Tag Archive for 'IT'

CPU Specification number or S-spec number

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Malgent
on October 24, 2008
in Hardware
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Specification number, or S-spec number, is a five character code that uniquely identifies such CPU characteristics as core frequency, bus frequency, the size of level 2 cache, thermal design power, and so on. Specification numbers always start from letter ‘S’ and are usually printed on the top of the CPU. Intel Pentium, Pentium MMX and Celeron processors in plastic PPGA package have specification numbers printed on the bottom of the CPU. To find out processor characteristics from the specification number please use “Search by S-Spec” form on this page. We also recommend to use Intel processor finder tool.

Some examples of specification numbers: SL92C, SL7PW, SL3XX

NOTE: Intel engineering and qualification samples are marked with specification numbers that start from ‘Q’ - these are so called QDF numbers, and they are used to identify qualification and engineering samples.

Processor (CPU) model numbers

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Malgent
on October 24, 2008
in Reference
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Processor model numbers are used to distinguish between microprocessors with different sets of features and different characteristics, such as speed, level 1 and level 2 cache, etc. The model numbers can be used to identify only basic features and most important characteristics, and may not be used to identify all features/parameters of the CPU. For example, model numbers never identify CPU ID, core stepping, core voltage, maximum CPU temperature and a few other parameters. If you need to find out all details on specific processor please use sSpec numbers for Intel processors or order product numbers for AMD microprocessors.

For more information on Intel model numbers please see Intel processor (model) numbers.

For more information on AMD model number please see Athlon XP, Athlon 64, Sempron and Turion model number and Opteron model numbers.

Mean time between failures

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Malgent
on July 21, 2008
in Hardware and Reference
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Mean time between failures (MTBF) is the mean (average) time between failures of a system, and is often attributed to the “useful life” of the device i.e. not including ‘infant mortality’ or ‘end of life’ if the device is not repairable. Calculations of MTBF assume that a system is “renewed”, i.e. fixed, after each failure, and then returned to service immediately after failure. The average time between failing and being returned to service is termed mean down time (MDT) or mean time to repair (MTTR).

It's just a matter of time.

It's just a matter of time.

Mathematically, the MTBF is the sum of the MTTF (mean time to failure) and MTTR (mean time to repair). The MTTF is simply the reciprocal of the failure rate, Continue reading ‘Mean time between failures’

Linux Apache MySQL PHP

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Malgent
on November 23, 2007
in Reference, server and software
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tux.pngThe acronym LAMP refers to a solution stack of software, usually free software / open-source software, used to run dynamic Web sites or servers. The original expansion is as follows:

  • Linux, referring to the operating system;
  • Apache, the Web server;
  • MySQL, the database management system (or database server);
  • PHP, the programming languages.

The combination of these technologies is used primarily to define a web server infrastructure, define a programming paradigm of developing software, and establish a software distribution package.

I’ve made this small graphic (80×15 pixels) that you can use to designate your usage of this type of server. L.A.M.P.

Continue reading ‘Linux Apache MySQL PHP’