On 2014-07-04 15:26, Elliott, Robert (Server Storage) wrote:
-----Original Message-----
From: Jens Axboe [mailto:axboe@xxxxxxxxx]
Sent: Friday, 04 July, 2014 4:19 PM
To: Elliott, Robert (Server Storage); fio@xxxxxxxxxxxxxxx
Cc: dgilbert@xxxxxxxxxxxx
Subject: Re: lots of closes causing lots of invalidates while running
How big are the devices? Should only open/close once per reading it, but
if it's scsi_debug and they are small, then that might explain it. If
that's not the case, it's definitely a but and we'll need to look into it.
My original test was with 128 MiB.
Same result with 1 GiB.
Goes away with 2 GiB and 4 GiB.
The behavior should be the same, just a change in frequency.
--
Jens Axboe
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