[ceph-users] Re: Strange hardware behavior

4 Sep 2019


      Still, please don't :)

At least drop_caches before testing.
...
Hi!
In this case, using dd is quite acceptable.
----- Original Message -----
...
From: vitalif@yourcmc.ru
To: "Fyodor Ustinov" <ufm@ufm.su>
Cc: "EDH - Manuel Rios Fernandez" <mriosfer@easydatahost.com>,  
"ceph-users" <ceph-users@ceph.io>
Sent: Tuesday, 3 September, 2019 15:18:23
Subject: Re: [ceph-users] Re: Strange hardware behavior
...
Please never use dd for disk benchmarks.
Use fio. For linear write:
fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M
-iodepth=32 -rw=write -runtime=60 -filename=/dev/sdX
-- 
With best regards,
   Vitaliy Filippov