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Poor read performance - 6.5.0 On Ultra 4 Plus
I upgraded to 6.5.0 a while ago, mainly to get the new plex updates, and have read of a slight performance hit, and I expectedthat. However write performance is exceptional, able to write at 100M...
Might have found a solution:
https://community.spiceworks.com/topic/1581799-readynas-516-extremely-slow-nfs-performance
Will test a little later.
Right I have shut down my VMware cluster and read performance is as expected 100mb via SMB. Previously I was still able to get 100mb through put on my desktop with the VMware cluster running!
So this would indicate to me an issue with NFS? Any help would be welcomed.
Right, single VM, 2 NFS threads, and SMB file transfers are ~30mb. Turn the VM off and I get 100Mb again from SMB.
Vez wrote:
Right, single VM, 2 NFS threads, and SMB file transfers are ~30mb. Turn the VM off and I get 100Mb again from SMB.
Do you have any way to gauge how much I/O the VM is doing?
Its a 2012 domain controller sat there only serving DNS - with zero accounts on so no authentication. I will check the vsphere logs later after spining it up again.
I will have a full graph within an hour, however with 2 VM's running a single ESXi host (the other has zero VM's running at this time for this test) are utilising a Datastore @:
Average Read: 239.65kbps
Average Write 101.022kbps
First VM is an Ubunto server (VPN server with no conections) - the Virtual disc is cached entirely on the host on SSD - so very little if any NFS usuage.
Second VM is 2012R2 - presently doiong windows updates. All it does is server DNS for my home network (25% of the disc sits on SSD Cache).
SMB performance whist almost nothing is going on: an average of ~35Mbs.
This is with 2 NFS threads. Something appears distictly wrong with prioritisation here. This was never an issue before changing to 6.
Thoughts? (Graph still compiling).
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