[lustre-discuss] Lustre Size Variation after formatiing

Mannthey, Keith keith.mannthey at intel.com
Mon Aug 20 14:55:23 PDT 2018

MDT with ldiskfs has a large amount of it total space pre-allocated for inodes.  Standard tools don’t see this as “free space” and is very normal for free space to seem odd.

I would suggest you track free inodes on an Ldiskfs MDT as it is more meaningful metric for most users.


From: lustre-discuss [mailto:lustre-discuss-bounces at lists.lustre.org]
Sent: Monday, August 20, 2018 2:46 PM
To: lustre-discuss at lists.lustre.org
Subject: Re: [lustre-discuss] Lustre Size Variation after formatiing

Could you share the command line used to do the actual formatting?

Brian Andrus

On 8/19/2018 11:58 PM, ANS 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.



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