Analysis on Energy Saving of Computer Room Server
The current social energy problem is increasingly prominent, and the contradiction between the low efficiency of server power utilization and the new round of growth of IT architecture intensifies. There are thousands of servers in a large and medium-sized data center, and the energy consumption is huge. If we can save some energy on each server, we can save a lot of energy on the whole. This is significant for data center energy consumption.
The energy saving of the server in the computer room is carried out on the premise of not reducing the running performance of the server. To save energy, first we should be familiar with our servers and find the source of energy consumption. The server is mainly composed of CPU, memory, disk, network card, and motherboard components. Among them, CPU is the major power consumer, followed by memory, followed by disk power consumption. If we can reduce the energy consumption of these components, it is equivalent to reducing the energy consumption of the entire server. So as to achieve the purpose of server energy saving.
1. CPU power saving
CPU is not only the core component of the server, but also the source of energy consumption. Many energy saving schemes mention the energy saving of CPU. At present, there are three main types of CPU energy saving technologies: enhanced deep sleep technology, which can reduce the working voltage and frequency multiplication when the CPU is idle and light loaded. Intel's CPU also supports an EIST energy saving technology. By enabling EIST, the CPU can control the frequency and voltage according to the actual usage, thus realizing power consumption control. AMD also introduced "cool and quiet", which is also an energy-saving technology that allows processors to automatically reduce voltage and frequency when idle. The principle of all these CPU energy saving technologies is to enable the CPU to work on demand, reduce the working frequency when idle, and achieve server energy saving.
2. Memory saving
Memory is the most energy consuming component besides CPU. Memory energy saving technologies include DDR SDRAM, DDR3 SDRAM and even DDR4. These memories have lower voltage. When there is no read/write operation, you can use the Reset command to stop all operations and switch to the least active state to save energy. You can also work hard on the density of memory cabling and achieve the goal of energy saving. Memory is generally 50 nm. 50 nm refers to the width of the wiring between semiconductor component substrate circuits is 50 nm. Now there are 40 nm, or even 30 nm, which means that more circuits can be accommodated in the same space.
3. Disk Power Savings
The role of disk in the server is to ensure data security. So it is very important. What should we do to save energy on disk? Disk energy saving technologies mainly include disk hibernation and disk spin down. These technologies seem to control the disk to work in four states according to the disk load (access): full speed, idle, hibernation, and power down. Full speed naturally means that the disk is running at a high speed and is reading and writing data; And leisure is only a short leisure period during reading and writing; If the disk does not work for a certain period of time, it will enter the sleep state; If the disk does not work for a long time, it will enter the power-off state; When the disk is running, the software can automatically adjust the working state of the disk, so as to achieve the energy-saving effect. Of course, too frequent switching of the working state will also affect the reliability of the disk. It is also necessary to consider that the application business can tolerate the delay caused by the disk switching from the low power consumption mode to the high-speed mode. Therefore, the adoption of this dynamically adjusted energy saving technology should be considered comprehensively and carefully. In addition to adjusting the working state of the disk, you can also use a variety of speed disks, replace mechanical disks with SSD hard disks, and so on.
It is not difficult to see that the methods of energy conservation within the server room follow the same principle, that is, distribution on demand. Provide proper power consumption according to the actual state of component operation, without wasting any extra energy consumption. A little bit of energy consumption seems insignificant, but a little bit of accumulation, and then amplified to the entire data center, will be a huge energy saving. Through the energy saving of the server, the energy saving development in data can be realized.
