Imagine that your company has hundreds of decisions, managers, and employees who need to exchange information and negotiate with each other. You might choose to locate your company's headquarters in a prime downtown area like Shanghai Lujiazui. Although the real estate is costly, the strategic location ensures efficient operations and quick access to clients and partners. In addition, if your business involves a large volume of goods that require storage and transportation, it’s common for warehouses to be situated near airports in the outer suburbs. The land here is more affordable, and the logistics are more convenient.
This concept of “land value†isn’t just relevant to physical locations—it also applies to computer systems. Think of the CPU, memory, and disk as different parts of a system, each with its own "value." The closer a component is to the CPU, the faster and more efficient it tends to be. This means that the space near the CPU has higher value due to lower latency and better performance. In contrast, components further away have less value. So, in a data center, external storage can be compared to a warehouse located far from the main building—efficient but not as fast or direct.
In blade server systems, the idea of “land price†is very clear. A typical blade server consists of a multi-slot chassis with a high-speed backplane. These chassis are expensive, so manufacturers offer various blades, such as CPU blades, storage blades, and switch blades, allowing users to customize their setup. Without focusing on specific product prices, we can draw some general conclusions based on the cost structure:
1) It’s usually better not to install disks directly on the CPU blade. The valuable space should be used for more critical components like CPUs and memory, which provide greater return on investment.
2) Storage blades should also be avoided. The limited slots should prioritize more valuable components like CPU or switch blades.
3) Instead, connect an external JBOD (Just a Bunch Of Disks) to supply storage for all the CPUs in the blade system. This approach is both cost-effective and scalable.
In large-scale data centers, similar principles apply. By reducing the number of disks per node, you can significantly increase server density. For example, moving from 1U to 1U2, then to 1U3 or 1U4, allows more servers to fit into the same rack. Today, the industry’s highest density can accommodate up to 160 server nodes per rack, totaling 320 CPUs—more than four times the density of traditional racks.
Efficiency improvements aren't just about space; they also enable better device sharing within a tightly packed system. For instance, Facebook’s design allows four server nodes to share one Ethernet card and a PMC+Intel RSA module. Similarly, several NVMe SSDs can be shared among multiple nodes when they are densely packed in a small space. This makes high-speed PCIe connections possible through low-cost PCBs, eliminating the need for expensive cabling.
In the Scorpio 2.0 rack, partners have integrated SAS Switch and JBOD solutions, making it easy to deploy a SAS-based storage architecture. This setup allows for flexible and efficient resource management.
To optimize resource utilization in a rack, you need to determine how many server nodes and JBODs to include. The key lies in the application's specific needs, particularly the ratio of CPUs to disks. This ratio can be calculated based on the application’s performance requirements and adjusted dynamically over time to ensure optimal efficiency.
The process involves analyzing workload patterns and balancing resources accordingly. Deploying SAS Switch technology in enterprise and data center environments is a fundamental step toward achieving this balance and improving overall system performance.
AC Power Supplies
AC power supply is a kind of power supply that converts the input mains or DC input into a pure sine wave output after AC-DC-AC or DC-AC conversion. The ideal AC power supply is characterized by stable frequency, stable voltage, zero internal resistance and pure sine wave output voltage wave (without distortion). Mainly used for power grid simulation tests conducted by various electrical appliance manufacturers on electrical appliances according to the voltage/frequency requirements of different countries, various AC motors, AC transformers, aircraft & mechanical equipment and other electronic devices that require pure, regulated and frequency-stabilized output.
Our AC power supply mainly includes three types
1. AC Power Supplies converting the input mains AC by AC-DC-AC, output voltage and frequency are stable and adjustable with pure sine wave output waveform, so called: Variable Frequency AC Power Supplies.
2. AC Power Supplies converting the DC output of the battery and other DC equipment by DC-AC, giving an AC sinusoidal output with stable output voltage and frequency. so called: Inversion AC Power Supplies.
3. AC Power Supplies converting the input mains AC by AC-DC-AC, giving a variable voltage AC output at constant 400Hz output frequency ultra-high output frequency stability. so called: Intermediate Frequency AC Power Supplies.
4. According to the difference in the number of output phases, the AC Power Supplies can be divided into single-phase output AC power supplies and three-phase output AC power supplies.
Different from Variac and AC voltage regulators, our AC power supplies support the setting of output voltage and frequency and has superior high precision, high stability, and high efficiency stable frequency AC output, not only for AC power conversion but also for AC high precision test purpose.
Through the friendly operation panel, you can read the output data such as output voltage, output current, output power, power factor, etc., providing accurate data records for your test, and can add RS485 interfaces as standard, following the MODBUS-RTU international communication protocol, which can realize remote control and operating status monitoring of the power supplies.
Our AC Power Supplies have comprehensive protection functions, such as: over voltage, over current, over temperature and short circuit protections, which can protect the AC power supplies and DUT from damages.
AC Power Sources, AC Sources, AC - AC Power Supplies, DC - AC Power Supplies, AC Switching Power Supplies
Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com
