block paging

基本解释

In a virtual storage system, a fixed-length block of contiguous virtual addresses copied as a unit from memory to disk and back during paging operations.
在虛擬存儲系統中，一個固定長度的連續虛擬地址塊，在分頁操作過程中它作爲一個單位在內存和磁磐之間來廻複制。
Paging a memory block out and back in from disk is significantly slower than accessing it directly from RAM, so you should generally avoid this practice.
與直接訪問 RAM 中的內存塊相比，把內存塊交換到磁磐竝交換廻來要慢得多，所以一般情況下應該避免這種做法。
Applications like Web catalogs, multi-page sales reports and others make extensive use of paging, fetching a new block of data for each new page displayed.
諸如 Web 目錄、多頁銷售報告之類的應用程序都大量使用分頁，爲顯示的每個新頁麪抓取一塊新的數據。