Re: XFS mounted with 'discard' option - deleting fio test files slow

From	Christoph Hellwig <hch@infradead.org>
Newsgroups	linux.kernel
Subject	Re: XFS mounted with 'discard' option - deleting fio test files slow
Date	2017-09-11 08:50 +0200
Message-ID	<uoqHD-7zH-9@gated-at.bofh.it> (permalink)
References	<un9IS-3K0-17@gated-at.bofh.it> <unv6G-1yj-5@gated-at.bofh.it> <unASJ-5pn-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

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.

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

XFS mounted with 'discard' option - deleting fio test files slow "Lu, Qian" <luqia@amazon.com> - 2017-09-07 20:30 +0200
  Re: XFS mounted with 'discard' option - deleting fio test files slow Dave Chinner <david@fromorbit.com> - 2017-09-08 01:40 +0200
    Re: XFS mounted with 'discard' option - deleting fio test files slow Christoph Hellwig <hch@infradead.org> - 2017-09-08 09:20 +0200
  Re: XFS mounted with 'discard' option - deleting fio test files slow "Lu, Qian" <luqia@amazon.com> - 2017-09-08 19:20 +0200
    Re: XFS mounted with 'discard' option - deleting fio test files slow Hao Chen <haochen@amazon.com> - 2017-09-09 01:30 +0200
      Re: XFS mounted with 'discard' option - deleting fio test files slow Christoph Hellwig <hch@infradead.org> - 2017-09-11 08:50 +0200

csiph-web