[Vyacheslav Dubeyko <slava-yeENwD64cLxBDgjK7y7TUQ@public.gmane.org>]

On Fri, 2012-12-28 at 15:12 +0800, Elmer Zhang wrote:
> Hi,
> 
> There was three bad btree nodes:
> 
> Dec 20 16:12:08 yf237 kernel: NILFS: bad btree node (blocknr=710153406): level = 0, flags = 0x2, nchildren = 25088
> Dec 20 16:12:08 yf237 kernel: NILFS error (device sdb2): nilfs_bmap_last_key: broken bmap (inode number=321775)
> --
> Dec 21 10:10:07 yf237 kernel: NILFS: bad btree node (blocknr=711343917): level = 199, flags = 0x60, nchildren = 16670
> Dec 21 10:10:07 yf237 kernel: NILFS error (device sdb2): nilfs_bmap_last_key: broken bmap (inode number=324685)
> --
> Dec 21 10:13:41 yf237 kernel: NILFS: bad btree node (blocknr=14167806): level = 0, flags = 0x0, nchildren = 0
> Dec 21 10:13:41 yf237 kernel: NILFS error (device sdb2): nilfs_bmap_last_key: broken bmap (inode number=253710)
> 

I think that it makes sense to investigate dumps of the segments that
contains these blocks. Could you make dumps of #346754, #347335, #6917
segments and send only on my personal e-mail for analysis?

Example:

dd if=<device> of=<file> bs=4096 skip=710152192 count=2048

(710152192 == 346754 * 2048)

With the best regards,
Vyacheslav Dubeyko.

> I have not found new bad btree nodes in recent days. But the MyISAM tables still often be crashed and soon be ok without repairing.
> 
> 
> 在 2012-12-28，14:06，Vyacheslav Dubeyko <slava@dubeyko.com> 写道：
> 
> > Hi,
> > 
> > On Thu, 2012-12-27 at 17:47 +0800, Elmer Zhang wrote:
> >> Hi konishi ryusuke,
> >> 
> >> I am trying to use NILFS2 to make MySQL cold backup, but  the MySQL tables often be crashed. It seems there is some problems with nilfs filesystem.
> >> 
> > 
> > As I remember, you reported initially the error message about issue with
> > (inode number=321775) and (blocknr=710153406). If you have new MySQL
> > tables' crashes then it means that you have new NILFS error messages in
> > your syslog. Do you have error messages about new inode numbers and
> > block numbers or about the same?
> > 
> > With the best regards,
> > Vyacheslav Dubeyko.
> > 
> >> I have described how I use nilfs in this mail: http://www.mail-archive.com/linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg01481.html
> >> 
> >> Can I know which version of nilfs do you use, and what do you use nilfs for?
> >> 
> >> Thanks,
> >> Elmer Zhang--
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> > 
> 
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