Hello XCP Community,
I guess thats the question. Does pinning CPUs in dom0, effectively taking them away from guests, provide enough benefit to be worth it? Now I know this is a very large question with a metric s#&t ton of variables, I am just asking in general. Is there a threshold that you have seen this provide benefit?
I look forward to your thoughts.
@nikade I am trying to move the VDI from one storage SR to another on the same host. This is not in a cluster. This is a standalone host.
@olivierlambert Here is the amount of free RAM on the system.
But when I try to migrate a VDI to a new storage repo, I get this error:
HOST_NOT_ENOUGH_FREE_MEMORY(8663334912, 3104964608)
I can create a new VM on that SR without issue.
I have a small server that I use as a test host, and I added some SRs on it that are network-based. One is NFS and the other is iSCSI. VMs work fine on these SRs, but when I go to migrate a VDI on a running VM, with the Xen tools, I get a "not enough free RAM" error regardless of whether I try to migrate it to the NFS or iSCSI SRs. This host is very short on RAM. I am running the latest patched 8.3 with QCOW enabled. I tried two machines. One was an existing with a VHD disk and the other is a VM with a QCOW2 disk.
Thank you for the help.
@olivierlambert ok, i see my order of operations is wrong. Thank you for the help.
So quick question about memory ballooning since we're talking about memory. I assume you can over-subscribe memory? This would be done with the dynamic ranges?
Hello,
I am running a Linux box on XCP-NG 8.2.1 that shows the tools in use, and when I try to change the VM's dynamic memory, it says it needs to be rebooted. Am I missing something?
Hello,
Can a VMware import job be performed via a proxy or do I need to install XOA on the site where the XCP-NG and Vmware server is running?
Thank you for the help.
Hello,
I am trying to deploy a new proxy on a remote XCP-NG host, and I ran the CLI command on the XCP-NG host and it all went without error. I then port forward port 4465 to the internal IP of the proxy (443). I then go to my XOA to register the proxy but it telling me unauthorized, a 401.
I used the token from the install.
I have set these up before. Am I missing something?
@olivierlambert I 100% agree its vague. I even told the person that. Like I was saying I was more looking for anyone who has ran a cluster in those other scheduler settings to get some feedback on it.
I guess being a little more specific, would socket or Core be better for VMs that are NUMA sensitive? Such as database servers or the like?
It "works" but we have more than one person that complain of "its not as snappy" as something like VMware or Proxmox (I know Proxmox is KVM).
I also have an opportunity that I am trying to get to use XCP but this is the argument I am getting. They say it performs like a vm on VMware with out the VMware drivers.
So I wanted to just get an understanding of what other people have seen when changing this.
So does the fact that tapdisk is single threaded beg to question that its performance is going to be tied to the speed of the CPU?
Also, when looking at some settings on some of the VMs created, I see on the VM this:
Where would I find what "default behavior" is?
I know this topic has been brought up and discussed a few times over the years, but I would like to get some insight into, in general, would be the best setting for performance and sclability for XCP in a "private cloud" hosted use case. In this use case, we have very little control over how our customers use XCP. There could be database servers, web servers, file servers, even Minecraft servers. 
We are currently just using defaults (CPU) and was wondering if moving to CORE would be better over all. We want to make sure we address things such as NUMA boundaries and things like that.
Any guidance would be appreciated or real world examples. Thank you as always.
I know this thread is over a year old, but I has there been any improvements to tapdisk over the course of this time?
Thank you for the reply. The use case is to centralize all of our reporting and monitoring for all of our devices. We have a number of XCP host, various servers, etc, that we are responsible for, and all of them besides our XCP nodes are being monitored for real-time analytics by Netdata. We are also using Zabbix for trending and long term usage but would like to be able to move the XCP nodes into our Netdata cloud versus being just on XOA/XCP.
I also understand this would be overidden by updates and that you guys cant support it. I mainly wanted to see if it would "break" anything you already have in place. As a feature request, maybe have a way that you can report to a Netdata cloud instance. That would be nice.
Hello,
I know you have the Netdata binaries on XOA/XCP with the advanced analytics, but do you guys "support", and I use support as in not Vates supporting me on its use, but if I installed this, would this cause an issue with your implementation of Netdata? Also, would this need to be reinstalled after every update of XCP-NG.
Thank you for the help.
And if I am not mistaken, this setting in Proxmox has nothing to do with RDP connections, this would only apply to the "console" correct?
