SSD performance of 15 Mb / s on VPS in the clouds, is it a lot or a little?

Question

Iron

In the Yandex cloud, when a small disk (10 GB for example) is connected to an SSD virtual machine, the disk performance is reading 15 MB / s, writing 15 MB / s
Why so little? It's an SSD.

Immediately, if you look at the HDD, then it has 30.

Answer 1

The total bandwidth is shared among other VMs. So that there are no evil neighbors - they limit productivity artificially.
+ look at IOPS'y. SSDs have 3 times more of them, which on tasks with small blocks will give a multiple increase in performance

Answer 2

Why so little? It's an SSD.

It's a virtual machine.
All host resources are divided between running virtual machines either equally or according to specified rules.
For example, I can run ten virtual machines on a computer with four cores and allocate four cores to each.
In general, all these SSDs in the VM description are nothing more than marketing, how many resources the master cuts off on the hypervisor, there will be so many. You need to look at the real performance, and not at what is there in those. specifications are indicated.

Answer 3

First, it is better to check on a real load.
Secondly (I'm not familiar with Yandex), usually the performance is better, the larger the disk. In AWS, the formula is 3 IOPS per GB, you can buy reserved IOPS storage.

Answer 4

It is necessary to read the full price list of virtuals sold by Yandex. I think that the guarantees for the speed and availability of ssd pancakes are simply taken into account in the price of the virtual machine itself. And you just need to pay extra money.