...总数据量为 N,分块后每次处理的数据量为 B(不妨设 N=nB), 则进 行一次分块排序所需要的时间为 t 0 (B),由读入数据块(read block)、排序块 (sort block)、保存数据块(write block)这 3 个步骤所需的时间决定.
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READ BLOCK LIMITS 读块限制
Block read commands 块读命令集
CURRENT MODE BLOCK READ 当前模式读取
Block Read 块读
CONSISTENT MODE BLOCK READ 一致模式块读取
Block Read Ahead 提前读块
Read measuring value block 读测量数据组
Block-read Mode 读块模式
The path from the system processor/memory/OS/App to the HBA contains only the read data block.
在从系统处理器/内存/操作系统/应用程序到 HBA 的路径上,只传输读取数据块。
CDATA is the XML command that tells the viewer to stop parsing the code and read the code within the block that follows as character data.
CDATA是XML命令,它告诉查看程序停止解析代码,并读取接下来的块中的代码,这里的代码是字符数据的形式。
A read of the snapshot will require a lookup to determine whether the block needed should be read from the snapshot or from the original file system.
对快照的读取将需要执行查找,以确定是从快照还是从原始文件系统读取所需的数据块。
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