[lustre-discuss] Data stored in OST

[Nick dan]

Hi

Thank you for your reply

Yes, the OSTs must provide internal redundancy - RAID-6 typically
Can RAID_6 be replaced with mirror/RAID0?

Which type of RAID is recommended for MDT and OST?

Also can you brief on how data will be read/written in Lustre with ZFS is
used as backend filesystem in Lustre FS?

Thanks and regards
Nick



On Mon, 22 May 2023 at 13:36, Andreas Dilger <adilger at whamcloud.com> wrote:

> Yes, the OSTs must provide internal redundancy - RAID-6 typically.
>
> There is File Level Redundancy (FLR = mirroring) possible in Lustre file
> layouts, but it is "unmanaged", so users or other system-level tools are
> required to resync FLR files if they are written after mirroring.
>
> Cheers, Andreas
>
> > On May 22, 2023, at 09:39, Nick dan via lustre-discuss <
> lustre-discuss at lists.lustre.org> wrote:
> >
> > 
> > Hi
> >
> > I had one doubt.
> > In lustre, data is divided into stripes and stored in multiple OSTs. So
> each OST will have some part of data.
> > My question is if one OST fails, will there be data loss?
> >
> > Please advise for the same.
> >
> > Thanks and regards
> > Nick
> > _______________________________________________
> > lustre-discuss mailing list
> > lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
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