- Original Message -
> From: "Alberto Garcia"
> To: "qemu-discuss"
> Sent: Wednesday, September 25, 2019 8:05:50 AM
> Subject: Re: Large qcow2 performance
> On Tue, Sep 24, 2019 at 02:45:10PM -0500, Andrew Martin wrote:
>> Hi Berto,
>>
&
- Original Message -
> From: "Alberto Garcia"
> To: "qemu-discuss"
> Sent: Tuesday, September 24, 2019 10:15:56 AM
> Subject: Re: Large qcow2 performance
> On Mon, Sep 23, 2019 at 03:17:39PM -0500, Andrew Martin wrote:
>
>> I am considering
Hello,
I am considering creating a VM with a large qcow2, around 6TB in size. This
Linux VM will be reading and writing a lot of small files to this very large
qcow2 using the VirtIO driver. Are there any concerns or guidance about creating
such a large qcow2, or performance issues with small fil
- Original Message -
> From: "Narcis Garcia"
> To: qemu-discuss@nongnu.org
> Sent: Thursday, August 18, 2016 1:10:12 AM
> Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk
> Write Cache
>
> Sure.
>
>
> El 17/08
- Original Message -
> From: "Narcis Garcia"
> To: qemu-discuss@nongnu.org
> Sent: Wednesday, August 17, 2016 1:16:19 PM
> Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk
> Write Cache
>
> In the host:
> $ sysctl -n vm.dirty_expire_centisecs
> $ sysctl -n vm.
- Original Message -
> From: "Jakob Bohm"
> To: "Andrew Martin"
> Cc: qemu-discuss@nongnu.org
> Sent: Wednesday, August 17, 2016 10:32:39 AM
> Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk
> Write Cache
>
&
- Original Message -
> From: "Jakob Bohm"
> To: qemu-discuss@nongnu.org
> Sent: Wednesday, August 17, 2016 9:34:32 AM
> Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk
> Write Cache
>
> On 17/08/2016 15:21, Andrew Mart
- Original Message -
> From: "Fam Zheng"
> To: "Andrew Martin"
> Cc: qemu-discuss@nongnu.org
> Sent: Wednesday, August 17, 2016 2:50:36 AM
> Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk
> Write Cache
>
&
Hello,
I am running QEMU 2.5 on Ubuntu 16.04. My guests are a mixture of Linux (Ubuntu
12.04 and newer with ext4) and Windows. The guest qcow2 images are stored in a
ZFS filesystem with sync=standard (on top of a mirrored vdev of SSDs) on the
host
Ubuntu 16.04 OS. After having read through docum
Hello,
I am running QEMU 2.0.0 and libvirt 1.2.2 on Ubuntu 14.04 LTS. My KVM VMs use
QCOW2 files stored in a local ext4 filesystem. This normally works great,
however today I experienced corruption of one of my VMs disks, causing a kernel
panic in the VM:
qcow2: Preventing invalid write on metada
barriers states that "Write barriers
enforce proper on-disk ordering of journal commits, making volatile disk write
caches safe to use, at some performance penalty". Does this apply to qcow2 VM
images?
Thanks,
Andrew Martin
uctor Technology Ltd. 4-Port PCIe
Serial Adapter
How can I give the VM access to these serial ports, either by
PCI pass-through or by virtualizing them in the host somehow?
Thanks,
Andrew
- Original Message -
> From: "Tony Su"
> To: "Andrew Martin"
>
am not familiar with the "virtual storage" method that you mention. Can
this be used with non-storage devices, such as a serial card? Do you have
any documentation on this feature?
Thanks,
Andrew
- Original Message -
> From: "Tony Su"
> To: "Andrew Mar
Hello,
I have a 4-port PCIe serial card that I would like to pass through to a VM. The
serial card has 4 serial ports on it, and I would like to pass all 4 ports
through. Here are the ports, as seen on the host:
# lspci
02:00.0 Serial controller: MosChip Semiconductor Technology Ltd. 4-Port PCIe
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