From: Eric Sandeen <sandeen@sandeen.net>
To: xfs@oss.sgi.com
Subject: Re: about the xfs performance
Date: Mon, 11 Apr 2016 14:33:10 -0500 [thread overview]
Message-ID: <570BFBF6.8020403@sandeen.net> (raw)
In-Reply-To: <20160411181001.2760439b@harpe.intellique.com>
On 4/11/16 11:10 AM, Emmanuel Florac wrote:
> Le Mon, 11 Apr 2016 22:14:06 +0800
> Songbo Wang <hack.coo@gmail.com> écrivait:
>
>> mkfs: mkfs.xfs /dev/hioa2 -f -n size=64k -i size=512 -d
>> agcount=40 -l size=1024m.
>> mount: mount /dev/hioa2 /mnt/ -t xfs -o
>> rw,noexec,nodev,noatime,nodiratime,nobarrier,discard,inode64,logbsize=256k,delaylog
>> I use the following command to test iops: fio -ioengine=libaio -bs=4k
>> -direct=1 -thread -rw=randwrite -size=50G -filename=/mnt/test
>> -name="EBS 4KB randwrite test" -iodepth=64 -runtime=60
>> The results is normal at the beginning which is about 210k±，but some
>> seconds later, the results down to 19k±.
>
> You should first try default mkfs settings, with default mount options.
Agreed. Where did that set of options come from, in any case?
-Eric
> Normally mkfs.xfs should initiate a TRIM on the SSD, therefore
> performance should remain predictable.
>
> What model of SSD card are you using? With an HGST NVMe SN1x0 I've got
> very consistent results (no degradation with time).
>
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next prev parent reply other threads:[~2016-04-11 19:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-11 14:14 about the xfs performance Songbo Wang
2016-04-11 16:10 ` Emmanuel Florac
2016-04-11 19:33 ` Eric Sandeen [this message]
2016-04-12 13:27 ` Songbo Wang
2016-04-11 23:10 ` Dave Chinner
2016-04-12 14:07 ` Songbo Wang
2016-04-12 21:31 ` Dave Chinner
2016-04-13 17:27 ` Songbo Wang
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