On Thu, Aug 6, 2020 at 5:35 PM Jorge Visentini <jorgevisent...@gmail.com> wrote:
>
> Hi oVirt land.
>
> Can I convert the disks of Thin Provision to Preallocated?
We don't have a way to convert the format for the same disk.
We should have this in future version, since it is important for
incremental backup.
The most flexible way now is to download and upload the disk. During
upload you can
convert the disk format.
Here is an example:
Download qcow2 disks to raw-sparse format:
$ ./download_disk.py \
--engine-url https://engine3 \
--username admin@internal \
--password-file engine3-password \
--cafile engine3.pem \
--format raw \
58daea80-1229-4c6b-b33c-1a4e568c8ad7 \
/var/tmp/download.raw
Connecting...
Creating image transfer...
Transfer ID: fe4c3409-7e82-4d68-a68b-8b61b9d70647
Transfer host name: host4
Downloading image...
Formatting '/var/tmp/download.raw', fmt=raw size=6442450944
[ 100.00% ] 6.00 GiB, 9.45 seconds, 650.28 MiB/s
Finalizing image transfer...
$ qemu-img info /var/tmp/download.raw
image: /var/tmp/download.raw
file format: raw
virtual size: 6 GiB (6442450944 bytes)
disk size: 2.18 GiB
We could download also to qcow2 format, this was just an example how
you can convert the format during download.
Now upload back to new disk in raw preallocated format.
$ ./upload_disk.py \
--engine-url https://engine3 \
--username admin@internal \
--password-file engine3-password \
--cafile engine3.pem \
--sd-name nfs1 \
--disk-format raw \
/var/tmp/download.raw
Checking image...
Image format: raw
Disk format: raw
Disk content type: data
Disk provisioned size: 6442450944
Disk initial size: 6442450944
Disk name: download.raw
Disk backup: False
Connecting...
Creating disk...
Disk ID: beb2435e-9607-4a09-b6a6-b5e5f4ae9fd8
Creating image transfer...
Transfer ID: b9fd2ad9-be85-4db8-998b-c5f981f8103c
Transfer host name: host4
Uploading image...
[ 100.00% ] 6.00 GiB, 5.30 seconds, 1.13 GiB/s
Finalizing image transfer...
Upload completed successfully
You can replace now the old thin disk (58daea80-1229-4c6b-b33c-1a4e568c8ad7)
with the new preallocated disk (beb2435e-9607-4a09-b6a6-b5e5f4ae9fd8).
Nir
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