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Re: Correct usage of inode64/running out of inodes

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: Correct usage of inode64/running out of inodes
From: Adam Donald <Adam.Donald@xxxxxxxxxxxxxxx>
Date: Mon, 29 Jun 2009 15:35:41 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <4A491887.8050509@xxxxxxxxxxx>
References: <OF97A83ACB.604AE440-ON862575E4.00450F9F-862575E4.00475C94@xxxxxxxxx> <4A491887.8050509@xxxxxxxxxxx>

From: Eric Sandeen <sandeen@xxxxxxxxxxx>
To: Adam Donald <Adam.Donald@xxxxxxxxxxxxxxx>
Cc: xfs@xxxxxxxxxxx
Date: 06/29/2009 02:39 PM
Subject: Re: Correct usage of inode64/running out of inodes

Adam Donald wrote:
> Hello
> In short, I believe that I have used the indode64 option correctly in
> mounting my XFS device on my Centos 5.2 system, however, I seem to only
> have 59 free inodes available and 7.5TB of free space.  I would
> appreciate any insight as to what the best approach would be to fix this
> situation.  In case it is helpful, I have included output from various
> commands/files below, the XFS device in question is
> /dev/mapper/VolGroup01-DATA01.  Thank you in advance for your assistance!

It all looks sane to me; what are the actual symptoms of the problem
You can create 59 files and then -ENOSPC?  Any kernel messages?

Maybe this is a bug in the old xfs code in the centos module... though I
don't remember such a bug right now.s


> uname:
> Linux NAS01 2.6.18-92.1.6.el5 #1 SMP Wed Jun 25 13:45:47 EDT 2008 x86_64
> x86_64 x86_64 GNU/Linux
> df -h:
> Filesystem                            Size  Used Avail Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00        71G   12G   55G  18% /
> /dev/sda1                              99M   25M   70M  26% /boot
> tmpfs                                 3.9G     0  3.9G   0% /dev/shm
> /dev/mapper/VolGroup01-DATA01          18T  9.9T  7.5T  57% /DATA01
> df -ih:
> Filesystem                          Inodes   IUsed   IFree IUse% Mounted on
> /dev/mapper/VolGroup00-LogVol00        19M    123K     19M    1% /
> /dev/sda1                              26K      44     26K    1% /boot
> tmpfs                                 999K       1    999K    1% /dev/shm
> /dev/mapper/VolGroup01-DATA01          18G    297K     18G    1% /DATA01
> mount:
> ...
> /dev/mapper/VolGroup01-DATA01 on /DATA01 type xfs (rw,inode64)
> ...
> fstab:
> ...
> /dev/VolGroup01/DATA01  /DATA01                 xfs    
> rw,suid,dev,exec,auto,nouser,async,inode64      1 0
> ...

Thank you for your response.  To be honest, I only ran out of "space" (inodes) once on this volume a month or so ago, and I recall receiving a ENOSPC type error at that time.  At the time I received out of space errors I found the xfs_db command and have since started to monitor the ifree value, deleting files when I felt that ifree was dipping too low, as I was unable to apply the inode64 option without first taking down various production systems.  When the time came this past weekend to apply the inode64 option, I was expecting the ifree option value to shoot up dramatically (several hundred, perhaps), and instead the ifree value remained unaffected, the same as mounting the volume without the inode64 option.  

Given the fact that I have this volume mounted with the inode64 option, have roughly 7.5TB free, and show ifree with a double digit number (currently 30 on our system), is there a an inconsistency between the total amount of free space available and the number of free inodes available?

Thanks again for the input, I appreciate it!


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