[lustre-discuss] different quota counts between different Lustre versions?

[Thomas Roth]

Ah yes, the 0.7-OSS indeed show
> feature at userobj_accounting     active
That might be it.

Thanks,
Thomas


On 09/13/2018 05:01 PM, Cameron Harr wrote:
> Thomas,
> 
> ZFS 0.7+ (I think) has built-in object accounting that is more accurate than Lustre's guess. If you do
> a 'zpool get all | grep userobj_accounting' you can see if it's enabled and active (two separate
> states I found out just yesterday). In my testing, I upgraded from a ZFS 0.6 zpool (where Lustre
> quotas were definitely showing wrong) to ZFS 0.7 and noticed the accounting didn't immediately change.
> After stopping Lustre, exporting/importing the pools again, then things showed correctly and the
> userobj_accounting went from "enabled" to "active".
> 
> Cameron
> 
> 
> On 09/13/2018 05:33 AM, Thomas Roth wrote:
>> Hi all,
>>
>> we have one Lustre 2.5.3 with ZFS 0.6.3,  and another one with Lustre 2.10.3 and ZFS 0.7.6
>> I have copied a number of directories from old to new, and noticed that the number of inodes given by
>> 'lfs quota' differ.
>>
>> Extreme example is a user with just one file:
>>
>> # lfs quota -h -u USER /lustre/old
>>
>> Disk quotas for usr USER:
>>       Filesystem    used   quota   limit   grace   files   quota   limit   grace
>>      /lustre/old    133k      0k      0k       -       1       0       0       -
>>
>>
>> # lfs quota -h -u USER /lustre/new
>>
>> Disk quotas for usr USER:
>>       Filesystem    used   quota   limit   grace   files   quota   limit   grace
>>     /lustre/new      60k      0k      0k       -       2       0       0       -
>>
>>
>>
>> (Size difference is easy: it is a text file, and only the OSS in the 'new' FS have compression
>> enabled.)
>>
>>
>> I suppose some counting scheme has changed between those Lustre versions?
>>
>> However, some copied directories have much larger count-differences, but some have identical numbers.
>>
>>
>> Cheers,
>> Thomas
>>
> 
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