Somehow one of my storages does not have thin provision on it (ZFS storage if that matters) and I migrated a number of machines to it. Is there a way to enable thin provisioning (yes I know about the check box) AND then have the images shrunk to be thinly provisioned. Of course would prefer if this can be done with the images running. Thanks!
Thin Provision
- Thread starter lweidig
- Start date
Can you provide more details on this and maybe even steps to accomplish. It is on local storage. Thanks!
The same applies to ZFS over iSCSI. This is at least true for Comstar iSCSI provider.
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1. set the virtual disk type to SCSI
2. set the SCSI controller type (in "Options") to VIRTIO-SCSI
Start the VM and do a "fstrim /" or the filesystems you want to trim. For Windows or other OSes you need to find the equivalent.
2. set the SCSI controller type (in "Options") to VIRTIO-SCSI
Start the VM and do a "fstrim /" or the filesystems you want to trim. For Windows or other OSes you need to find the equivalent.
1) Choose SCSI emulation for drives
2) Choose VIRTIO for scsi controller type (options tab)
3) Assuming Linux OS in guest: run fstrim <PATH to disk mount> (If disk is mounted on root (/) then fstrim /
2) Choose VIRTIO for scsi controller type (options tab)
3) Assuming Linux OS in guest: run fstrim <PATH to disk mount> (If disk is mounted on root (/) then fstrim /
Conveniently, for any OS (including Linux) simply filling the disk with 0 bytes does the trick, as the underlying ZFS will compress those blocks down to nothing. Here's what I do on FreeBSD:
Code:
cd /
dd if=/dev/zero of=filler bs=4k
rm fillerRepeat for each disk partition. Let the dd command run until it gives a disk full error.