Re: ceph storage capacity does not free when deleting contents from RBD volumes

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Hi Albert,
to free unused space you must enable trim (or do an fstrim) in the vm - and all things in the storage chain must support this.
The normal virtio-driver don't support trim, but if you use scsi-disks with virtio-scsi-driver you can use it.
Work well but need some time for huge filesystems.

Udo

On 19.05.2016 19:58, Albert Archer wrote:
Hello All.
I am newbie in ceph. and i use jewel release for testing purpose. it
seems every thing is OK, HEALTH_OK , all of OSDs are in UP and IN state.
I create some RBD images (rbd create .... ) and map to some ubuntu
host . 
I can read and write data to my volume , but when i delete some content
from volume (e,g some huge files,...), populated capacity of cluster
does not free and None of objects were clean.
what is the problem ???

Regards 
Albert


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