Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes

From	<tomas@tuxteam.de>
Newsgroups	linux.debian.user
Subject	Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes
Date	2024-09-16 13:00 +0200
Message-ID	<JnhCx-cG22-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <JmdhD-bYSL-5@gated-at.bofh.it> <JmjQ5-c2Ol-27@gated-at.bofh.it> <JnfU5-cF2t-3@gated-at.bofh.it> <Jng3L-cF5n-1@gated-at.bofh.it> <JnhsR-cFYZ-1@gated-at.bofh.it>
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On Mon, Sep 16, 2024 at 01:40:52PM +0300, Anssi Saari wrote:
> <tomas@tuxteam.de> writes:

[...]

> > You are talking device cache. Jeffrey is talking file system cache.
> > Two different (and independent) layers.
> 
> I think Jeffrey's post was pretty clear in that it was not about writing
> to a file system. Notwithstanding the words "file system cache" in that
> quote above which I think that was just a mistake.

This way around it'd make sense. The quoted kernel messages:

> [3675744.043264] sd 6:0:0:0: [sdc] No Caching mode page found

and so on talk device cache, not FS cache. To avoid confusion, it is
important to keep them apart.

(Still, if you yank the device out while its caches are dirty, you might
get corruption, depending on how those react to power loss).

Cheers
-- 
t

Thread

Disk drive zero-fill benchmarks for various synchronization methods  and block sizes David Christensen <dpchrist@holgerdanske.com> - 2024-09-08 20:10 +0200
  Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-09 11:00 +0200
    Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes David Wright <deblis@lionunicorn.co.uk> - 2024-09-09 15:40 +0200
      Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-10 11:00 +0200
        Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-13 14:10 +0200
          Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes <tomas@tuxteam.de> - 2024-09-13 20:40 +0200
            Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes Michael Stone <mstone@debian.org> - 2024-09-16 04:50 +0200
              Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes <tomas@tuxteam.de> - 2024-09-16 06:40 +0200
          Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes Jeffrey Walton <noloader@gmail.com> - 2024-09-13 21:10 +0200
            Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes David Christensen <dpchrist@holgerdanske.com> - 2024-09-14 01:40 +0200
            Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-16 11:10 +0200
              Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes <tomas@tuxteam.de> - 2024-09-16 11:20 +0200
                Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-16 12:50 +0200
                Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes <tomas@tuxteam.de> - 2024-09-16 13:00 +0200
                Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes Michael Stone <mstone@debian.org> - 2024-09-16 13:20 +0200
          Re: Disk drive zero-fill benchmarks for various synchronization methods and  block sizes "Rick Thomas" <rick.thomas@pobox.com> - 2024-09-13 23:20 +0200
          Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes David Wright <deblis@lionunicorn.co.uk> - 2024-09-16 21:20 +0200
  Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes Michael Stone <mstone@debian.org> - 2024-09-16 05:00 +0200
    Re: Disk drive zero-fill benchmarks for various synchronization methods and block sizes Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2024-09-16 12:20 +0200
      Re: Disk drive zero-fill benchmarks for various synchronization  methods and block sizes Michael Stone <mstone@debian.org> - 2024-09-16 13:40 +0200

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