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Re: [opensuse] [OT] is there a virtual machine that IMPROVE performance by using harddisk as harddisk image
- From: Zhang Weiwu <zhangweiwu@xxxxxxxxxx>
- Date: Tue, 02 Jun 2009 22:07:17 +0800
- Message-id: <4A253215.1000100@xxxxxxxxxx>
Lars Marowsky-Bree wrote:
As far as I know if the hard disk of the guest os is an image file on
the host OS, the host OS treats it as a file and offer to cache it in
the main memory. However if vmplayer access a partition or harddisk it
is not cached by the host OS's file system. That might make it even
slower. Unless of course the database is in particular on a raw device
that is directly accessed from the guest OS, as Sandy pointed out.
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On 2009-06-02T10:28:04, Zhang Weiwu <zhangweiwu@xxxxxxxxxx> wrote:I guess probably not the same efficient.
do people know a virtual machine software that can improve performance
by making use of a separate harddisk instead of a disk image?
Any and all can do that.
Just point it at using a device name instead of the file path.
Xen, KVM, VirtualBox, VMWare ...
They just use it for backing storage, and internally convert the file
based images to block devices anyway.
As far as I know if the hard disk of the guest os is an image file on
the host OS, the host OS treats it as a file and offer to cache it in
the main memory. However if vmplayer access a partition or harddisk it
is not cached by the host OS's file system. That might make it even
slower. Unless of course the database is in particular on a raw device
that is directly accessed from the guest OS, as Sandy pointed out.
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For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx
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