Hello, Warren.
Yes, we use properly filled file on a single splining drive. All tests
are done with fio, here is a link on full test report -
http://koder-ua.github.io/6.1GA/ephemeral_drive.html.
Here is a link on report for same test, executed directly on HDD, used
for ephemeral storage -
The only time we saw major performance issues with ephemeral (we're using
SSDs in RAID 0) was when we ran fio against a sparse file. It sounds like
you ran it against a properly filled file though, and it looks like you're
on a single spinning drive, based on the fio numbers. Can you confirm?
