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Add disk preallocation support

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preallocation=metadata is now the default as it offers the best size/performance.
This commit is contained in:
Martin Wimpress 2021-09-28 22:47:26 +01:00
parent ad7f4a2aef
commit a611aa6005
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GPG key ID: 61DF940515E06DA3
2 changed files with 25 additions and 1 deletions
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12
quickemu
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@ -235,10 +235,19 @@ function vm_boot() {
if [ ! -f "${disk_img}" ]; then
# If there is no disk image, create a new image.
mkdir -p "${VMDIR}" 2>/dev/null
if ! ${QEMU_IMG} create -q -f qcow2 "${disk_img}" "${disk}"; then
case ${preallocation} in
off|metadata|falloc|full) true;;
*)
echo "ERROR! ${preallocation} is an unsupported disk preallocation option."
exit 1;;
esac
# https://blog.programster.org/qcow2-performance
if ! ${QEMU_IMG} create -q -f qcow2 -o lazy_refcounts=on,preallocation="${preallocation}" "${disk_img}" "${disk}"; then
echo "ERROR! Failed to create ${disk_img}"
exit 1
fi
if [ -z "${iso}" ] && [ -z "${img}" ]; then
echo "ERROR! You haven't specified a .iso or .img image to boot from."
exit 1
@ -618,6 +627,7 @@ guest_os="linux"
img=""
iso=""
port_forwards=()
preallocation="metadata"
ram=""
usb_devices=()
virtio_blk="on"