[Lustre-discuss] [wc-discuss] Bad reporting inodes free

Fri Sep 28 00:03:37 PDT 2012

If I am need more inodes in my OST, I have a big trouble!, becouse I 
will need format all OST in my production storage environment.

Any ideas to increase the inodes number in my OST without formating?

Thanks!!!

On 27/09/12 14:26, Enrico Tagliavini wrote:
> Disclaimer: I'm not 100% sure if this guess is correct, so please 
> correct me if I'm wrong :).
>
> The amount of available inodes is not limited only by the MDT size. 
> You datas is physically on OSTs on ldiskfs, so an ext3/4 mod. ldiskfs 
> has inodes limits as a normal ext4. It is true that you can't create 
> more inodes then the MDT limit, but at the same time OSTs can full 
> their inodes too even if the MDT is far from full. In other words you 
> have two limiting factors for inodes: the total number of inode 
> supported by your MDT(s), and the sum of the OSTs.
>
> The solution is to add more OSTs or to format them with more inodes. I 
> have no idea if you can change it without formatting them. If I recall 
> correctly in ext4 is not possible.
>
> Regards
> Enrico
>
> On Thu, Sep 27, 2012 at 2:17 PM, Alfonso Pardo 
> <alfonso.pardo at ciemat.es <mailto:alfonso.pardo at ciemat.es>> wrote:
>
>     Hello,
>
>     When I run a "df -i" in my clients I get 95% indes used or 5%
>     inodes free:
>
>     Filesystem                                          Inodes      
>     IUsed       IFree         IUse% Mounted on
>     lustre-mds-01:lustre-mds-02:/cetafs 22200087 20949839 1250248  
>     95%    /mnt/data
>
>
>
>     But if I run lfs df -i i get:
>
>     UUID                                 Inodes        
>     IUsed            IFree I          Use%    Mounted on
>     cetafs-MDT0000_UUID    975470592   20949223    954521369   2%
>     /mnt/data[MDT:0]
>     cetafs-OST0000_UUID     19073280    17822213     1251067  93%
>     /mnt/data[OST:0]
>     cetafs-OST0001_UUID     19073280    17822532     1250748  93%
>     /mnt/data[OST:1]
>     cetafs-OST0002_UUID     19073280    17822560     1250720  93%
>     /mnt/data[OST:2]
>     cetafs-OST0003_UUID     19073280    17822622     1250658  93%
>     /mnt/data[OST:3]
>     cetafs-OST0004_UUID     19073280    17822181     1251099  93%
>     /mnt/data[OST:4]
>     cetafs-OST0005_UUID     19073280    17822769     1250511  93%
>     /mnt/data[OST:5]
>     cetafs-OST0006_UUID     19073280    17822378     1250902  93%
>     /mnt/data[OST:6]
>     cetafs-OST0007_UUID     19073280    17822131     1251149  93%
>     /mnt/data[OST:7]
>     cetafs-OST0008_UUID     19073280    17822419     1250861  93%
>     /mnt/data[OST:8]
>     cetafs-OST0009_UUID     19073280    17822151     1251129  93%
>     /mnt/data[OST:9]
>     cetafs-OST000a_UUID     19073280    17822894     1250386  93%
>     /mnt/data[OST:10]
>     cetafs-OST000b_UUID     19073280    17822328     1250952  93%
>     /mnt/data[OST:11]
>     cetafs-OST000c_UUID     19073280    17822388     1250892  93%
>     /mnt/data[OST:12]
>     cetafs-OST000d_UUID     19073280    17822336     1250944  93%
>     /mnt/data[OST:13]
>     cetafs-OST000e_UUID     19073280    17822139     1251141  93%
>     /mnt/data[OST:14]
>     cetafs-OST000f_UUID     19073280    17823451     1249829  93%
>     /mnt/data[OST:15]
>     cetafs-OST0010_UUID     19073280    17822354     1250926  93%
>     /mnt/data[OST:16]
>     cetafs-OST0011_UUID     19073280    17822676     1250604  93%
>     /mnt/data[OST:17]
>
>     filesystem summary:    975470592    20949223   954521369   2%
>     /mnt/data
>
>     I have a 2Tb for MDT wich only 87Gb used.
>
>
>     Any suggestion?
>
>     -- 
>
>     /Alfonso Pardo Díaz
>     *Researcher / System Administrator at CETA-Ciemat*
>     c/ Sola nº 1; 10200 Trujillo, ESPAÑA
>     Tel: +34 927 65 93 17 Fax: +34 927 32 32 37
>     CETA-Ciemat logo <http://www.ceta-ciemat.es/>/
>
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-- 

/Alfonso Pardo Díaz
*Researcher / System Administrator at CETA-Ciemat*
c/ Sola nº 1; 10200 Trujillo, ESPAÑA
Tel: +34 927 65 93 17 Fax: +34 927 32 32 37
CETA-Ciemat logo <http://www.ceta-ciemat.es/>/

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