| 释义 |
roll-in roll-out, n. Computing.|ˈrəʊlɪn ˈrəʊlaʊt|
Also roll out/roll in, etc.
[f. to roll in, to roll out: see roll v.2 1 f.]
The process of switching (usu. large) bodies of data, instructions, etc. between the main and auxiliary memories of a computer system in order to process several tasks simultaneously.
[1970O. Dopping Computers & Data Processing ix. 123 Roll-in and roll-out together are often called core swapping.] 1973H. Katzan Operating Syst. vi. 152 If the ROLL parameter is used and a job step requires more main storage than was requested in the REGION parameter, the roll out/roll in routines attempt to assign additional main storage from the dynamic area. 1974Tsichritzis & Bernstein Operating Syst. iv. 79 One solution to the foregoing difficulties is to permit the system to move entire jobs in and out of core after their initial loading. This strategy, called swapping or roll-in-roll-out, can be implemented by using a relocation register. 1976W. Y. Arms et al. Computing xi. 263 Roll in roll out is simple and effective in many circumstances, but is not suitable for large time sharing systems because the computer can easily find that it spends all its time dumping and retrieving the user area. 1983Peterson & Silberschatz Operating Syst. Concepts v. 149 When the higher-priority job finishes, the lower-priority job can be swapped back in and continued. This variant of swapping is sometimes called roll-out/roll-in. 1990Dict. Computing (ed. 3) 397/1 Roll-in roll-out, a method of handling memory in a system dealing with a number of simultaneously active processes. |