[lustre-discuss] Errors large directory feature ldiskfs

[Artem Blagodarenko]

Hello Fernando,

The option is enabled by command:

tune2fs -O large_dir <ldiskfs_partition>

BUT, this feature is still in testing, so I do not suggest  use it in production.
Also, current Lustre FS e2fsprogs don’t support this feature. Now it available only for EXT4 since E2fsprogs 1.44.0 (March 7, 2018) and linux 4.13.
I hope this feature will be enabled in WC e2fsprogs which will be released with Lustre FS 2.12.

Best regards,
Artem Blagodarenko.

> On 4 Oct 2018, at 12:28, Fernando Perez <fperez at icm.csic.es> wrote:
> 
> Sorry, we have lustre 2.10.4 release installed in our lustre filesystem, migrated previously from 2.4 to 2.8 and 2.10.4
> 
> Regards.
> 
> =============================================
> Fernando Pérez
> Institut de Ciències del Mar (CSIC)
> Departament Oceanografía Física i Tecnològica
> Passeig Marítim de la Barceloneta,37-49
> 08003 Barcelona
> Phone:  (+34) 93 230 96 35
> =============================================
> 
> On 10/04/2018 11:16 AM, Fernando Perez wrote:
>> Dear all.
>> 
>> We have a lustre system with combined mds + mdt ldiskfs and several osts with zfs and ldiskfs.
>> 
>> I have these errors in our mds server log:
>> 
>> LDISKFS-fs warning (device dm-4): ldiskfs_dx_add_entry:2618: inode 30544460: comm mdt01_047: index 2: reach max htree level 2
>> Oct  4 09:32:24 nemo kernel: LDISKFS-fs warning (device dm-4): ldiskfs_dx_add_entry:2622: Large directory feature is not enabled on this filesystem
>> Oct  4 09:32:24 nemo kernel: Lustre: 25646:0:(osd_handler.c:466:osd_ldiskfs_add_entry()) lustre-MDT0000: directory (inode: 30544460, FID: [0x200002347:0x1:0x0]) has reached maximum entry limit
>> 
>> How can I enable the large directory feature in our lustre filesystem to solve these errors?
>> 
>> I can't see references to this feature in the lustre documentation. Is it related with the LU-1365?
>> 
>> Regards.
>> 
> 
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