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Subject: [Bug 212681] I/O is slow for FreeBSD DOMu on XenServer
Date: Wed, 14 Sep 2016 16:42:48 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212681

--- Comment #6 from karl@pielorz.com ---
(In reply to rainer from comment #5)

Ok, so 'like for like' test see's better performance.

I'm not overly familiar with dc3dd - maybe it's using a "really small block
size" - and  on your setup, this is causing an issue (maybe look at the ssz=
 /
bufsz options)

Do you have any 'local storage' on XenServer (or can you create some) - i.e.
something you can map to a FreeBSD VM - and repeat both the dc3dd and dd te=
st
on - that is backed by a local SATA / SAS disk on XenServer (i.e. not going
through ScaleIO?)

-Karl

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