[lustre-discuss] help ldev.conf usage clarification

[Cameron Harr]

We only use ZFS, but we have one file with all MGS/MDTs/OSTs in it, 
replicated across all Lustre server nodes. Note the 2nd column is for a 
failover peer, which you hopefully have.


On 09/12/2018 03:11 PM, Riccardo Veraldi wrote:
> Hello,
>
> I wanted to ask some clarifiaction on ldev.conf usage and features.
>
> I am using ldev.conf only on my ZFS lustre OSSes and MDS.
>
> Anyway I hae a doubt on what should go in that file.
>
> I have seen people having only the metadata configuration in it like 
> for example:
>
> mds01 - mgs zfs:lustre01-mgs/mgs
> mds01 - mdt0 zfs:lustre01-mdt0/mdt0
>
> and people filling hte file with both mgs settings and listing also 
> all the OSSes/OSTs then spreading the same ldev.conf file over all the 
> OSSes like in this example with
>
> 3 OSSes where each one has one OST:
>
>
> mds01 - mgs zfs:lustre01-mgs/mgs
> mds01 - mdt0 zfs:lustre01-mdt0/mdt0
> #
> drp-tst-ffb01 - OST01 zfs:lustre01-ost01/ost01
> drp-tst-ffb02 - OST02 zfs:lustre01-ost02/ost02
> drp-tst-ffb03 - OST03 zfs:lustre01-ost03/ost03
>
> is this correct or only the metadata information should stay in 
> ldev.conf ?
>
> Also can ldev.conf be used with ldiskfs based cluster ? On ldiskfs 
> based clsuters I usually mount the metadata partition and OSS 
> partitions in fstab and my ldev.conf is empty.
>
> thanks
>
> Rick
>
>
>
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