[ceph-users] Re: Erasure-coded Block Device Image Creation With qemu-img - Help

On Wed, Mar 17, 2021 at 04:29:10PM +1100, duluxoz wrote:

```

rbd create -s 1T --data-pool my_pool my_pool_metadata/my_data

```

First Question: Is this correct?

Yes

Second Question: What is the qemu-img equivalent command - is it:

```

qemu-img create -f rbd rbd:--data-pool my_pool my_pool_metadata/my_data 1T

```

To make qemu-img use the data pool you can set rbd_default_data_pool param in ceph.conf, or use CEPH_ARGS environment variable. Something like this: ``` CEPH_ARGS=--rbd_default_data_pool=my_pool qemu-img create -f rbd rbd:my_pool_metadata/my_data 1T ``` -- Mykola Golub