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Maximum VM at KVM server




Posted by alunrbt, 07-14-2016, 08:15 AM
To all experience guy, how many KVM VM could fit into the follow server spec: Dual Xeon E5-2620 128GB RAM 4*1TB SSD Hard Drive each of the vm have followiing configuration: 1 core 50GB Space 1GB RAM

Posted by net, 07-14-2016, 08:20 AM
You based it first with how much data space you have but still will depend on the VPS traffic you have for each one and how light, heavy the usage is.

Posted by Purevoltage, 07-14-2016, 11:37 AM
It really comes down to the usage on the system itself as said above. We can't tell how much resources your clients would be using and you should always monitor the usage on your VPS nodes to make sure everyone is getting good performance. Granted if you are looking to provide a budget service you could put as much on there as you like if you don't care about the performance it all comes down to what your goals are.

Posted by taro222, 07-14-2016, 11:50 AM
What VMs? Would they host websites or do anything cpu heavy? Depends on many variables.

Posted by bsinternet, 07-16-2016, 02:19 PM
This will have to do with the type of use on VMs. Some may use CPU extensive applications whereas some may use I/O extensive applications. While there you technically could - let's say - 30 or 40 VMs on such a node in terms of available resources, if all these VMs were to be used for quite high I/O extensive stuff, you may hit disk bottleneck easily and the performance may go bad quickly. If the type of use unknown, the best approach to monitor the system in terms of performance metrics in the long-run.

Posted by XIAOSpider, 07-17-2016, 04:21 AM
First, you should calculate the disk space. I think you are going to use RAID 10, right? Then 4x 1TB means you'll have 2TB space available. 50GB for each VM. So, not more than 40 VMs.



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