From: Christoph Hellwig <hch@infradead.org>
To: Hao Chen <haochen@amazon.com>
Cc: "Lu, Qian" <luqia@amazon.com>,
"linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
"darrick.wong@oracle.com" <darrick.wong@oracle.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
amazon-linux-kernel <amazon-linux-kernel@amazon.com>
Subject: Re: XFS mounted with 'discard' option - deleting fio test files slow
Date: Sun, 10 Sep 2017 23:42:37 -0700 [thread overview]
Message-ID: <20170911064237.GA15161@infradead.org> (raw)
In-Reply-To: <20170908232152.GA44231@amazon.com>
On Fri, Sep 08, 2017 at 04:21:52PM -0700, Hao Chen wrote:
> This is expected. To get a better performance of XFS on NVMe drive, it
> is advised not use use the realtime discard option.
>
> https://www.intel.com/content/dam/support/us/en/documents/ssdc/data-center-ssds/Intel_Linux_NVMe_Guide_330602-002.pdf
Again, this will depend on your device. Intel in particular was the
example in my presentation for horrible performance of the NVMe
discard support - other vendors implement much better discard support,
so you'll see much better results.
prev parent reply other threads:[~2017-09-11 6:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-07 18:22 XFS mounted with 'discard' option - deleting fio test files slow Lu, Qian
2017-09-07 23:34 ` Dave Chinner
2017-09-08 7:16 ` Christoph Hellwig
2017-09-08 17:17 ` Lu, Qian
2017-09-08 23:21 ` Hao Chen
2017-09-11 6:42 ` Christoph Hellwig [this message]
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