RHV - Failed to add a new 2TB preallocated disk to a VM
Issue
The environment consists of 3 RHV hosts and 3 RHGS hosts.
It behaves stable during normal operations, but problems appear when we add to a VM a large "Preallocated" disks of size higher than 1.5TB , IO timeouts appear in the 3 RHV hosts , causing several VMs to pause.
Adding Thin-provisioned disks do not cause problems.
Environment
-
Storage provided by a 3 node RHGS 3.5 cluster:
glusterfs-6.0-29.el7rhgs.x86_64
kernel-3.10.0-1062.12.1.el7.x86_64 -
Virtualization on a 3 node RHV 4.3 cluster.
HostedEngine on NFS storage: ovirt-engine-4.3.8.2-0.4.el7.noarch
Hosts: RHVH rhvh-4.3.8.1-0.20200126.0
vdsm-4.30.40-1.el7ev.x86_64
vdsm-gluster-4.30.40-1.el7ev.x86_64
kernel-3.10.0-1062.12.1.el7.x86_64
glusterfs-fuse-6.0-29.el7rhgs.x86_64
ioprocess-1.3.1-1.el7ev.x86_64
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