In hardware conditions that constrain server performance, memory can be said to be a top priority! Its performance and quality are also an important aspect of evaluating server products. However, for server memory, I believe that because most people don't have much contact, it still lacks understanding. This article mainly answers two questions to readers: What is server memory? What is the essential difference between it and the desktop memory?
Server memory importance
Server running enterprise Critical business, a downtime caused by a memory error will permanently lose data. The memory itself is an electronic device, and it is easy to make various errors.
Therefore, faced with the pressure of business and the fact that the lack of itself, all manufacturers are already actively launch its own unique server memory technologies, such as HP's "on-line backup memory" and hot-plug mirrored memory; IBM's ChipKill Memory technology and hot replacement and hot add memory technology. With the expansion of enterprise information systems, the density and capacity of memory will also be correspondingly developed.
server memory performance to explore
* server memory is memory, it usually is no substantive difference in the appearance and structure in normal memory Computer City and seen us, it is mainly in the Some new techniques have been introduced in memory, and nothing is drawn from the appearance. So you may be worried, if someone else sells the memory stick of a normal PC when the server memory is sold to you, this is generally safe, and the possibility is almost zero. Because the memory on the ordinary PC is generally not available on the server, it also means that the server memory can not be replaced with the memory of the ordinary PC for the sake of cheapness. //This article from the application of computer hardware and software network www.45it.com reproduced please specify
* now commonly used in server memory and DDR SDRAM main two types, there is another RAMBUS memory is a high Performance, chip-to-chip interface technology for next-generation storage products. The emerging DDR2 is also gradually extending to server memory. Hyundai Hynix has begun mass production of DDR2 memory for servers and workstations in June last year.
* From a technical perspective, the reason for the distinction that ordinary memory, because ECC. This is a shorthand for ErrorChecking and Correcting. It is widely used in computer instructions in various fields. ECC is similar to Parity. However, in places where Parity can only detect errors, ECC can actually correct most errors. After the error correction of the memory, the operation instructions of the computer can continue to execute. This invisibly ensures the stability and reliability of the server system. However, ECC technology can only correct single-bit memory errors. When a multi-bit error occurs, ECC memory will generate a non-maskable interrupt (NMI), and the system will automatically stop running.
understand
products for general memory, the user is aware of the importance parameters such as bandwidth, memory bus speed, waiting period, CAS delay time and other parameters. But for the server, we consider the memory production process, the server memory generally uses 8 layers of PCB board, the perfect power layer and wiring layer fully reflect the stability gap; and the memory packaging technology, it can not only give Memory brings volume ideality, capacity scalability, and more importantly, heat dissipation, reliability, and density. Product vendors do a better job in these areas, such as:
Kingston server memory. Kingston Kingston, as the world's largest and most professional memory manufacturer, has long been accumulating experience, making it equally good in high-end server memory manufacturing, with production technology advantages unmatched by other memory manufacturers. It provides efficient and stable products for your server with high quality and rigorous testing. To ensure the quality of each server's memory, Kingston implements a comprehensive quality control process for all memory products, for each server memory. Each storage unit on each chip on the product is rigorously tested, making the Kingston server memory nearly 100% reliable.
Samsung single 1GB PC2100 ECC DDR. This strip is mainly for the entry-level server market, which uses Samsung's own memory chip, model K4H510638E-TCB0. The chip has a capacity of up to 64M, 4 Bank architecture design, SSTL2 interface interface, 66-pin TSOP2 package, default operating voltage 2.5V, default operating frequency is DDR200 when CL=2, DDR266 when CL=2.5 or more. The physical structure of the chip is different from the DDR memory chip we usually use. It consists of two layers of chips.