Date: Mon, 14 Jan 2013 00:05:54 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Nicolas Rachinsky" <fbsd-mas-0@ml.turing-complete.org> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: slowdown of zfs (tx->tx) Message-ID: <778BCD159C6546A4ADC7D9FBBFC3DA8A@multiplay.co.uk> References: <20130108174225.GA17260@mid.pc5.i.0x5.de> <CAFqOu6jgA8RWV5d%2BrOBk8D=3Vu3yWSnDkAi1cFJ0esj4OpBy2Q@mail.gmail.com> <20130109162613.GA34276@mid.pc5.i.0x5.de> <CAFqOu6jrng=v8eVyhqV-PBqJM_dYy%2BU7X4%2B=ahBeoxvK4mxcSA@mail.gmail.com> <20130110193949.GA10023@mid.pc5.i.0x5.de> <20130111111147.GA34160@mid.pc5.i.0x5.de> <C3BE7751389046ED8A03C8EA9699A76B@multiplay.co.uk> <20130113235239.GA16318@mid.pc5.i.0x5.de>
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----- Original Message -----
From: "Nicolas Rachinsky" <fbsd-mas-0@ml.turing-complete.org>
To: "Steven Hartland" <killing@multiplay.co.uk>
Cc: "freebsd-fs" <freebsd-fs@freebsd.org>
Sent: Sunday, January 13, 2013 11:52 PM
Subject: Re: slowdown of zfs (tx->tx)
>* Steven Hartland <killing@multiplay.co.uk> [2013-01-11 13:58 -0000]:
>> TBH looks like your just saturating your disks with the number of IOP's
>> your doing.
>
> But now a backup takes forever (16hours and more) that took less than
> 30 minutes two weeks ago.
>
> I duplicated the complete setup to another (slower) server. There the
> backups are slower than they were on this machine, but they are much
> faster than on this machine.
Its not something silly like you have 4k disks which aren't 4k aligned
is it?
IIRC you where using rsync, is there a reason why you aren't using
zfs send - recv?
Regards
Steve
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