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[Qemu-devel] qemu drive-mirror to rbd storage : no sparse rbd image
From: |
Alexandre DERUMIER |
Subject: |
[Qemu-devel] qemu drive-mirror to rbd storage : no sparse rbd image |
Date: |
Wed, 08 Oct 2014 13:15:47 +0200 (CEST) |
Hi,
I'm currently planning to migrate our storage to ceph/rbd through qemu
drive-mirror
and It seem that drive-mirror with rbd block driver, don't create a sparse
image. (all zeros are copied to the target rbd).
Also note, that it's working fine with "qemu-img convert" , the rbd volume is
sparse after conversion.
Could it be related to the "bdrv_co_write_zeroes" missing features in
block/rbd.c ?
(It's available in other block drivers (scsi,gluster,raw-aio) , and I don't
have this problem with theses block drivers).
Regards,
Alexandre Derumier
- [Qemu-devel] qemu drive-mirror to rbd storage : no sparse rbd image,
Alexandre DERUMIER <=
Re: [Qemu-devel] qemu drive-mirror to rbd storage : no sparse rbd image, Paolo Bonzini, 2014/10/12