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CFQ - “In case of asynchronous requests, all the requests from all the processes are batched together according to their process's I/O priority”

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Clash Royale CLAN TAG #URR8PPP 0 I think the following statements about CFQ contradict each other: "In case of asynchronous requests, all the requests from all the processes are batched together according to their process's I/O priority ." The only requests that the IO scheduler considers to be asynchronous are regular "buffered" writes. " ionice does nothing to de-prioritize asynchronous write IO." Which statements are incorrect? Or if all of them are correct, why do they not contradict each other? linux-kernel io share | improve this question edited Feb 24 at 14:56 sourcejedi asked Feb 13 at 13:48 sourcejedi sourcejedi 24.8k 4 41 107 add a comment  |  0 I think the following statements about CFQ contradict each other: "In case of asynchronous requests, all the requests from all the processes are batched together according to their process's I/O priority ."

Natural gas

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The global natural gas trade in 2013. Numbers are in billion cubic meters per year. [1] Natural gas extraction by countries in cubic meters per year around 2013. Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium. [2] It is formed when layers of decomposing plant and animal matter are exposed to intense heat and pressure under the surface of the Earth over millions of years. The energy that the plants originally obtained from the sun is stored in the form of chemical bonds in the gas. [3] Natural gas is a naturally occurring hydrocarbon used as a source of energy for heating, cooking, and electricity generation. It is also used as a fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals. Natural gas is called a non-re