[Qemu-discuss] What does "COW" mean?

Hi, I'm new to qemu community, and I'm trying the COW image format (old but simple:-). I have read through its source code, and didn't find anything about 'copy on write'. I wonder wthat "COW" stands for? -- Regards, shhuiw

Re: [Qemu-discuss] network latency for virtio-net-pci

On 09/02/2014 06:05 AM, Zhang Haoyu wrote: We running qemu 1.5, and one of the users complains on high latency on the overlay network of openstack. I done some research and comparation and found those numbers: V - virtual machine with qemu/virtio-net-pci tap device. H - hardware server S - hard

Re: [Qemu-discuss] What does "COW" mean?

On 02/09/2014 10:33, shhuiw wrote: Hi, I'm new to qemu community, and I'm trying the COW image format (old but simple:-). I have read through its source code, and didn't find anything about 'copy on write'. I wonder wthat "COW" stands for? COW = Copy On Write is a general computing technique w

Re: [Qemu-discuss] What does "COW" mean?

At 2014-09-02 04:33:50, "shhuiw" wrote: > > >Hi, > >I'm new to qemu community, and I'm trying the COW image format (old but >simple:-). >I have read through its source code, and didn't find anything about 'copy on >write'. >I wonder wthat "COW" stands for? Sorry for my unclear expression. I m