[lustre-discuss] Lustre over ZFS - RAIDz 9+2

Indivar Nair indivar.nair at techterra.in
Mon Jun 28 11:39:44 PDT 2021

Hi ...,

I have a couple of questions on Lustre over ZFS.
I have been trying to find answers to these questions on the Internet
for quite some time now, but couldn't find any.

Here are the questions -

Why is it recommended that we create a zpool/OST with 9+2 RAIDz2
arrays instead of the usual 8+2 RAID6 type arrays that align with
Lustre's 1MB RPC properly?

If we used 4K AF drives, with ashift=12, what size chunks (per disk)
will a 9+2 RAIDz2 array with 1MB record size create?



Indivar Nair

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