Re: [Rdo-list] Max VM filesystem size?
Ah, it appears that the limit is 2TB because the VMs are created with a
'msdos' partition table on the virtual disks. I think we need them to
be 'gpt'.... parted shows the disks are big, just the filesystems are
small:
[centos@bigtest2 ~]$ sudo parted /dev/vda
GNU Parted 3.1
Using /dev/vda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 10.7TB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 1941GB 1941GB primary xfs boot
Still digging for info on how to use gpt with OpenStack/libvirt....
Nothing yet...
On 11/20/2015 02:51 PM, Erich Weiler wrote:
Hi Y'all,
I have a bunch of OpenStack Nova nodes, each with 11TB of local disk for
Cloud VMs. This is all on RDO - RHEL 7 on OpenStack Kilo. That local
storage is configured with a XFS filesystem.
If I specify 8TB on 'root filesystem size' in a flavor, it only seems to
be able to make a 2TB root filesystem on the guest. No matter what
guest OS I use (I've tried CentOS 7.1, Ubuntu 15.10, others) it only
seems to be able to create a 2TB root filesystem. I've also tried
making a 5GB root filesystem and specifying 8TB for ephemeral disk, but
the ephemeral disk that shows up on /tmp in the guest is only 2TB as well.
Is there a 2TB KVM limit on VM size? Max file size in ext4 and XFS is
well beyond 2TB, so I don't think that's it... Maybe a limit in KVM or
libvirt?
The qemu xml file on the node does specify a 8TB disk....
Any insight most welcome!!
cheers,
erich