Does Proxmox take advantage of more core? Should I choose Intel® Xeon E3 1245 v5 (4 C / 8T @3.5 Ghz cache L3 8MB, x64, VT) or Intel Xeon® D-1531 (6 C / 12T @2.2 Ghz Cache L3 9MB, x64, VT-x, AES-NI)?
CPU 4C/8T 3.5Mhz vs 6C/12T 2.2Mhz
- Thread starter kamzata
- Start date
That depends on the application you want to run in your VMs and how many VMs you want. Simple rule of thumb is also the combined clockspeed: e.g. 4*3.5 GHz vs 6*2.2 GHz.
If you want to virtualize a single-threaded, high performance application, use the model which has the higher clock rate. If you want to have more power for parallel tasks, e.g. serving files, webserver, (some) databases, use the more cores. 2.2 Ghz vs. 3.5 GHz is a gap of more than 50% clock rate increase from the lower speed model.
We run both: We have 4x CPU AMD Opterons with 12 cores each at 1.8 GHz and 2x 3 GHz Intel Hexacore and depending on the application, each has its benefits. Massively parallel computation is much faster on the more-core machine, yet a simple VDI is much faster on the Intel machine.
If you want to virtualize a single-threaded, high performance application, use the model which has the higher clock rate. If you want to have more power for parallel tasks, e.g. serving files, webserver, (some) databases, use the more cores. 2.2 Ghz vs. 3.5 GHz is a gap of more than 50% clock rate increase from the lower speed model.
We run both: We have 4x CPU AMD Opterons with 12 cores each at 1.8 GHz and 2x 3 GHz Intel Hexacore and depending on the application, each has its benefits. Massively parallel computation is much faster on the more-core machine, yet a simple VDI is much faster on the Intel machine.
I'm not using any VM. I'm using several CTs, mostly web (mainly Apache, Nginx) and small database servers (mainly MySql). On each CT I usually assign 2 CPU thread and 2GB of RAM.
If this is your usecase I would go for more cores instead of GHz. Webservers and database servers adores cores
