[lustre-discuss] inodes not adding up
Colin Faber
cfaber at gmail.com
Sat Apr 13 06:41:16 PDT 2019
Likely you're seeing the discrepancy as a result of precreated objects.
Cheers
On Sat, Apr 13, 2019, 2:58 AM Youssef Eldakar <youssefeldakar at gmail.com>
wrote:
> For one Lustre filesystem, inode count in the summary is notably less than
> what the individual OST inode counts would add up to:
>
> # lfs df -i /lfs01
> UUID Inodes IUsed IFree IUse% Mounted on
> lustrefs-MDT0000_UUID 2402287616 46560885 2355726731 2%
> /share/lfs01[MDT:0]
> lustrefs-OST0001_UUID 24117248 22883788 1233460 95%
> /share/lfs01[OST:1]
> lustrefs-OST0003_UUID 24117248 22903308 1213940 95%
> /share/lfs01[OST:3]
> lustrefs-OST0004_UUID 24117248 22895442 1221806 95%
> /share/lfs01[OST:4]
> lustrefs-OST0006_UUID 24117248 22890201 1227047 95%
> /share/lfs01[OST:6]
>
> filesystem_summary: 51457138 46560885 4896253 90% /share/lfs01
>
> On another filesystem, this is not the case:
>
> # lfs df -i /lfs02
> UUID Inodes IUsed IFree IUse% Mounted on
> lustrefs-MDT0000_UUID 1288503296 19222318 1269280978 1%
> /share/lfs02[MDT:0]
> lustrefs-OST0001_UUID 24117248 5942156 18175092 25%
> /share/lfs02[OST:1]
> lustrefs-OST0002_UUID 24117248 5816469 18300779 24%
> /share/lfs02[OST:2]
> lustrefs-OST0003_UUID 24117248 5982962 18134286 25%
> /share/lfs02[OST:3]
>
> filesystem_summary: 73832475 19222318 54610157 26% /share/lfs02
>
> In fact, in the latter case, the whole is slightly greater than the sum of
> its parts.
>
> Any pointers regarding where I would look for an explanation would be
> appreciated.
>
> Youssef Eldakar
> Bibliotheca Alexandrina
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> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
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