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What is InfiniBand and Why is it used in HPC?

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According to the top 500 list, more 50% of supercomputer interconnect devices are InfiniBand based and the percentage is growing YOY. Why are most HPC data centers deploying InfiniBand instead of Ethernet or OPA in their network? Learn more:  What Is InfiniBand and Why Is It Used in HPC? InfiniBand Is Widely Used in Supercomputers and HPC Data Centers Early in June 2015, InfiniBand consisted of 51.8% in the Top500 list of the world’s most powerful supercomputers, with a 15.8% year-on-year growth. TOP500 Interconnect Trends, June 2015. Image source: IBTA  Home In the  Top500 list in June 2022 , InfiniBand networks once again topped the list of supercomputer interconnect devices with absolute numbers and performance advantages, a significant increase from the previous list. Throughout this list, the following three trends can be summarized. Supercomputers based on InfiniBand networks are significantly ahead of other network technologies with 189 systems. InfiniBand-based supercomputers l
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Things You Should Know About SFP Transceiver

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High speed  development of optical communication requires communication system with lower energy consumption and higher bandwidth. SFP  transceiver  plays an extremely important role in this system. This article focus on SFP transceiver. Figure 1: Examples of SFP transceiver. SFP  Transceiver Introduction SFP  module,  also called as small form-factor pluggable or mini GBIC (gigabit interface converter), is a compact, hot-pluggable optical transceiver module. It’s designed to support Fibre Channel, Gigabit Ethernet  and  other communication standards. SFP modules are used in network switches, routers or network interface cards, supporting different speeds such as 2G, 4G or even more. Types of SFP  Transceiver SFP transceiver module comes in various types on the basis of different classification standards. Basically, SFP transceiver is divided into fiber SFP and  copper SFP  types according to the different cable types, optical fibers and copper cables, such as 1000BASE-LX/
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How to Choose a Gigabit Network Switch?

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Gigabit network switch is the most commonly used equipment in data centers. Before choosing the best network switch for the current or future network, people can type “ Ethernet switch ” into the online shopping site or search engine, they may find a ton of listings for switches of all kinds and price levels. It’s not an easy job to find one. Then how to choose a Gigabit network switch in order to avoid buying the wrong device or overspending needlessly? Figure: Gigabit network switch is widely used. Types of Gigabit Network Switch Gigabit Ethernet switch  can be divided into unmanaged, managed and PoE categories. Unmanaged switches use the plug-and-play design that means they only allow Ethernet devices to communicate with one another. They are shipped with fixed configuration and don’t allow any changes to this configuration. This type of network switch is normally found in home networks or small business. Managed switches offer all the features of unmanaged switches and
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What Is a KVM Switch and How Does It Work?

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Today, data centers and companies have to deal with the space limitation of lots of computers. They need a method to control the increasing numbers of computers and other networking devices efficiently. KVM switches are invented to combat this issue that is taking up valuable space and time. So what is a KVM switch and how does it work? Figure: KVM switch is widely used in our life. What Is a KVM Switch? What is KVM? KVM stands for keyboard, video  and  mouse. And as for what is a KVM switch, it’s technically “keyboard, video and mouse switch”. KVM switch is a hardware device that allows users to control different computers through one set of keyboard, video monitor and mouse. This is the KVM over IP solution, which is very useful if the server settings are located off-site and you don’t want to drive over there each time when you need to make changes. The switches will be assigned an IP address and accessed from any place in the world with the right username and password. I
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DSL vs Ethernet Cable vs Fiber Optic Cable Speed

Wifi is excellent, we all love it. But under the wireless work, there are serious cabling, and data travels through DSL, Ethernet cables and fiber optic cables. The question is, which one performs better? And what’s the difference between DSL, Ethernet cable and fiber optic cable speed? Don’t worry, we are here to help you understand the key differences among the different cables. What Is DSL? DSL stands for Digital Subscriber Line. It’s a communication medium used to deliver digital signals via the copper telephone lines. DSL service functions much like dial-up Internet service. However, unlike dial-up service, the “two-wire” technology of DSL makes it possible for users to connect to the broadband internet and make or receive phone calls at the same time. Because DSL utilizes the existing telephone lines which  means  there is no requirement for extra cabling for DSL service. Thus, it allows users to download files, watch online videos and support cloud backups. What Is Ethe
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SFP Fiber Switch Introduction and Cabling Solutions

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With the growth of today’s network, the amount of hardware involved has become a barrier to efficient and optimized network operations. In some cases, a fiber switch is  the answer . These fiber switches with management functions can reduce the burden on the network backbone, by connecting different edge-level devices and combining them into a single data stream. Today, we’ll focus on SFP  fiber switch  and its cabling solutions. SFP Fiber Switch Introduction As the name implies, an SFP fiber switch is a communication control device with SFP ports. And like a common networking switch, SFP fiber switch is also used to send and receive  data  transmission, but in fiber channel. These SFP ports are small form-factor hot pluggable interfaces, so the SFP optical transceiver modules can be inserted into the SFP ports. Then the fiber cables can be used to connect the fiber switch to other networking equipment. Advantages of SFP Fiber Switch SFP fiber switch can provide a higher relia
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GLC-SX-MM VS GLC-SX-MMD VS GLC-SX-MM-RGD VS SFP-GE-S

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Cisco is a worldwide leader in the telecommunication industry whose routers, switches are very welcome among the users. To work well with those Cisco networking applications, Cisco SFP transceivers are the best choice. GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD  and  SFP-GE-S are different types of Cisco 1000BASE SFP transceiver module. All these transceiver modules comply with IEEE 802.3z 1000BASE standard. And since there are similar specifications for these four transceiver modules, users may be confused when they need to choose one SFP module for their Cisco switches. Here we’ll make a comparison of GLC-SX-MM,  GLC-SX-MMD , GLC-SX-MM-RGD and SFP-GE-S transceiver modules to help you choose the suitable one. Which transceiver module will you choose? Cisco Transceiver Datasheet Here are the datasheets of these four different Cisco SFP transceiver modules. GLC-SX-MM Datasheet The GLC-SX-MM is programmed to be fully compatible and functional with all intended Cisco 1GB switching
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