[Ask] How many oversold that allowed for OpenVZ node?
I have dedicated server with this spec's
Intel Quad core x3460, 16GB of RAM, 2TB (Raid-1) disk, 10TB monthly bandwidth on 1 gbps shared uplinks...
I create a VPS plan which have 512MB of guaranteed ram (may be with 768MB or 1GB busrtable ram) & 300GB monthly bandwidth.
How many vps can be created in terms of safely oversold for RAM, Bandwidth and CPU?
Thanks in advance
You should host 16 - 24 VPS, depending of the burstable RAM you offer. Do not oversell. You will run into troubles.
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The only other issue I see here, is that you're only using 2x2tb drives in raid 1. A 4 drive raid 10 of 1tb drives will offer at least double the performance with the same amount of disk space. This will allow you to fit more users on there before everything starts to run slowly.
Yeah, you will reach the I/O limit of those hdds pretty soon. Raid10 may help you a little bit but far from double the IO.
Everything else looks ok, your first bottleneck will be the hdds. Keep in mind that there is no option to limit IO for a VM (ioprio is overrated) so any VM can bring your node to an unusable state and it will be pretty hard to figure out which of the VMs is responsible.
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When we built out our first node, we had an Intel C2Q Q9550 with 8GB of RAM and 2x1TB RAID 1. We fit about 20 VMs on that box before things started falling down around us. Not sure with your CPU/RAM though.