[lustre-discuss] Mixing ZFS and LDISKFS

[Backer]

Sounds good. Thank you!

On Fri, 12 Jan 2024 at 19:28, Andreas Dilger <adilger at whamcloud.com> wrote:

> All of the OSTs and MDTs are "independently managed" (have their own
> connection state between each client and target) so this should be
> possible, though I don't know of sites that are doing this.  Possibly this
> makes sense to put NVMe flash OSTs on ldiskfs, and HDD OSTs on ZFS, and
> then put them in OST pools so that they are managed separately.
>
> On Jan 12, 2024, at 10:38, Backer <backer.kolo at gmail.com> wrote:
>
> Thank you Andreas! How about mixing OSTs?  The requirement is to do RAID
> with small volumes using ZFS and have a large OST. This is to reduce the
> number of OSTs overall as the cluster being extended.
>
> On Fri, 12 Jan 2024 at 11:26, Andreas Dilger <adilger at whamcloud.com>
> wrote:
>
>> Yes, some systems use ldiskfs for the MDT (for performance) and ZFS for
>> the OSTs (for low-cost RAID).  The IOPS performance of ZFS is low vs.
>> ldiskfs, but the streaming bandwidth is fine.
>>
>> Cheers, Andreas
>>
>> > On Jan 12, 2024, at 08:40, Backer via lustre-discuss <
>> lustre-discuss at lists.lustre.org> wrote:
>> >
>> > 
>> > Hi,
>> >
>> > Could we mix ZFS and LDISKFS together in a cluster?
>> >
>> > Thank you,
>> >
>> >
>> > _______________________________________________
>> > lustre-discuss mailing list
>> > lustre-discuss at lists.lustre.org
>> > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Lustre Principal Architect
> Whamcloud
>
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