Gaps in Graphs PVE4.4-1

qgrasso

Member
Jul 31, 2013
27
4
23
Queensland, Australia
Hi,

I seem to be having some issues with gaps in our graph system status pages.

Our nodes are using 8x 960gb Samsung pm863a ZFS in raidz2 configuration w/ Dual E5-2630v4 CPU's.

I'm moving some VM's from internal ZFS storage on node 4 to a VM, I setup on node 6 which is sharing out a virtual disk via NFS to do the hop between nodes.

I'm using live storage migration to move the virtual disks from node 4 to the NFS Share and then move the VM to node 5 and migrate the storage back to the ZFS target on node 5.

I can see this is creating quite a bit of load on the node 6 (io wait) however i'm not quite sure why its seems to affect the graphs across all of the nodes at the same time gaps.

Thanks,
Quenten

gaps.png
 
Under heavy load, it could be that the data cannot be acquired in time. I had similar problems when mounted NFS was gone (NFS server crash).