[lustre-discuss] limit on number of oss/ost's?

[Michael Di Domenico]

Is there a limit on the number of oss servers you can have in a single
filesystem?  is there one for ost's?

I'm curious of the performance implications between two different
configurations (this is just theory mind you)...

1000 oss with 1 ost each
vs
100 oss with 10 ost each

one could scale this up further 2000, 5000, 10000 oss's with 1 single ost each

i did note two references one from 2012 by Oleg Drokin that tested
1300 OST's at ornl which "mostly worked" and a note from Andreas last
year that quoted 2000 OST's before scaling issues.

I'm curious if there's a fundamental issue with scaling lustre, which
might be based on the presumption that oss's are typically fatter
nodes (getting fatter everyday) rather than large quantities of skinny
nodes

I'm also curious if there is still a 160 OST limit for file striping as well.