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Qu'est-ce (qui) est RAM compression - définition

CONCEPT IN COMPUTER DATA COMPRESSION

Asymmetric compression; Symmetric compression

Virtual memory compression

RAM Compression; Memory compression; RAM compression; Compressed RAM

Virtual memory compression (also referred to as RAM compression and memory compression) is a memory management technique that utilizes data compression to reduce the size or number of paging requests to and from the auxiliary storage. In a virtual memory compression system, pages to be paged out of virtual memory are compressed and stored in physical memory, which is usually random-access memory (RAM), or sent as compressed to auxiliary storage such as a hard disk drive (HDD) or solid-state drive (SSD).

https://en.wikipedia.org/wiki/Virtual_memory_compression

ram-raid

TYPE OF BURGLARY IN WHICH A VEHICLE IS DRIVEN INTO A BUILDING

Ramraiding; Ram raid; Ram raiding; Ram-raid; Ramraid; Ram raids

(ram-raids, ram-raiding, ram-raided)

1.

A ram-raid is the crime of using a car to drive into and break a shop window in order to steal things from the shop. (BRIT)

A shop in Station Road was the target of a ram-raid early yesterday.

N-COUNT

2.

If people ram-raid, they use a car to drive into and break a shop window in order to steal things from the shop. (BRIT)

The kids who are joyriding and ram-raiding are unemployed.

VERB: V, also V n

• ram-raider (ram-raiders)

Ram-raiders smashed their way into a high-class store.

N-COUNT

lossy

DATA COMPRESSION APPROACH THAT RESULTS IN LOSS OR CHANGE OF SOME DATA

Lossy; Lossy encoding; Lossy data compression; Data compression/lossy; List of lossy compression methods; Irreversible compression

<algorithm> A term describing a data compression algorithm which actually reduces the amount of information in the data, rather than just the number of bits used to represent that information. The lost information is usually removed because it is subjectively less important to the quality of the data (usually an image or sound) or because it can be recovered reasonably by interpolation from the remaining data. MPEG and JPEG are examples of lossy compression techniques. Opposite: lossless. (1995-03-29)

Wikipédia

Data compression symmetry

Symmetry and asymmetry, in the context of data compression, refer to the time relation between compression and decompression for a given compression algorithm.

If an algorithm takes the same time to compress a data archive as it does to decompress it, it is considered symmetrical. Note that compression and decompression, even for a symmetric algorithm, may not be perfectly symmetric in practice, depending on the devices the data is being copied to and from, and other factors such as latency and the fragmentation on the device.

In turn, if the compression and decompression times of an algorithm are vastly different, it is considered asymmetrical.

https://en.wikipedia.org/wiki/Data compression symmetry