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Re: Slow XFS write

From Martin LEUSCH <sce.tech@imereos.fr>
Newsgroups linux.debian.user
Subject Re: Slow XFS write
Date 2018-08-22 16:10 +0200
Message-ID <wpBZD-8va-1@gated-at.bofh.it> (permalink)
References <wpy5I-606-7@gated-at.bofh.it> <wpzl8-6TX-5@gated-at.bofh.it> <wpAqR-7up-9@gated-at.bofh.it> <wpBdf-7ZL-3@gated-at.bofh.it>
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Le 22/08/2018 à 15:17, Michael Stone a écrit :
> On Wed, Aug 22, 2018 at 02:25:51PM +0200, Martin LEUSCH wrote:
>> I tested write speed with dd command like "dd if=/dev/zero 
>> of=/var/srv/nfs/
>> testfile bs=1G count=1 oflag=direct".
>> The 10 MB/s for the data partition also correspond to the behavior I 
>> get in
>> real situation, when I copy a big file on NFS, 12GB are copied 
>> quickly then
>> hang for 15 or 20 minutes. When I copy big file with scp, It copy 
>> quickly the
>> at the beginning then decrease to 10 MB/s till the end.
>
> what happens with
> dd if=/dev/zero of=/var/srv/nfs/testfile bs=64k count=16k conv=fsync
>
> And this is direct on the server, not via NFS, right?
>
I've got same result as previous test.
tests with dd command are executed directly on the server.

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Thread

Slow XFS write Martin LEUSCH <sce.tech@imereos.fr> - 2018-08-22 12:00 +0200
  Re: Slow XFS write Michael Stone <mstone@debian.org> - 2018-08-22 13:20 +0200
    Re: Slow XFS write Martin LEUSCH <sce.tech@imereos.fr> - 2018-08-22 14:30 +0200
      Re: Slow XFS write Michael Stone <mstone@debian.org> - 2018-08-22 15:20 +0200
        Re: Slow XFS write Martin LEUSCH <sce.tech@imereos.fr> - 2018-08-22 16:10 +0200
          Re: Slow XFS write Michael Stone <mstone@debian.org> - 2018-08-22 18:00 +0200
            Re: Slow XFS write Michael Stone <mstone@debian.org> - 2018-08-22 18:00 +0200
  Re: Slow XFS write Martin LEUSCH <sce.tech@imereos.fr> - 2018-08-22 16:20 +0200
    Re: Slow XFS write Reco <recoverym4n@gmail.com> - 2018-08-22 19:40 +0200
  Re: Slow XFS write Stefan K <shadow_7@gmx.net> - 2018-08-23 09:10 +0200
    Re: Slow XFS write Martin LEUSCH <sce.tech@imereos.fr> - 2018-08-23 11:20 +0200

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