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Date:      Wed, 9 Nov 2011 16:58:11 +1030
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        Kurt Touet <ktouet@gmail.com>
Cc:        freebsd-current@freebsd.org, Dan The Man <dan@sunsaturn.com>
Subject:   Re: samba+zfs
Message-ID:  <F8AEDB62-4C76-4D95-8CBA-6C58B54C1965@gsoft.com.au>
In-Reply-To: <B4FEAF5B-52AC-40E5-90A3-7BD060BB7A73@gsoft.com.au>
References:  <alpine.BSF.2.00.1110272039500.50739@sunsaturn.com> <CAGH67wRZZx0hG9ug2k-5ohCOPJ9sZOU9iFVKg7hv9WM=R761GA@mail.gmail.com> <alpine.BSF.2.00.1111080259270.89703@sunsaturn.com> <alpine.BSF.2.00.1111080328010.89703@sunsaturn.com> <CALM%2B6aJkF=CFq8LA3FrSMYo8La-8txK4h2p4yZtdHshskBU6Vw@mail.gmail.com> <alpine.BSF.2.00.1111082015260.93923@sunsaturn.com> <CALM%2B6aJiM%2BNfikax9vNiYzBJqo3B8WLEXiZgrjUUQa9ngCQaKg@mail.gmail.com> <B4FEAF5B-52AC-40E5-90A3-7BD060BB7A73@gsoft.com.au>

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On 09/11/2011, at 16:56, Daniel O'Connor wrote:
> On 09/11/2011, at 16:29, Kurt Touet wrote:
>> Is anyone else seeing problems like this with samba/zfs ?    Perhaps
>> it's not exclusive to samba, either?
>=20
> Yep, I see this too.
>=20
> I can get 80-100Mbyte/sec reads out of a single disk but ZFS is (now) =
very slow - it reads & writes and much more slowly (10-30MB/sec).
>=20
> When the array was fresh it was nice and fast - it is now 68% full and =
hasn't been much more full than that (I don't know but am pretty sure it =
never reach past 75%).
>=20
> The frustrating thing is trying to find some way of measuring what's =
actually going on.. I haven't had much luck :


Note that this is not restricted to Samba and while the server is not =
completely idle it's not doing very much.

dd's of large files (spooled backups going to tape) to /dev/null are as =
slow as Samba.

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C









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