[gpfsug-discuss] Online data migration tool

[valdis.kletnieks at vt.edu]

On Thu, 21 Dec 2017 16:38:27 +0000, Sven Oehme said:

> size. so if you now go to a 16MB blocksize and you have just 50 iops @ 2MB
> each you can write ~800 MB/sec with the exact same setup and same size
> small writes, that's a factor of 8 .

That's assuming your metadata storage is able to handle open/read/write/close
on enough small files per second to push 800MB/sec.  If you're talking 128K subblocks,
you're going to need some 6,400 small files per second to fill that pipe...
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