[CentOS] Fwd: Bug 800181: NFSv4 on RHEL 6.3 over six times slower than 5.8

Tue Jul 10 22:58:20 UTC 2012
Gé Weijers <ge at weijers.org>

It may not be a bug, it may be that RHEL 6.x implements I/O barriers
correctly, which slows things down but keeps you from losing data....

On Tue, Jul 10, 2012 at 7:18 AM,  <m.roth at 5-cent.us> wrote:
> Thought I'd post this here, too - I emailed it to the redhat list, and
> that's pretty moribund, while I've seen redhatters here....
> ---------------------------- Original Message ----------------------------
> Subject: Bug 800181: NFSv4 on RHEL 6.2 over six times slower than 5.7
> From:    m.roth at 5-cent.us
> Date:    Tue, July 10, 2012 09:54
> To:      "General Red Hat Linux discussion list" <redhat-list at redhat.com>
> --------------------------------------------------------------------------
> m.roth at 5-cent.us wrote:
>> For any redhatters on the list, I'm going to be reopening this bug today.
>> I am also VERY unhappy with Redhat. I filed the bug months ago, and it was
>> *never* assigned - no one apparently even looked at it. It's a
>> show-stopper for us, since it hits us on our home directory servers.
>> A week or so ago, I updated our test system to 6.3, and *nothing* has
>> changed. Unpack a large file locally, and it's seconds. Unpack from an
>> NFS-mounted directory to a local disk takes about 1.5min. NFS mount either
>> an ext3 or ext4 fs, cd to that directory, and I run a job to unpack a
>> large file to the NFS-mounted directory, and it's between 6.5 and 7.5
>> *MINUTES*. We cannot move our home directory servers to 6.x with this
>> unacknowledged ->BUG<-.
>> Large file is defined as a 28M .gz file, unpacked to 92M.
>> This is 100% repeatable.
>> I tried sending an email to our support weeks ago, and got no response.
>> Maybe it takes shaming in a public forum to get anyone to acknowledge this
>> exists....
>           mark
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