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From: | Alberto Garcia |
Subject: | Re: [Qemu-devel] [PATCH 0/7] qcow2: Reduce the number of I/O ops when doing COW |
Date: | Fri, 26 May 2017 15:08:43 +0200 |
User-agent: | Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Fri 26 May 2017 02:47:55 PM CEST, Anton Nefedov wrote: > Tried the another machine; about 10% improvement here [...] > address@hidden ~]# fio --name=randwrite --blocksize=4k > --filename=/dev/sdb --rw=randwrite --direct=1 --ioengine=libaio > --size=2g --io_size=32m In my tests I sometimes detected slight performance decreases in that HDD scenario but using 'write' instead of 'randwrite' (and --runtime=60 instead of --io_size). Can you try and see how that works for you? Berto
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