英文字典中文字典51ZiDian.com
|
|
fragmentation 音标拼音: [fr,ægmənt'eʃən] n. 分裂,破碎 ;
(在IP层将数据包分割成适合实体网络传输所能接受大小的程序) 分裂,破碎 ; (在IP层将数据包分割成适合实体网络传输所能接受大小的程式) fragmentation 碎裂; 分片 fragmentation 片段 fragmentation n 1: separating something into fine particles [synonym: {atomization}, {atomisation}, {fragmentation}] 2: the disintegration of social norms governing behavior and thought and social relationships 3: (computer science) the condition of a file that is broken up and stored in many different locations on a magnetic disk; "fragmentation slows system performance because it takes extra time to locate and assemble the parts of the fragmented file" 4: the scattering of bomb fragments after the bomb explodes fragmentation \fragmentation\ n. the act or process of separating something into small pieces or fine particles. Syn: atomization, atomisation. [WordNet 1.5] 1.
2. The process, or result, of splitting a large area of free memory (on disk or in main memory) into smaller non-contiguous blocks. This happens after many blocks have been allocated and freed. For example, if there is 3 kilobytes of free space and two 1k blocks are allocated and then the first one (at the lowest address) is freed, then there will be 2k of free space split between the two 1k blocks. The maximum size block that could then be allocated would be 1k, even though there was 2k free. The solution is to "compact" the free space by moving the allocated blocks to one end (and thus the free space to the other). As modern file systems are used and files are deleted and created, the total free space becomes split into smaller non-contiguous blocks (composed of "{clusters}" or "{sectors}" or some other unit of allocation). Eventually new files being created, and old files being extended, cannot be stored each in a single contiguous block but become scattered across the file system. This degrades performance as multiple {seek} operations are required to access a single fragmented file. Defragmenting consolidates each existing file and the free space into a continuous group of sectors. Access speed will be improved due to reduced seeking. The rate of fragmentation depends on the {algorithm} used to allocate space and the number and position of free sectors. A nearly-full file system will fragment more quickly. {MS-DOS} and {Microsoft Windows} use the simplest algorithm to allocate free clusters and so fragmentation occurs quickly. A disk should be defragmented before fragmentation reaches 10%. See {garbage collection}. (1997-08-29)
请选择你想看的字典辞典：
|
安装中文字典英文字典查询工具!
英文字典中文字典相关资料:
|
中文字典-英文字典 2005-2009