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2019-05-13 03:46:53 -0500 评论问题 Instance with 150GB disk flavor started consuming more storage than what we set the size of disk in flavour.

qemu-img info /var/lib/nova/instances/_base/c4cb69e2629d118506c456884778e0ffb68d3bbf image: /var/lib/nova/instances/_base/c4cb69e2629d118506c456884778e0ffb68d3bbf file format: raw virtual size: 40G (42949672960 bytes) disk size: 8.3G
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2019-05-08 00:39:29 -0500 问了问题 Instance with 150GB disk flavor started consuming more storage than what we set the size of disk in flavour.

I had a flavor x-large and details are below:

qemu-img info /var/lib/nova/instances/b62da31b-83d1-4228-92ee-75da2120fd58/disk
image: /var/lib/nova/instances/b62da31b-83d1-4228-92ee-75da2120fd58/disk
file format: qcow2
virtual size: 150G (161061273600 bytes)
disk size: 260G
cluster_size: 65536
backing file: /var/lib/nova/instances/_base/c4cb69e2629d118506c456884778e0ffb68d3bbf
Format specific information:
    compat: 1.1
    lazy refcounts: false
    refcount bits: 16
    corrupt: false

Instance size on storage:

du -sh /var/lib/nova/instances/b62da31b-83d1-4228-92ee-75da2120fd58
260G    /var/lib/nova/instances/b62da31b-83d1-4228-92ee-75da2120fd58

openstack flavor show 3c5b20c1-1450-4460-a502-2984ef177767
+----------------------------+--------------------------------------+
| Field                      | Value                                |
+----------------------------+--------------------------------------+
| OS-FLV-DISABLED:disabled   | False                                |
| OS-FLV-EXT-DATA:ephemeral  | 0                                    |
| disk                       | 40                                   |
| id                         | 3c5b20c1-1450-4460-a502-2984ef177767 |
| name                       | x-large                              |
| os-flavor-access:is_public | True                                 |
| properties                 |                                      |
| ram                        | 16384                                |
| rxtx_factor                | 1.0                                  |
| swap                       |                                      |
| vcpus                      | 4                                    |
+----------------------------+--------------------------------------+

If I login VM and check the size it is showing less than 150GB. I had same issue with some other images. My questions:

  1. Is there is any issue with respect to images which are casing to consume more disk space or
  2. Issue with any configuration. If there is any problem with configuration then rest of the images also consume storage.

Since my env is Solaris, Below is the output of format and zpool list commands:

root@viweb-dr-test:/root# zpool list NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT rpool1 39.9G 15.7G 24.1G - 25% 39% 1.00x ONLINE -

Searching for disks...done

AVAILABLE DISK SELECTIONS: 0. c2t0d0 <virtio-block device-0000-40.00gb=""> /pci@0,0/pci1af4,2@4/blkdev@0,0 1. c3t0d0 <drive type="" unknown=""> /pci@0,0/pci1af4,2@5/blkdev@0,0