Do I need a physical stack on DLink switches?

Question

network hardware

Hello.
Given: 2 D-Link 1510-52 switches, 48 ​​ports each. About 70 devices (1Gbps) and a server (2 ports of 10Gbps
sfp +), a cable from devices to cat 6 switches are connected to them.
(70 pieces) and server?
- clients (70 pieces)?

Answer 1

Well, I would say that stacking or not is up to you, stacking makes life easier by combining the management of two switches into one.
But if you do not stack, then between the switches and, therefore, between ~ 35 (half of 70) users and the server, it turns out either 1 gigabit or, if you combine two SFPs - 20 gigabit?
In smart books, it is recommended to maintain an oversubscription rate of no more than 15 (and the more modern the books, the lower the coefficient, up to 4).
That is, for 15 clients to keep a gigabit uplink.
Accordingly, one 1G link for 35 users will not be enough. All the same it is necessary to connect on 10 or even 20 gigabits between switches.

Answer 2

You need to study the load on the network

Answer 3

Gather traffic statistics on ports (eg SNMP -> zabbix). There it will be clear if there are bottlenecks.
And the question is - are all clients and server in the same subnet and in the same VLAN?