... 顺序存取存储 sequential access storage 顺序存取磁盘 sequential access disk 顺序开关 sequence switch ...
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indexed sequential access disk 索引顺序存取磁盘
With sequential access, the disk head can move directly to the next available track on the disk.
使用顺序访问，磁盘头可以直接移动到磁盘的下一个可用磁道。
DB2 row compression features can decrease disk storage requirements while at the same time improve sequential read access of large queries which perform full table scans.
DB 2行压缩功能可以减少磁盘存储需求，同时改进执行全表扫描的大量查询的顺序读取访问。
As a result, the disk access time is much longer when reading data in random order than when reading in sequential order.
因此，与按顺序读取相比，按随机顺序读取数据时的磁盘访问时间要长得多。
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