[lustre-discuss] 1 MDS and 1 OSS

[Dilger, Andreas]

On Oct 31, 2017, at 07:35, Andrew Elwell <andrew.elwell at gmail.com> wrote:
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> On 31 Oct. 2017 07:20, "Dilger, Andreas" <andreas.dilger at intel.com> wrote:
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>> Having a larger MDT isn't bad if you plan future expansion.  That said, you would get better performance over FDR if you used SSDs for the MDT rather than HDDs (if you aren't already planning this), and for a single OSS you probably don't need the extra MDT capacity.  With both ldiskfs+LVM and ZFS you can also expand the MDT size in the future if you need more capacity.
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> Can someone with wiki editing rights summarise the advantages of different hardware combinations? For example I remember Daniel @ NCI had some nice comments about which components (MDS v OSS) benefited from faster cores over thread count and where more RAM was important.
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> I feel this would be useful for people building small test systems and comparing vendor responses for large tenders.

Everyone has wiki editing rights, you just need to register...

Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Intel Corporation