ECC memory prevents these single-bit errors by detecting and correcting them, and ensuring the data is properly preserved. ECC RAM constantly scans data as it is processed by the system, using a method known as parity checking. ECC memory adds an additional bit to each byte, called a parity bit.
The parity bit totals the 1s in the byte as either an even 0 or odd 1 binary digit. It can then use sophisticated code to restore the original, uncorrupted data and correct the error. In practice, this means less data corruption, fewer crashes and more uptime — key objectives for applications that process user data while offering high availability.
However, because of the extra processing required on the RAM chips, ECC may have a slight impact on memory performance. But with users prioritising the error minimisation and maximum uptime that ECC RAM provides, even if it does come with a minor performance hit, this is hardly a major issue. The slight performance advantage that comes with non-ECC memory over ECC memory is outweighed by the potential risks of a harmful single-bit error occurring.
For business-critical server applications, ECC memory is often well worth the short answer is yes. While running a long memtest86 session will usually find any problems, there may be very specific problems with the RAM which only show up rarely and in certain use cases. This can still happen much more frequently than the corruption that perfectly good ECC RAM is designed to protect against -- maybe once every month. So if you install monitoring software, you can be sure that your RAM is good, or replace bad chips.
So check prices; if prices are anywhere close, buy ECC if your workstation accommodates it. If you just mean the average desktop PC, then that is usually based on a platform that doesn't even have ECC support. If you mean a workstation class computer, then it quite likely comes with ECC memory whether you care about it or not. Overall, the workstation class is typically based on essentially server hardware but with proper graphics and packaged in a different form-factor. The expected workload is also more taxing than that of the desktop PC, so if you acknowledge that ECC makes sense for servers, then I think it's not much of a stretch that ECC also makes sense for workstations.
It can absolutely be argued that everything ought to have ECC but, right now, it's not practical as the industry has decided to make ECC a feature to differentiate higher end hardware.
The incidence is probably a few in a year, but it depends on the usage. So in a server environment the correctable errors might not be that important, but you boot the server machines rarely, so uncorrectable errors caused by failing RAM can be there undetected for a while corrupting your data.
I think that's the main reason why servers need ECC. Workstations boot and so check RAM frequently, so hardware failures can be detected by every reboot. If we are talking about memory errors, it is better to version the important documents on the server. So if the workstation reads and modifies something, then the original content should not be overwritten on the server.
Regular backups can do the same for you. Another aspect of this question is security. If your workstation is connected to any non-safe network, then it might be vulnerable to the row hammer attack , which exploits a DRAM related phenomenon.
I would use ECC everywhere, always, and I'm upset and disappointed I cannot get it on my MacBook Pro laptop, because otherwise it could completely replace my desktop server. In my desktop server, over 10 years I have had to replace 2 memory sticks due to persistent errors which would have just been random crashes and data corruption if it were not for ECC detecting and correcting them.
Not counting all the errors in those failed sticks, I would estimate seeing about 8 errors per year. Torvalds takes the bold position that the lack of ECC RAM in consumer technology is Intel's fault due to the company's policy of artificial market segmentation. Intel has a vested interest in pushing deeper-pocketed businesses toward its more expensive—and profitable—server-grade CPUs rather than letting those entities effectively use the necessarily lower-margin consumer parts.
Torvalds' argument here is that Intel's refusal to support ECC RAM in its consumer-targeted parts—along with its de facto near-monopoly in that space—is the real reason that ECC is nearly unavailable outside the server space. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. Ask Question. Asked 12 years, 6 months ago. Active 10 months ago. When the memory receives a read and write command, it will retrieve this directory first, and then perform read and write operations, which will greatly improve the efficiency of the server memory.
The Register memory that can be used at present also has ECC function, and some motherboards require the memory to support Register. In fact, all registered memory is ECC memory. The use of ECC memory requires the support of other computer components, such as the motherboard and cpu, and may also need to be set in the BIOS before it can be used on most server CPUs and motherboards some non-server CPUs and motherboards also support.
In addition, when purchasing ecc memory, you need to pay attention to whether it is ecc udimm or ecc rdimm or ecc lrdimm or ecc 3ds rdimm or something else. Because your computer configuration may not support some types. The data densities of the HDD push the edge where need to keep up with track integrity. All the ones that store the data encrypted 'at rest' basically have to if going to be competently implemented. What is ECC memory?
It's valued by professionals and businesses with critical data for its ability to automatically detect and correct memory errors, thus fighting data corruption. Non-ECC also called non-parity modules do not have this error-detecting feature. Using ECC decreases your computer's performance by about 2 percent. How does ECC memory work?
ECC memory uses the extra bits to store an encrypted code when writing data to memory, and the ECC code is stored at the same time. As data is processed, ECC memory is constantly scanning code with a special algorithm to detect and correct single-bit memory errors. What is the benefit of ECC memory? ECC memory protects your system from potential crashes and inadvertent changes in data by automatically correcting data errors.
This is achieved with the addition of a ninth computer chip on the RAM board, which acts as an error check and correction for the other eight chips.
Error-correcting code memory ECC memory is a type of computer data storage that can detect and correct the most common kinds of internal data corruption. ECC memory is used in most computers where data corruption cannot be tolerated under any circumstances, such as for scientific or financial computing.
Apogeeweb 19 Jul IntroductionFLASH is a kind of non-volatile memory, even the power is off, the data will not be lost. However, flash memory does not rewrite data in bytes like RAM to replace it. A flash memory chip i Continue reading ». Apogeeweb 14 Dec What is Computer Memory?
Types of Computer Memory. Apogeeweb 13 Jul Apogeeweb 20 Nov The specifications and definitions, fu
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