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From: Joshua Boyd <boydjd@jbip.net>
Date: Tue, 10 Aug 2010 00:03:50 -0400
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To: Ivan Voras <ivoras@freebsd.org>
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Subject: Re: 8-STABLE Slow Write Speeds on ESXI 4.0
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On Mon, Aug 9, 2010 at 11:24 AM, Ivan Voras <ivoras@freebsd.org> wrote:

> On 9.8.2010 17:12, Ivan Voras wrote:
> > On 9 August 2010 16:55, Joshua Boyd <boydjd@jbip.net> wrote:
> >> On Sat, Aug 7, 2010 at 1:58 PM, Ivan Voras <ivoras@freebsd.org> wrote:
>
> >> I'm going to try 7.3-RELEASE today, just to make sure that this isn't a
> >> regression of some kind. It seems from reading other posts that this
> used to
> >> work properly and satisfactorily.
> >
> > Nope, I've been messing around with VMWare for a long time and the
> > performance penalty was always there.
>
> Hmmm, I've been thinking a little and after retesting one of my guests
> on a 12-drive RAID-6 HP FC enclosure, and your 40 MB/s writes actually
> do seam slow. I'm getting around 110 MB/s sequential reads and writes
> (untuned) and the guest controller is recognized as:
>
> mpt0: <LSILogic 1030 Ultra4 Adapter> port 0x1400-0x14ff mem
> 0xd8820000-0xd883ffff,0xd8800000-0xd881ffff irq 17 at device 16.0 on pci0
> mpt0: [ITHREAD]
> mpt0: MPI Version=1.2.0.0
>
> on 7.3-release, i386, ESXi 4.0.
>
> Are you sure you are testing when no others guests generate IO?
>

There was definitely IO, but nothing signicant. I'd have to schedule a
maintenance period to shut down all other guests, and the second ESXI box,
since they both use the same MD3000 as DAS.


>
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-- 
Joshua Boyd
JBipNet

E-mail: boydjd@jbip.net

http://www.jbip.net