[lustre-discuss] Lustre Size Variation after formatiing

Andreas Dilger adilger at whamcloud.com
Mon Aug 20 01:35:27 PDT 2018

On an ldiskfs MDT, by default 1/2 of all the space is consumed by inodes. That is fine (good even) because inodes is (or at least was) most of what the MDT stores. All of the file data is stored on the OSTs.

Cheers, Andreas

> On Aug 19, 2018, at 23:59, ANS <ans3456 at gmail.com> wrote:
> Dear Team,
> I am trying install lustre from the pre built RPMs and after installation i am facing LUN size huge variation.
> Please find my infra details as below:-
> 1) CentOS 7.4
> 2) Lustre version 2.11
> 3) MDT LUN Size is 6.5 TB (RAID 10) and after formatting using lustre we are getting the size as 3.9 TB, when formatted using XFS is showing accurate.
> Thanks,
> ANS.
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