Difference between revisions of "Qemu-img create"
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| − | * <code>qemu-img create -f [[qcow2]] MY_IMAGE_NAME. | + | * <code>qemu-img create -f [[qcow2]] MY_IMAGE_NAME.[[qcow2]] 10G</code> |
* <code>qemu-img create -f raw MY_IMAGE_NAME.img</code> | * <code>qemu-img create -f raw MY_IMAGE_NAME.img</code> | ||
| − | * <code>qemu-img create -f qcow2 -o preallocation=metadata,compat=1.1,lazy_refcounts=on MY_IMAGE_NAME.img</code> | + | |
| + | * <code>qemu-img create -f qcow2 -o preallocation=metadata,compat=1.1,lazy_refcounts=on MY_IMAGE_NAME.img 600GB</code> | ||
:::<code>lazy_refcounts=on</code> Reference count updates are postponed with the goal of avoiding metadata I/O and improving performance. Particularly interesting with cache=writethrough. | :::<code>lazy_refcounts=on</code> Reference count updates are postponed with the goal of avoiding metadata I/O and improving performance. Particularly interesting with cache=writethrough. | ||
| + | qemu-img create -f [[qcow2]] MY_IMAGE_NAME.img 10G | ||
| + | |||
| + | |||
| + | qemu-img create -f qcow2 MY_IMAGE_NAME.qcow2 20G | ||
| + | Formatting 'MY_IMAGE_NAME.qcow2', fmt=qcow2 size=21474836480 cluster_size=65536 lazy_refcounts=off refcount_bits=16 | ||
| − | + | qemu-img create -f [[qcow2]] MY_IMAGE_NAME.img | |
qemu-img: MY_IMAGE_NAME.img: Image creation needs a size parameter | qemu-img: MY_IMAGE_NAME.img: Image creation needs a size parameter | ||
| + | |||
| + | == Related commands == | ||
| + | * <code>[[virt-install]]</code> | ||
| + | * <code>[[virt-resize]]</code> | ||
== See also == | == See also == | ||
Latest revision as of 07:55, 5 August 2020
qemu-img create -f qcow2 -o preallocation=metadata,compat=1.1,lazy_refcounts=on MY_IMAGE_NAME.img 600GB
lazy_refcounts=onReference count updates are postponed with the goal of avoiding metadata I/O and improving performance. Particularly interesting with cache=writethrough.
qemu-img create -f qcow2 MY_IMAGE_NAME.img 10G
qemu-img create -f qcow2 MY_IMAGE_NAME.qcow2 20G Formatting 'MY_IMAGE_NAME.qcow2', fmt=qcow2 size=21474836480 cluster_size=65536 lazy_refcounts=off refcount_bits=16
qemu-img create -f qcow2 MY_IMAGE_NAME.img qemu-img: MY_IMAGE_NAME.img: Image creation needs a size parameter
Related commands[edit]
See also[edit]
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