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I have recently starting using a Linode and a Digital Ocean droplet. I have not had speed problems with either one, and that led me to wonder exactly how they balance resources among the various VPSs on a given physical machine.
For CPU it seems straightforward: a VPS gets to use one (or more?) of the CPUs for some number of milliseconds, then control transfers to another VPS.
For disk, it also seems straightforward with a solid-state drive.
But if the drive was a hard disk, it seems much more difficult to keep one VPS's disk use from interfering with that of other VPSs'.
So my question is simply: did the advent of cheap solid-state drives fundamentally make VPSs more compartmentalized and reliable?
M Katz
Posted 2018-07-03T12:42:17.707
Reputation: 141
A VPS does not require the use of SSD, when SSDs were more expensive (i.e. $5 per GB), you would typically pay extra so your VPS would be stored on an SSD instead of a mechanical drive. VPS are compartmentalized due to the hypervisor not due to what storage device they use. – Ramhound – 2018-07-03T13:33:06.180
Right, my question is: When SSD cost was prohibitive and VPS used hard disk, was it harder to keep a VPS from causing performance issues for other VPSs on the same machine? – M Katz – 2018-07-03T19:43:27.083
1Yes - HDD performance was/is a major concern when provisioning general purpose VPS's. – davidgo – 2018-07-03T19:48:30.927