Quota and reiserfs status

Quota and reiserfs status

[Fabien Salvi]

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Hello,

I've tried some tests with quota using reiserfs filesystems.
It works very well...

I have attached a very little documentation (2 ascii texts) about simple
configuration.
Hope it can help somebody.

I have one question :
Now, you must patch linux kernel to have quota with reiserfs enabled.

Is it provided to the near future, or maybe not before the next stable
release of lk ?

I've made some benchs and I have no problems.
But, can we considere quota support stable enough for production use ?

Thanks in advance for your help.

B.R.

-------------
Fabien SALVI      Centre de Ressources Informatiques
                  Archamps, France -- http://www.cri74.org
                  PingOO GNU/linux distribution : http://www.pingoo.org

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 QUOTA under linux with REISERFS Filesystem
 Fabien SALVI <fabien@cri74.org>
 7 June 2002


To have quota with reiserfs, you have to patch linux kernel

For example, with 2.4.18 kernel :


==> If you use the standard kernel, you won't be able to use quota with reiserfs !!


1) Get kernel source, for example file linux-2.4.18.tar.gz

2) Get patches from ftp://ftp.suse.com/pub/people/mason/patches/reiserfs/quota-2.4/2.4.18/

2) Untar the linux kernel source and gunzip the patches

3) Follow the README given with the patches and apply patches to the linux kernel
example :
cd path/to/linux
patch -p1 < path/to/patch-file

4) Configure your kernel with quota support

5) Recompile your kernel and boot on it

It *should* work :)

6) Get the last quota-tools on http://sourceforge.net/projects/linuxquota/
and compile/install it


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 QUOTA FOR LINUX FILESYSTEMS (tested with ext2 and reiserfs)
 Fabien SALVI <fabien@cri74.org>
 7 June 2002


Warning !
To have quota with reiserfs, you need to apply patches to the standard kernel, see howto_quota_with_reiserfs.txt


1) You must mount partitions with the right option, example in fstab:
/dev/sdb1 /var/www reiserfs rw,usrquota                 0       0
/dev/sdb2 /test ext2 defaults,usrquota                  0       2

2) If the partitions are already mounted without the quota option, you must umount and remount them (or reboot if it is not possible, ie devices busy...)


3) Run quotacheck command, example :

$ quotacheck -c  -avug
quotacheck: Scanning /dev/sdb1 [/var/www] done
quotacheck: Checked 3080 directories and 42649 files
quotacheck: Old file not found.
quotacheck: Scanning /dev/sdb2 [/test] done
quotacheck: Checked 3 directories and 1 files
quotacheck: Old file not found.

This will create quota files named "aquota.user" in /var/www and /test (the 2 partitions with quota option)

4) Activate quota with quotaon -a

5) use edquota to put quota on a user
For example :
$ equota fabien
And adjust values to your needs

6) Verify an user quota :
$ quota -v fabien
Disk quotas for user fabien (uid 1001): 
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
      /dev/sdb1       1   10000   20000               1       0       0        
      /dev/sdb2       8    5000   10000               2       0       0        

7) If you want an user to see its quota, change permissions of files aquota.user to 0644

Re: Quota and reiserfs status

[Valdis.Kletnieks]

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On Fri, 07 Jun 2002 15:43:28 +0200, Fabien Salvi <fabien@cri74.org>  said:

> Is it provided to the near future, or maybe not before the next stable
> release of lk ?
> 
> I've made some benchs and I have no problems.
> But, can we considere quota support stable enough for production use ?

It's quite stable - the problem is that if you install the quota patch
(or have a kernel that includes it), it requires a matching upgrade in
the user-space quota tools, and there's some resistance to doing that
mid-kernel-cycle.
-- 
				Valdis Kletnieks
				Computer Systems Senior Engineer
				Virginia Tech


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Re: Quota and reiserfs status

[Jan Kara]

  Hello,
  
> I've tried some tests with quota using reiserfs filesystems.
> It works very well...
> 
> I have attached a very little documentation (2 ascii texts) about simple
> configuration.
> Hope it can help somebody.
  The text is nice :)
  
> I have one question :
> Now, you must patch linux kernel to have quota with reiserfs enabled.
> 
> Is it provided to the near future, or maybe not before the next stable
> release of lk ?
  Currently VFS side of the patches is in 2.5 kernel and I
suppose Chris will commit Reiserfs part soon. I plan to backport patches
from 2.5 kernel to 2.4 (but it's not certain Marcello will agree with it
and I'm also not sure about Reiserfs part of the patches).

								Honza

Re: Quota and reiserfs status

[Chris Mason]

On Fri, 2002-06-07 at 12:20, Jan Kara wrote:
>   Hello,
>   
> > I've tried some tests with quota using reiserfs filesystems.
> > It works very well...
> > 
> > I have attached a very little documentation (2 ascii texts) about simple
> > configuration.
> > Hope it can help somebody.
>   The text is nice :)
>   
> > I have one question :
> > Now, you must patch linux kernel to have quota with reiserfs enabled.
> > 
> > Is it provided to the near future, or maybe not before the next stable
> > release of lk ?
>   Currently VFS side of the patches is in 2.5 kernel and I
> suppose Chris will commit Reiserfs part soon. I plan to backport patches
> from 2.5 kernel to 2.4 (but it's not certain Marcello will agree with it
> and I'm also not sure about Reiserfs part of the patches).

I think the 2.4 patches are stable enough that we can include them if
and when Jan's new quota code is included.

For 2.5.x, I want to put in the data logging code first (it is actually
based on pieces of the quota support).  This is non-trivial, but will
make the total time to merge both features easier.

-chris