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===== Symmetric Multiprocessing (SMP) =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]

**Symmetric Multiprocessing (SMP)** is the processing of programs by multiple processors that share a common [[dido:public:ra:xapend:xapend.a_glossary:o:os|operating system]] and memory. In symmetric (or "tightly coupled") multiprocessing, the processors share memory and the I/O bus or data path. A single copy of the operating system is in charge of all the processors. SMP, also known as a "shared everything" system, does not usually exceed 16 processors.

SMP systems are considered better than [[dido:public:ra:xapend:xapend.a_glossary:m:mpp]] systems for online transaction processing (OTP) in which many users access the same database in a relatively simple set of transactions. An advantage of SMP for this purpose is the ability to dynamically balance the workload among computers (and as a result serve more users faster).((
Rouse, Margret; __Definition of symmetric multiprocessing__, WhatIs.com, Accessed 8 December 2020,
[[https://searchdatacenter.techtarget.com/definition/SMP?_ga=2.233172572.392289681.1607438816-2133032675.1592258365]]
))

Source: [[https://searchdatacenter.techtarget.com/definition/SMP?_ga=2.233172572.392289681.1607438816-2133032675.1592258365 ]]


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