[Beowulf] Lustre Upgrades

[Joe Landman]

On 07/24/2018 10:31 AM, John Hearns via Beowulf wrote:
> Forgive me for saying this, but the philosophy for software defined 
> storage such as CEPH and Gluster is that forklift style upgrades 
> should not be necessary.
> When a storage server is to be retired the data is copied onto the new 
> server then the old one taken out of service. Well, copied is not the 
> correct word, as there are erasure-coded copies of the data. 
> Rebalanced is probaby a better word.

This ^^

I'd seen/helped build/benchmarked some very nice/fast CephFS based 
storage systems in $dayjob-1.  While it is a neat system, if you are 
focused on availability, scalability, and performance, its pretty hard 
to beat BeeGFS.  We'd ($dayjob-1) deployed several very large/fast file 
systems with it on our spinning rust, SSD, and NVMe units.


-- 
Joe Landman
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