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Date: Thu, 08 Jul 2010 17:59:48 +1000
From: Andrew Snow <andrew@modulus.org>
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To: Simun Mikecin <numisemis@yahoo.com>, freebsd-fs@freebsd.org
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Subject: Re: Freebsd 8 Release /usr Die After host VMWARE Crash
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On 08/07/10 17:45, Simun Mikecin wrote:
> AFAIK virtual environments ignore disk sync requests by default. For example, in
> VirtualBox they are ignored by default, by you could enable it if you want (with
> a performance penalty). Haven't used VMWare, so not 100% sure about it, maybe
> someone more knowledgable with VMWare knows what it's defaults are.

VMware vSphere/ESX/ESXi makes all writes synchronous.

(It is terribly slow on RAID cards that lack battery-backed cache!)


- Andrew